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Kang SH, Mirka GA. Effects of a Passive Back-Support Exosuit on Erector Spinae and Abdominal Muscle Activity During Short-Duration, Asymmetric Trunk Posture Maintenance Tasks. Hum Factors 2024; 66:1830-1843. [PMID: 37635094 DOI: 10.1177/00187208231197264] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/29/2023]
Abstract
OBJECTIVE To examine the effects of asymmetry and lower extremity mobility restrictions on the effectiveness of a passive back-support exosuit in short-duration, static trunk flexion postures. BACKGROUND The effectiveness of trunk exoskeletons/suits for sagittally symmetric trunk posture maintenance has been investigated, but there has been limited study of the effects of asymmetric trunk postures or lower extremity motion restriction. METHOD Sixteen participants held trunk flexion postures involving trunk flexion (20°, 40°, 60°), asymmetry (0°, 30°), and lower extremity mobility (Free, Restricted) for 3 s. Participants held these postures with and without an exosuit while erector spinae and abdominal muscle activities were collected. RESULTS There were no significant interactions between exosuit and asymmetry or exosuit and lower extremity motion restrictions, indicating no significant effects of these factors on the effectiveness of the exosuit at reducing trunk muscle activity. The exosuit was found to be effective at reducing erector spinae muscle activity regardless of asymmetry of posture or lower extremity restrictions (average 21%, from 11.2% MVC to 8.8% MVC). The magnitude of the erector spinae activity at 60° of trunk flexion with the exosuit was similar to that seen at 20° without the exosuit. CONCLUSION The exosuit consistently provided biomechanical benefit through reduced activation of the erector spinae muscles and neither asymmetry of trunk posture nor lower extremity restriction influenced this effectiveness. APPLICATION Trunk exoskeletons/suits can reduce trunk muscle activation and understanding how characteristics of the trunk postures assumed impact these responses may help target tasks wherein these devices may be effective.
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Arita K, Ogasawara I, Konda S, Matsuo T, Uno Y, Yoshida N, Zhang X, Nishizawa I, Liu J, Nakata K. Decreased moment of inertia of the lower limb facilitates a rapid hip internal rotation in a simulated foot impact maneuver. A laboratory-controlled biomechanical study for a precursor mechanism of noncontact anterior cruciate ligament injury. J Sports Med Phys Fitness 2024; 64:567-577. [PMID: 38436594 DOI: 10.23736/s0022-4707.23.15483-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2024]
Abstract
BACKGROUND Anterior cruciate ligament injury frequently occurs in the deceleration with the knee-extended position. In addition, a rapid hip internal rotation is concomitantly observed. However, how the extended knee position induces the hip internal rotation is unclear. METHODS Sixteen healthy participants performed the simulated foot impact task on the experimental chair. To vary the knee flexion angle, the following four-foot placement positions relative to the pelvis segment, i.e.: 1) near; 2) middle; 3) far; and 4) far + heel strike, were tested. The reflective marker positions and the ground reaction force (GRF) data were collected. The moment of inertia of the entire lower limb around its long axis as well as the peak hip internal rotation angular velocity were calculated and compared among four conditions (Wilcoxon Signed-Rank Test with Bonferroni correction, P<0.0083). RESULTS As the knee extended from the near to far + heel strike condition, the moment of inertia of the entire lower limb significantly decreased and hip internal rotation angular velocity significantly increased (P<0.001). CONCLUSIONS The extended knee position with far foot placement from torso reduces the inertial resistance of the entire lower limb around its long axis and is vulnerable to the hip internal rotation.
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Affiliation(s)
- Kazuki Arita
- Department of Health and Sports Sciences, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Issei Ogasawara
- Department of Health and Sports Sciences, Graduate School of Medicine, Osaka University, Osaka, Japan -
- Department of Sports Medical Biomechanics, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Shoji Konda
- Department of Health and Sports Sciences, Graduate School of Medicine, Osaka University, Osaka, Japan
- Department of Sports Medical Biomechanics, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Tomoyuki Matsuo
- Department of Health and Sports Sciences, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Yuki Uno
- Department of Health and Sports Sciences, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Natsuki Yoshida
- Department of Health and Sports Sciences, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Xuemei Zhang
- Department of Health and Sports Sciences, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Izumi Nishizawa
- Department of Health and Sports Sciences, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Jianting Liu
- Department of Health and Sports Sciences, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Ken Nakata
- Department of Health and Sports Sciences, Graduate School of Medicine, Osaka University, Osaka, Japan
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Sherman NE, Elion O, Kozol Z, Einat M, Frenkel-Toledo S. Ipsilateral transfer of motor skill from lower to upper limb in healthy adults: A randomized controlled trial. PLoS One 2024; 19:e0303459. [PMID: 38768164 PMCID: PMC11104604 DOI: 10.1371/journal.pone.0303459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 04/25/2024] [Indexed: 05/22/2024] Open
Abstract
BACKGROUND AND PURPOSE Whereas motor skills of the untrained upper limb (UL) can improve following practice with the other UL, it has yet to be determined if an UL motor skill can improve following practice of that skill with the lower limb (LL). METHODS Forty-five healthy subjects randomly participated in a 10-minute single-session intervention of (1) practicing 50 reaching movement (RM) sequences with the non-dominant left LL toward light switches (LL group); or (2) observing the identical 50 light switches sequences (Switches Observation (SO) group); or (3) observing nature films (Nature Observation (NO) group). RM sequence performance with the left UL toward the light switches was tested before and immediately after the intervention and retested after 24 h. RESULTS Reaching response time improved in the LL group more than in the SO and NO groups in the posttest (pBonferroni = 0.038 and pBonferroni < 0.001, respectively), and improved in the LL group more than in the NO group in the retest (pBonferroni = 0.004). Percentage of fails did not differ between groups across the timepoints. CONCLUSIONS It appears that the actual practice of the RM sequence skill with the UL together with the cognitive element embedded in the observation of the RM sequences contributes to ipsilateral transfer from LL to UL.
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Affiliation(s)
- Noa Efrat Sherman
- Department of Physical Therapy, School of Health Sciences, Ariel University, Ariel, Israel
| | - Orit Elion
- Department of Physical Therapy, School of Health Sciences, Ariel University, Ariel, Israel
| | - Zvi Kozol
- Department of Physical Therapy, School of Health Sciences, Ariel University, Ariel, Israel
| | - Moshe Einat
- Department of Electrical and Electronic Engineering, Ariel University, Ariel, Israel
| | - Silvi Frenkel-Toledo
- Department of Physical Therapy, School of Health Sciences, Ariel University, Ariel, Israel
- Department of Neurological Rehabilitation, Loewenstein Medical Rehabilitation Center, Raanana, Israel
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Mozafaripour E, Shirvani H, Alikhani S, Bayattork M, Yaghoubitajani Z, Andersen LL. The effect of a suspension training on physical fitness, lower extremity biomechanical factors, and occupational health in Navy personnel: a randomized controlled trial. Sci Rep 2024; 14:11192. [PMID: 38755263 PMCID: PMC11099111 DOI: 10.1038/s41598-024-61933-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Accepted: 05/11/2024] [Indexed: 05/18/2024] Open
Abstract
Optimal physical fitness is essential for military personnel to effectively meet their rigorous physical demands. This study aimed to investigate the effectiveness of a suspension training program on physical fitness, biomechanical risk factors for lower extremity injury, mental health, and work-related factors in Navy personnel. A total of 50 young men participated in a randomized controlled trial. The participants were randomly assigned to two groups (n = 25): the intervention group and the control group. The intervention group performed an eight-week suspension training session three times per week, while the control group maintained their daily duties. The primary outcome was physical performance. The secondary outcomes were determined biomechanical risk factors for lower extremity injuries, mental health, and work-related factors. The data were analyzed using the analysis of covariance (ANCOVA). Compared with the control group, the intervention group showed significant improvements in physical performance, biomechanical risk for lower extremity injuries, and work-related factors from baseline to follow-up (p ≤ 0.05). However, there was no improvement in mental health. Based on these findings, suspension training positively impacted physical fitness, reduced injury risk, and enhanced the work-related factors of Navy personnel. This study provides new insights for various related experts and military coaches because it is an easy-to-use and feasible method with minimal facilities.
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Affiliation(s)
- Esmaeil Mozafaripour
- Health and Sports Medicine Department, Faculty of Physical Education and Sport Sciences, University of Tehran, between 15th and 16th St., North Kargar st., Tehran, Iran.
| | - Hossein Shirvani
- Exercise Physiology Research Center Research Institute for Life Style Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Sobhan Alikhani
- Faculty of Sport Sciences, Shahid Rajaee Teacher Training University, Tehran, Iran
| | - Mohammad Bayattork
- Sport Sciences and Physical Education, Faculty of Humanities Science, University of Hormozgan, Bandar Abbas, Iran
| | - Zohreh Yaghoubitajani
- Department of Health and Sport Rehabilitation, Faculty of Sport Sciences and Health, Shahid Beheshti University, Tehran, Iran
| | - Lars Louis Andersen
- National Research Centre for the Working Environment, Copenhagen, Denmark
- Department of Health Science and Technology, Aalborg University, 9220, Aalborg, Denmark
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AminiAghdam S, Rode C. Posture-induced modulation of lower-limb joint powers in perturbed running. PLoS One 2024; 19:e0302867. [PMID: 38743754 PMCID: PMC11093285 DOI: 10.1371/journal.pone.0302867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Accepted: 03/18/2024] [Indexed: 05/16/2024] Open
Abstract
Despite evidence on trunk flexion's impact on locomotion mechanics, its role in modulating lower-limb energetics during perturbed running remains underexplored. Therefore, we investigated posture-induced power redistribution in the lower-limb joints (hip, knee, and ankle), along with the relative contribution from each joint to total lower-limb average positive and negative mechanical powers (i.e., over time) during perturbed running. Twelve runners (50% female) ran at self-selected (~15°) and three more sagittal trunk inclinations (backward, ~0°; low forward, ~20°; high forward, ~25°) on a custom-built runway, incorporating both a level surface and a 10 cm visible drop-step positioned midway, while simultaneously recording three-dimensional kinematics and kinetics. We used inverse dynamics analysis to determine moments and powers in lower-limb joints. Increasing the trunk forward inclination yielded the following changes in lower-limb mechanics: a) an elevation in total positive power with a distoproximal shift and a reduction in total negative power; b) systematic increases in hip positive power, coupled with decreased and increased contribution to total negative (during level-step) and positive (during drop-step) powers, respectively; c) reductions in both negative and positive knee powers, along with a decrease in its contribution to total positive power. Regardless of the trunk posture, accommodating drop-steps while running demands elevated total limb negative and positive powers with the ankle as a primary source of energy absorption and generation. Leaning the trunk more forward induces a distoproximal shift in positive power, whereas leaning backward exerts an opposing influence on negative power within the lower-limb joints.
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Affiliation(s)
- Soran AminiAghdam
- Carnegie School of Sport, Leeds Beckett University, Leeds, United Kingdom
- Department of Motion Science, Institute of Sport Science, Friedrich-Schiller-University, Jena, Germany
| | - Christian Rode
- Department of Motion Science, Institute of Sport Science, Friedrich-Schiller-University, Jena, Germany
- Department of Biomechanics, Institute of Sport Science, University of Rostock, Rostock, Germany
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Wang IL, Gu CY, Lei TH, Su Y, Yao S, Mündel T, Mo S. Effect of hyperthermia on simulated muscle activation in female when crossing obstacle. Sci Rep 2024; 14:10635. [PMID: 38724575 PMCID: PMC11082249 DOI: 10.1038/s41598-024-61536-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 05/07/2024] [Indexed: 05/12/2024] Open
Abstract
It is well known that hyperthermia greatly impairs neuromuscular function and dynamic balance. However, whether a greater level of hyperthermia could potentially alter the lower limb simulated muscle activation when crossing an obstacle in female participants remains unknown. Therefore we examined the effect of a systematic increase in oral temperature on lower limb simulated muscle activation when crossing an obstacle in female participants. Eighteen female participants were recruited where they underwent a control trial (Con) and two progressive passive heating trials with Δ 1°C and Δ 2°C increase of oral temperature (Toral) using a 45°C water bath. In each trial, we assessed lower limb simulated muscle activation when crossing an obstacle height of 10%, 20%, and 30% of the participant's leg length and toe-off, toe-above-obstacle and heel-strike events were identified and analyzed. In all events, the lower limb simulated muscle activation were greater in Δ2°C than Δ1°C and Con when both leading and trailing limbs crossed the obstacle height of 20% and 30% leg length (all p < 0.001). However, the lower limb simulated muscle activation were not different between Δ1°C and Con across all obstacle heights (p > 0.05). This study concluded that a greater level of hyperthermia resulted in a greater lower limb simulated muscle activation to ensure safety and stability when females cross an obstacle height of 20% leg length or higher.
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Affiliation(s)
- I-Lin Wang
- Laboratory of Human Kinesiology & Performance, School of Physical Education, Shenzhen University, Guangdong, People's Republic of China
| | - Chin-Yi Gu
- Graduate Institute, College of Physical Education, Hubei Normal University, Hubei, People's Republic of China
| | - Tze-Huan Lei
- Graduate Institute, College of Physical Education, Hubei Normal University, Hubei, People's Republic of China
| | - Yu Su
- Beijing Deanwell Technology Co., Ltd, Beijing, People's Republic of China
| | - Shun Yao
- Shanghai Hebin Rehabilitation Hospital, Shanghai, People's Republic of China
| | - Toby Mündel
- Department of Kinesiology, Brock University, St. Catharines, Canada
| | - Shiwei Mo
- Laboratory of Human Kinesiology & Performance, School of Physical Education, Shenzhen University, Guangdong, People's Republic of China.
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Liu X, Liang J, Liu Y. Effects of walking speeds on lower extremity kinematic synergy in toe vertical position control: An experimental study. Medicine (Baltimore) 2024; 103:e38024. [PMID: 38701268 PMCID: PMC11062729 DOI: 10.1097/md.0000000000038024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Accepted: 04/05/2024] [Indexed: 05/05/2024] Open
Abstract
BACKGROUND This study aimed to investigate whether lower limb joints mutually compensate for each other, resulting in motor synergy that suppresses toe vertical position fluctuation, and whether walking speeds affect lower limb synergy. METHODS Seventeen male university students walked at slow (0.85 ± 0.04 m/s), medium (1.43 ± 0.05 m/s) and fast (1.99 ± 0.06 m/s) speeds on a 15-m walkway while lower limb kinematic data were collected. Uncontrolled manifold analysis was used to quantify the strength of synergy. Two-way (speed × phase) repeated-measures analysis of variance was used to analyze all dependent variables. RESULTS A significant speed-by-phase interaction was observed in the synergy index (SI) (P < .001). At slow walking speeds, subjects had greater SI during mid-swing (P < .001), while at fast walking speeds, they had greater SI during early-swing (P < .001). During the entire swing phase, fast walking exhibited lower SI values than medium (P = .005) and slow walking (P = .027). CONCLUSION Kinematic synergy plays a crucial role in controlling toe vertical position during the swing phase, and fast walking exhibits less synergy than medium and slow walking. These findings contribute to a better understanding of the role of kinematic synergy in gait stability and have implications for the development of interventions aimed at improving gait stability and reducing the risk of falls.
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Affiliation(s)
- Xuan Liu
- Beijing Sport University, Beijing, China
| | | | - Ye Liu
- Beijing Sport University, Beijing, China
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Macchi R, Kunimasa Y, Chavet P, Corcelle B, Pomportes L, Fazzari C, Hays A, Vercruyssen F, Rossi F, Bendahan D, Nicol C. Effect of a graded running race on lower limb muscle damage, jump performance and muscle soreness in men and women. Scand J Med Sci Sports 2024; 34:e14643. [PMID: 38700004 DOI: 10.1111/sms.14643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 04/02/2024] [Accepted: 04/22/2024] [Indexed: 05/05/2024]
Abstract
PURPOSE Delayed structural and functional recovery after a 20 km graded running race was analyzed with respect to the sex effect. METHODS Thirteen female and 14 male recreational runners completed the race and three test sessions: one before (PRE) and two after, once on Day 1 or 2 (D1-2) and then on Day 3 or 4 (D3-4). Muscle damage was assessed indirectly using ultrasonography to quantify changes in cross-sectional area (CSA) of 10 lower-limb muscles. Delayed onset of muscle soreness (DOMS) was assessed for three muscle groups. Functional recovery was quantified by kinetic analysis of a squat jump (SJ) and a drop jump (DJ) test performed on a sledge ergometer. Linear mixed models were used to assess control group reproducibility and recovery patterns according to sex. RESULTS Regardless of sex, DOMS peaked at D1-2 for all muscle groups and resolved at D3-4. CSA was increased in each muscle group until D3-4, especially in the semimembranosus muscle. A specific increase was found in the short head of the biceps femoris in women. Regardless of sex, SJ and DJ performances declined up to D3-4. Depending on the muscle, positive and/or negative correlations were found between structural and functional changes. Some of these were sex-specific. CONCLUSION Structural and functional recovery was incomplete in both sexes up to D3-4, although DOMS had disappeared. More emphasis should be placed on hamstring muscle recovery. Highlighting the intermuscular compensations that can occur during multi-joint testing tasks, the structural-functional relationships were either positive or negative, muscle- and sex-dependent.
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Affiliation(s)
- Robin Macchi
- Aix-Marseille Univ, CNRS, ISM, Marseille, France
- Laboratory Sport, Expertise and Performance (EA 7370), French Institute of Sport (INSEP), Paris, France
| | - Yoko Kunimasa
- Aix-Marseille Univ, CNRS, ISM, Marseille, France
- Niigata University, Niigata, Japan
| | | | - Baptiste Corcelle
- Laboratory of Human Motricity, Heath and Sport Expertise (LAMHESS), UPR 6312, University Côte d'Azur, Nice, France
| | - Laura Pomportes
- Aix-Marseille Université, HIPE Human-Lab (UAR202324378), Marseille, France
| | | | - Arnaud Hays
- Aix-Marseille Université, HIPE Human-Lab (UAR202324378), Marseille, France
| | | | - Francesca Rossi
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
- Aix-Marseille Univ, CNRS (UMR 7339), CRMBM, Marseille, France
| | - David Bendahan
- Aix-Marseille Univ, CNRS (UMR 7339), CRMBM, Marseille, France
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Kutac P, Jandacka D, Elavsky S, Uchytil J, Bunc V, Krajcigr M, Barot T. The effect of regular running on the bone tissue of middle-aged men and women. J Sports Med Phys Fitness 2024; 64:455-464. [PMID: 38261331 DOI: 10.23736/s0022-4707.23.15279-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
BACKGROUND Many authors consider running to be a protective physical activity (PA) in bone health. However, many studies also show inconsistencies in their results. The objective of the study is to analyze the effect of cumulative loading rate (TCL) on the bone mass of middle-aged runners and non-runners is assessed. METHODS This cross-sectional study included 322 individuals. There were 212 runners (109 male, 103 female) and those were individuals who did >10 km of running per week. There were 110 non-runners (54 male, 56 female). This group included individuals who did not adhere to the WHO (2020) recommendations for PA. The average age in the individual groups ranged from 40.9±4.1 to 42.3±4.8 years. Bone parameters were measured on the lower extremities and vertebral spine using the DXA method (Hologic QDR Horizon A). Multi-regression dependencies analysis was used to assess the results. RESULTS The results of the multi-regression dependencies analysis showed that the bone mineral content (BMC) and bone mineral density (BMD) are significantly influenced by the TCL and gender. CONCLUSIONS Therefore, we can conclude that running could be a suitable PA for preventing the reduction of BMD in the middle-aged population, especially in the lower limbs.
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Affiliation(s)
- Petr Kutac
- Department of Human Movement Studies, University of Ostrava, Ostrava, Czech Republic -
| | - Daniel Jandacka
- Department of Human Movement Studies, University of Ostrava, Ostrava, Czech Republic
| | - Steriani Elavsky
- Department of Human Movement Studies, University of Ostrava, Ostrava, Czech Republic
| | - Jaroslav Uchytil
- Department of Human Movement Studies, University of Ostrava, Ostrava, Czech Republic
| | - Vaclav Bunc
- Faculty of Education, Charles University, Prague, Czech Republic
| | - Miroslav Krajcigr
- Department of Human Movement Studies, University of Ostrava, Ostrava, Czech Republic
| | - Tomas Barot
- Department of Mathematics with Didactics, University of Ostrava, Ostrava, Czech Republic
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Yan Y, Gong R, Cao M, Han B, Li H, Liu G. The effect of different mechanism combinations on sliding between brace and lower limb during walking and leg-raising. Proc Inst Mech Eng H 2024; 238:500-507. [PMID: 38534031 DOI: 10.1177/09544119241241440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2024]
Abstract
Knee braces are commonly used to support the knee joint and improve function. However, brace sliding caused by the misalignment between brace and knee during motion is a common problem, which reduces the therapeutic effect and leads to brace abandonment. To investigate the effect of mechanism combinations on sliding, an experimental brace was designed to isolate the mechanism as the sole variable. Ten healthy participants were recruited, each of whom worn four combinations of lateral/medial mechanisms: lateral and medial single-axis (SA), lateral super gear (SG) and medial non-circular gear (NCG), lateral four-bar linkage (FL) and medial SG, and lateral FL and medial NCG. The knee flexion angle was collected using inertial measurement units, and brace sliding was measured by 3D motion capture system. All combinations had significant changes in peak sliding of thigh and shank compared to the SA combination (p < 0.05), but lateral FL and medial NCG combination had the lowest peak and final sliding during walking and leg-raising, with significant reductions of 40.7 and 85.3% in peak sliding of thigh, and significant reductions of 56.3 and 72.0% in peak sliding of shank, respectively (p < 0.05). Moreover, the mechanism combination did not significantly impact the knee range of motion (p > 0.05). The mechanism combination that fit the instantaneous center of rotation of lateral/medial condyle of knee joint demonstrates a significant reduction in brace sliding. Additionally, the peak sliding during motion is significantly higher than the final sliding.
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Affiliation(s)
- Yuzhou Yan
- Innovation Center of Bioengineering, Shaanxi Engineering Laboratory for Transmissions and Controls, Northwestern Polytechnical University, Xi'an, Shaanxi, P.R. China
| | - Ruitao Gong
- Innovation Center of Bioengineering, Shaanxi Engineering Laboratory for Transmissions and Controls, Northwestern Polytechnical University, Xi'an, Shaanxi, P.R. China
| | - Mengzhao Cao
- Innovation Center of Bioengineering, Shaanxi Engineering Laboratory for Transmissions and Controls, Northwestern Polytechnical University, Xi'an, Shaanxi, P.R. China
| | - Bing Han
- Innovation Center of Bioengineering, Shaanxi Engineering Laboratory for Transmissions and Controls, Northwestern Polytechnical University, Xi'an, Shaanxi, P.R. China
| | - Hui Li
- Joint Surgery Department, Xi'an Hong-hui Hospital, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi, P.R. China
| | - Geng Liu
- Innovation Center of Bioengineering, Shaanxi Engineering Laboratory for Transmissions and Controls, Northwestern Polytechnical University, Xi'an, Shaanxi, P.R. China
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de Moraes LS, Agostinete RR, Ribeiro BLL, Oliveira RS, Mortatti AL. Upper and lower limb bone mass accrual in adolescent footballers across a short period of training and competition. J Pediatr (Rio J) 2024; 100:289-295. [PMID: 38103576 PMCID: PMC11065656 DOI: 10.1016/j.jped.2023.07.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 07/12/2023] [Accepted: 07/18/2023] [Indexed: 12/19/2023] Open
Abstract
OBJECTIVES To analyze bone mineral content (BMC) and area bone mineral density (aBMD) accrual in adolescent male footballers who started their first football season. METHODS 17 athletes (14.8 ± 0.4 years) were monitored across 15 weeks of football training. Participants were evaluated for somatic maturation (HPHV), BMC, and aBMD at three time points: before (M1) and after (M2) a preparatory phase, and at the end of the competitive phase (M3). BMC and aBMD were measured using DXA scans. Participants were divided into groups according to maturation status (circa-PHV and post-PHV), and the amount of accumulated training load (median split). RESULTS A significant effect (12.1 g/week, standard error (SE) = 2.6 g/week) was observed for lower limbs BMC across the three time points. There were no significant effects of time for upper limbs BMC. There was a significant effect of time for total body aBMD (0.007, SE = 0.003 g/cm2/week) across the three time points. Adolescents at post-PHV had a significant 245.6 g (SE = 56.1 g) higher BMC compared to adolescents at circa-PHV. No significant effects were observed for the accumulated training load. CONCLUSION Systematic football training, even during the growth spurt, has a positive impact on adolescent bone markers despite the accumulated training load and maturation.
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Affiliation(s)
- Luhane Silva de Moraes
- Universidade Federal do Rio Grande do Norte (UFRN), Departamento de Educação Física, Natal, RN, Brazil
| | - Ricardo R Agostinete
- Universidade Estadual Paulista (UNESP), Departamento de Educação Física, Presidente Prudente, SP, Brazil
| | | | - Ricardo Santos Oliveira
- Universidade Federal do Rio Grande do Norte (UFRN), Departamento de Educação Física, Natal, RN, Brazil
| | - Arnaldo Luis Mortatti
- Universidade Federal do Rio Grande do Norte (UFRN), Departamento de Educação Física, Natal, RN, Brazil
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Komatsu T, Tateuchi H, Hirono T, Yamagata M, Ichihashi N. Influence of ankle invertor muscle fatigue on workload of the lower extremity joints during single-leg landing in the sagittal and frontal planes. Gait Posture 2024; 110:29-34. [PMID: 38471425 DOI: 10.1016/j.gaitpost.2024.02.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 01/23/2024] [Accepted: 02/28/2024] [Indexed: 03/14/2024]
Abstract
BACKGROUND Insufficient rigidity of the foot owing to its ligaments and muscles can decrease the attenuation of the ground reaction force during landing. Therefore, dysfunction of the ankle invertors may increase the proximal joint load during landing. RESEARCH QUESTION What are the effects of the fatigued ankle invertors on workload in the lower extremity joints during single-leg landing? METHODS Twenty-seven young adults (13 men and 14 women) performed landing trials in the forward and medial directions before and after exercise-induced fatigue of the ankle invertors. The exercise consisted of repeated concentric and eccentric ankle inversions until the maximum torque was below 80% of the baseline value. Negative joint workload during the landing tasks was calculated for the hip, knee, and ankle in the sagittal and frontal planes. Additionally, lower extremity work (the sum of the work of the hip, knee, and ankle) was calculated. RESULTS Invertor fatiguing exercise resulted in a significant increase in negative joint work in the frontal and sagittal plane hip and the frontal plane knee during medial landing, whereas no significant change in negative joint work was observed during forward landing. SIGNIFICANCE These findings suggested that ankle invertor dysfunction may induce a high load on the proximal joints and have direction-specific effects.
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Affiliation(s)
- Tomoyo Komatsu
- Rehabilitation Unit, Kyoto University Hospital, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Hiroshige Tateuchi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
| | - Tetsuya Hirono
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - Momoko Yamagata
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan; Faculty of Rehabilitation, Kansai Medical University, 18-89 Uyama Higashimachi, Hirakata, Osaka 573-1136, Japan
| | - Noriaki Ichihashi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
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Mater A, Boly A, Martin A, Lepers R. Cadence Modulation during Eccentric Cycling Affects Perception of Effort But Not Neuromuscular Alterations. Med Sci Sports Exerc 2024; 56:893-901. [PMID: 38181211 DOI: 10.1249/mss.0000000000003373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2024]
Abstract
INTRODUCTION A recent study showed that cadence modulation during short eccentric cycling exercise affects oxygen consumption (V̇O 2 ), muscular activity (EMG), and perception of effort (PE). This study examined the effect of cadence on V̇O 2 , EMG, and PE during prolonged eccentric cycling and exercise-induced neuromuscular alterations. METHODS Twenty-two participants completed three sessions 2-3 wk apart: 1) determination of the maximal concentric peak power output, familiarization with eccentric cycling at two cadences (30 and 60 rpm at 60% peak power output), and neuromuscular testing procedure; 2) and 3) 30 min of eccentric cycling exercise at a cadence of 30 or 60 rpm. PE, cardiorespiratory parameters, and vastus lateralis and rectus femoris EMG were collected during exercise. The knee extensors' maximal voluntary contraction torque, the torque evoked by double stimulations at 100 Hz (Dt100) and 10 Hz (Dt10), and the voluntary activation level were evaluated before and after exercise. RESULTS V̇O 2 , EMG, and PE were greater at 30 than 60 rpm (all P < 0.05). Maximal voluntary contraction torque, evoked torque, and Dt10/Dt100 ratio decreased (all P < 0.01) without cadence effect (all P > 0.28). Voluntary activation level remained constant after both eccentric cycling exercises ( P = 0.87). CONCLUSIONS When performed at the same power output, eccentric cycling exercise at 30 rpm elicited a greater PE, EMG, and cardiorespiratory demands than pedaling at 60 rpm. Exercise-induced fatigability was similar in both eccentric cycling conditions without neural impairments, suggesting that eccentric cycling seemed to alter more specifically muscular function, such as the excitation-contraction coupling process. In a rehabilitation context, eccentric cycling at 60 rpm seems more appropriate because it will induce lower PE for similar strength loss compared with 30 rpm.
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Affiliation(s)
- Adrien Mater
- Faculty of Sciences, INSERM UMR1093-CAPS, Université Bourgogne, Dijon, FRANCE
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Maikos JT, Chomack JM, Herlihy DV, Paglia DN, Wetterstrand C, O'Connor JP, Hyre MJ, Loan JP, D'Andrea SE. Quantifying Bone and Skin Movement in the Residual Limb-Socket Interface of Individuals With Transtibial Limb Loss Using Dynamic Stereo X-Ray: Protocol for a Lower Limb Loss Cadaver and Clinical Study. JMIR Res Protoc 2024; 13:e57329. [PMID: 38669065 PMCID: PMC11087852 DOI: 10.2196/57329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Revised: 02/29/2024] [Accepted: 03/04/2024] [Indexed: 04/28/2024] Open
Abstract
BACKGROUND Relative motion between the residual limb and socket in individuals with transtibial limb loss can lead to substantial consequences that limit mobility. Although assessments of the relative motion between the residual limb and socket have been performed, there remains a substantial gap in understanding the complex mechanics of the residual limb-socket interface during dynamic activities that limits the ability to improve socket design. However, dynamic stereo x-ray (DSX) is an advanced imaging technology that can quantify 3D bone movement and skin deformation inside a socket during dynamic activities. OBJECTIVE This study aims to develop analytical tools using DSX to quantify the dynamic, in vivo kinematics between the residual limb and socket and the mechanism of residual tissue deformation. METHODS A lower limb cadaver study will first be performed to optimize the placement of an array of radiopaque beads and markers on the socket, liner, and skin to simultaneously assess dynamic tibial movement and residual tissue and liner deformation. Five cadaver limbs will be used in an iterative process to develop an optimal marker setup. Stance phase gait will be simulated during each session to induce bone movement and skin and liner deformation. The number, shape, size, and placement of each marker will be evaluated after each session to refine the marker set. Once an optimal marker setup is identified, 21 participants with transtibial limb loss will be fitted with a socket capable of being suspended via both elevated vacuum and traditional suction. Participants will undergo a 4-week acclimation period and then be tested in the DSX system to track tibial, skin, and liner motion under both suspension techniques during 3 activities: treadmill walking at a self-selected speed, at a walking speed 10% faster, and during a step-down movement. The performance of the 2 suspension techniques will be evaluated by quantifying the 3D bone movement of the residual tibia with respect to the socket and quantifying liner and skin deformation at the socket-residuum interface. RESULTS This study was funded in October 2021. Cadaver testing began in January 2023. Enrollment began in February 2024. Data collection is expected to conclude in December 2025. The initial dissemination of results is expected in November 2026. CONCLUSIONS The successful completion of this study will help develop analytical methods for the accurate assessment of residual limb-socket motion. The results will significantly advance the understanding of the complex biomechanical interactions between the residual limb and the socket, which can aid in evidence-based clinical practice and socket prescription guidelines. This critical foundational information can aid in the development of future socket technology that has the potential to reduce secondary comorbidities that result from complications of poor prosthesis load transmission. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID) DERR1-10.2196/57329.
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Affiliation(s)
- Jason T Maikos
- Veterans Affairs New York Harbor Healthcare System, New York, NY, United States
| | - John M Chomack
- Veterans Affairs New York Harbor Healthcare System, New York, NY, United States
| | - David V Herlihy
- Narrows Institute for Biomedical Research and Education, Inc., Brooklyn, NY, United States
| | - David N Paglia
- Department of Orthopaedics, Rutgers-New Jersey Medical School, Newark, NJ, United States
| | - Charlene Wetterstrand
- Department of Orthopaedics, Rutgers-New Jersey Medical School, Newark, NJ, United States
| | - J Patrick O'Connor
- Department of Orthopaedics, Rutgers-New Jersey Medical School, Newark, NJ, United States
| | - Michael J Hyre
- Narrows Institute for Biomedical Research and Education, Inc., Brooklyn, NY, United States
| | | | - Susan E D'Andrea
- Department of Kinesiology, College of Health Sciences, University of Rhode Island, Kingston, RI, United States
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Raitor M, Ruggles SW, Delp SL, Liu CK, Collins SH. Lower-Limb Exoskeletons Appeal to Both Clinicians and Older Adults, Especially for Fall Prevention and Joint Pain Reduction. IEEE Trans Neural Syst Rehabil Eng 2024; 32:1577-1585. [PMID: 38536680 DOI: 10.1109/tnsre.2024.3381979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
Exoskeletons are a burgeoning technology with many possible applications to improve human life; focusing the effort of exoskeleton research and development on the most important features is essential for facilitating adoption and maximizing positive societal impact. To identify important focus areas for exoskeleton research and development, we conducted a survey with 154 potential users (older adults) and another survey with 152 clinicians. The surveys were conducted online and to ensure a consistent concept of an exoskeleton across respondents, an image of a hip exoskeleton was shown during exoskeleton-related prompts. The survey responses indicate that both older adults and clinicians are open to using exoskeletons, fall prevention and joint pain reduction are especially important features, and users are likely to wear an exoskeleton in the scenarios when it has the greatest opportunity to help prevent a fall. These findings can help inform future exoskeleton research and guide the development of devices that are accepted, used, and provide meaningful benefit to users.
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Asaeda M, Hirata K, Ohnishi T, Ito H, Miyahara S, Mikami Y. Differences in lower-limb biomechanics during single-leg landing considering two peripheral fatigue tasks. PLoS One 2024; 19:e0297910. [PMID: 38603690 PMCID: PMC11008898 DOI: 10.1371/journal.pone.0297910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Accepted: 01/15/2024] [Indexed: 04/13/2024] Open
Abstract
Dynamic knee valgus (DKV) occurs during landing after a fatigue task involving the lower extremity. However, the manner in which different peripheral fatigue tasks affect DKV remains unknown. In this study, we investigated the DKV via electromyography during single-leg landing considering the hip-joint fatigue task (HFT) and knee-joint fatigue task (KFT) performed by healthy men. We recruited 16 healthy male participants who performed a single-leg jump-landing motion from a height of 20 cm before and after an isokinetic hip abduction/adduction task (HFT) and knee extension/flexion task (KFT). Three-dimensional motion analysis systems were attached to the left gluteus medius and quadriceps, and surface electromyography was used to analyze the lower limb kinematics, kinetics, and muscle activity. The primary effects and interactions of the task and fatigue were identified based on the two-way repeated-measures analysis of variance. The results of the average angle during landing indicated that DKV occurs in KFT, whereas HFT applies external forces that adduct and internally rotate the knee at peak vertical ground reaction force (vGRF). Furthermore, both KFT and HFT exhibited an increase in muscle activity in the quadriceps. The analysis revealed that the occurrence of DKV varies depending on the peripheral fatigue task, and the effects on average DKV during landing and DKV at peak vGRF vary depending on the peripheral fatigue task.
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Affiliation(s)
- Makoto Asaeda
- Faculty of Wakayama Health Care Sciences, Takarazuka University of Medical and Health, Wakayama, Japan
- Division of Rehabilitation, Department of Clinical Practice and Support, Hiroshima University Hospital, Hiroshima, Japan
| | - Kazuhiko Hirata
- Division of Rehabilitation, Department of Clinical Practice and Support, Hiroshima University Hospital, Hiroshima, Japan
| | - Tomoya Ohnishi
- Faculty of Wakayama Health Care Sciences, Takarazuka University of Medical and Health, Wakayama, Japan
| | - Hideyuki Ito
- Faculty of Wakayama Health Care Sciences, Takarazuka University of Medical and Health, Wakayama, Japan
| | - So Miyahara
- Faculty of Wakayama Health Care Sciences, Takarazuka University of Medical and Health, Wakayama, Japan
| | - Yukio Mikami
- Department of Rehabilitation Medicine, Hiroshima University Hospital, Hiroshima, Japan
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Pan J, Fu W, Lv J, Tang H, Huang Z, Zou Y, Zhang X, Liao B. Biomechanics of the lower limb in patients with mild knee osteoarthritis during the sit-to-stand task. BMC Musculoskelet Disord 2024; 25:268. [PMID: 38582828 PMCID: PMC10998381 DOI: 10.1186/s12891-024-07388-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Accepted: 03/27/2024] [Indexed: 04/08/2024] Open
Abstract
BACKGROUND Knee osteoarthritis (KOA) is a prevalent and debilitating condition that markedly affects the sit-to-stand (STS) activity of patients, a prerequisite for daily activities. Biomechanical recognition of movements in patients with mild KOA is currently attracting attention. However, limited studies have been conducted solely on the observed differences in sagittal plane movement and muscle activation. AIM This study aimed to identify three-dimensional biomechanical and muscle activation characteristics of the STS activity in patients with mild KOA. METHODS A cross-sectional study was conducted to observe the differences between patients with mild KOA and a control group (CG). It was conducted to observe the differences in muscle activation, including root mean square (RMS%) and integrated electromyography (items), kinematic parameters like range of motion (ROM) and maximum angular velocity, as well as dynamic parameters such as joint moment and vertical ground reaction force (vGRF). RESULTS Patients with mild KOA had a higher body mass index and longer task duration. In the sagittal plane, patients with KOA showed an increased ROM of the pelvic region, reduced ROM of the hip-knee-ankle joint, and diminished maximum angular velocity of the knee-ankle joint. Furthermore, patients with KOA displayed increased knee-ankle joint ROM in the coronal plane and decreased ankle joint ROM in the horizontal plane. Integrated vGRF was higher in both lower limbs, whereas the vGRF of the affected side was lower. Furthermore, patients showed a decreased peak adduction moment (PADM) and increased peak external rotation moment in the knee joint and smaller PADM and peak internal rotation moment in the ankle joint. The affected side exhibited decreased RMS% and iEMG values of the gluteus medius, vastus medialis, and vastus lateralis muscles, as well as a decreased RMS% of the rectus femoris muscle. Conversely, RMS% and iEMG values of the biceps femoris, lateral gastrocnemius, and medial gastrocnemius muscles were higher. CONCLUSION The unbalanced activation characteristics of the anterior and posterior muscle groups, combined with changes in joint moment in the three-dimensional plane of the affected joint, may pose a potential risk of injury to the irritated articular cartilage.
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Affiliation(s)
- Jing Pan
- Department of Sports Medicine, Guangzhou Sport University, Guangzhou, 510000, China
| | - Wei Fu
- Department of Sports Medicine, Guangzhou Sport University, Guangzhou, 510000, China
| | - Jinmiao Lv
- Department of Sports Medicine, Guangzhou Sport University, Guangzhou, 510000, China
| | - Huiyi Tang
- Department of Sports Medicine, Guangzhou Sport University, Guangzhou, 510000, China
| | - Zhiguan Huang
- School of Sports and Health, Guangzhou Sport University, Guangzhou, 510000, China
| | - Yu Zou
- Department of Sports Medicine, Guangzhou Sport University, Guangzhou, 510000, China
| | - Xiaohui Zhang
- Department of Sports Medicine, Guangzhou Sport University, Guangzhou, 510000, China.
| | - Bagen Liao
- Department of Sports Medicine, Guangzhou Sport University, Guangzhou, 510000, China.
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de Almeida Nagata C, Hamu TCDDS, Pelicioni PHS, Durigan JLQ, Garcia PA. Influence of lower limb isokinetic muscle strength and power on the occurrence of falls in community-dwelling older adults: A longitudinal study. PLoS One 2024; 19:e0300818. [PMID: 38573888 PMCID: PMC10994367 DOI: 10.1371/journal.pone.0300818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 03/05/2024] [Indexed: 04/06/2024] Open
Abstract
INTRODUCTION Previous studies have highlighted the association between lower limb muscle strength and falls in older adults. However, a comprehensive understanding of the specific influence of each lower limb muscle group on fall occurrences remains lacking. OBJECTIVE This study aimed to investigate the impact of knee, ankle, and hip muscle strength and power on falls in older adults, with the goal of identifying which muscle groups are more predictive of fall risk in this population. METHODS This longitudinal observational study enrolled 94 community-dwelling older adults. Muscle strength and power of the ankle's plantiflexors and dorsiflexors, knee flexors and extensors, and hip flexors, extensors, adductors, and abductors were assessed using a Biodex System 4 Pro® isokinetic dynamometer. Fall occurrences were monitored through monthly telephone contact over a year. RESULTS Participants, with a median age of 69 years (range 64-74), included 67% women, and 63.8% reported a sedentary lifestyle. Among them, 45,7% of older adults were classified as fallers. Comparative analyses revealed that non-fallers displayed significantly superior isokinetic muscle strength in the hip abductors and adductors, along with higher muscle power in the hip abductors, hip flexors, and knee flexors compared to fallers. Multivariate logistic regression analysis indicated that a 1 Nm/Kg increase in hip abductor strength reduced the chance of a fall by 86.3%, and a 1 Watt increase in hip flexor power reduced the chance of a fall by 3.6%. CONCLUSION The findings indicate that hip abductor strength and hip flexor power can be considered protective factors against falls in independent older adults in the community. These findings may contribute to developing effective fall-prevention strategies for this population.
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Affiliation(s)
| | | | - Paulo Henrique Silva Pelicioni
- School of Health Sciences, University of New South Wales, Randwick, NSW, Australia
- Neuroscience Research Australia, University of New South Wales, Randwick, NSW, Australia
| | - João Luiz Quagliotti Durigan
- Universidade de Brasília, Laboratory of Muscle and Tendon Plasticity, Programa de Pós-Graduação em Educação Física, Brasília, DF, Brazil
| | - Patrícia Azevedo Garcia
- Universidade de Brasília, Programa de Pós-Graduação em Ciências da Reabilitação, Brasília, DF, Brazil
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Lima YL, Collings TJ, Hall M, Bourne MN, Diamond LE. Injury Prevention Programmes Fail to Change Most Lower Limb Kinematics and Kinetics in Female Team Field and Court Sports: A Systematic Review and Meta-Analysis of Randomised Controlled Trials. Sports Med 2024; 54:933-952. [PMID: 38044391 DOI: 10.1007/s40279-023-01974-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/13/2023] [Indexed: 12/05/2023]
Abstract
BACKGROUND One mechanism by which exercise interventions may be effective in reducing anterior cruciate ligament (ACL) injury risk is through changes in lower limb biomechanics. Understanding how training programmes affect lower-limb kinematics and kinetics may help refine injury prevention programmes. OBJECTIVE The aim of this systematic review and meta-analysis was to assess the effect of injury prevention programmes on kinematics and kinetics during tasks related to ACL injury in female team field and court sports. DATA SOURCES Five databases were searched in October 2022. ELIGIBILITY CRITERIA Randomised controlled trials assessing the effect of injury prevention programmes compared with usual training/no training on lower limb kinematics and kinetics in female team field and court sports were eligible for review. RESULTS Sixteen studies were included. A total of 976 female athletes were included. Most of the studies included interventions with multiple components (12/16). Commonly used components were plyometrics (12/16), strength (8/16), and balance/stability (7/16). Thirteen studies had routine training or sham interventions as the control group and three studies had no training. Very low certainty evidence suggests that injury prevention programmes increase knee flexion angles (mean difference = 3.1° [95% confidence interval 0.8-5.5]); however, very low to low certainty evidence suggests no effect on hip flexion angles/moments, knee flexion moments, hip adduction angles/moments, knee adduction angles/moments, hip internal rotation angles/moments, ankle dorsiflexion angles, and ground reaction forces, compared with usual training/no training. CONCLUSION Injury prevention programmes may be effective in increasing knee flexion angles during dynamic landing and cutting tasks but may have no effect on other lower limb biomechanical variables. As such, the benefits of injury prevention programmes may be mediated by factors other than altered biomechanics and/or may happen through other biomechanical measures not included in this review.
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Affiliation(s)
- Yuri Lopes Lima
- School of Health Sciences and Social Work, Clinical Sciences G02, Griffith University, Parklands Drive, Southport, QLD, 4215, Australia.
- Griffith Centre of Biomedical and Rehabilitation Engineering (GCORE), Menzies Health Institute Queensland, Griffith University, Southport, Australia.
| | - Tyler J Collings
- School of Health Sciences and Social Work, Clinical Sciences G02, Griffith University, Parklands Drive, Southport, QLD, 4215, Australia
- Griffith Centre of Biomedical and Rehabilitation Engineering (GCORE), Menzies Health Institute Queensland, Griffith University, Southport, Australia
| | - Michelle Hall
- Sydney Musculoskeletal Health, Sydney School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, Australia
| | - Matthew N Bourne
- School of Health Sciences and Social Work, Clinical Sciences G02, Griffith University, Parklands Drive, Southport, QLD, 4215, Australia
- Griffith Centre of Biomedical and Rehabilitation Engineering (GCORE), Menzies Health Institute Queensland, Griffith University, Southport, Australia
| | - Laura E Diamond
- School of Health Sciences and Social Work, Clinical Sciences G02, Griffith University, Parklands Drive, Southport, QLD, 4215, Australia
- Griffith Centre of Biomedical and Rehabilitation Engineering (GCORE), Menzies Health Institute Queensland, Griffith University, Southport, Australia
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Sakaguchi M, Miyai N, Kobayashi H, Arita M. Effect of lower-extremity muscle power training on muscle strength, balance function and walking ability in older adults with heart failure: a randomized controlled trial. Eur Geriatr Med 2024; 15:361-370. [PMID: 38147270 DOI: 10.1007/s41999-023-00905-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Accepted: 11/22/2023] [Indexed: 12/27/2023]
Abstract
PURPOSE This study investigated the combined effect of lower-extremity muscle power training and regular cardiac rehabilitation on muscle strength, balance function, and walking ability of older adults with heart failure. METHODS Thirty-one patients, comprising 17 males and 14 females, aged between 66 and 89 years and diagnosed with non-severe heart failure, were randomly assigned to either the intervention group (n = 15) or control group (n = 16). Both groups participated in a 12-week regular rehabilitation program, with the intervention group receiving additional lower-extremity muscle power training. Various outcome measures, including muscle strength (the five-times-sit-to-stand test and knee extensor peak torque), balance function (Berg balance scale and functional reach test), and walking ability (4-m walk and Timed Up-and-Go tests) were assessed at baseline and 12 weeks after the intervention. RESULTS Of the 31 participants, 27 completed the study protocol. The intervention group demonstrated significantly greater improvement in the five-times-sit-to-stand test time, indicating enhanced lower-extremity muscle power compared to the control group. Both groups showed significant differences in the Berg balance scale, functional reach test, 4-m walk test, and Timed Up-and-Go test between baseline and 12 weeks. However, the effect sizes for the changes during the study period were larger in the intervention group (d = 0.74-1.19) than the control group (d = 0.57-0.96). CONCLUSION Combining lower-extremity muscle power training with regular cardiac rehabilitation may lead to additional improvements in muscle function for older adults with heart failure, resulting in enhanced dynamic balance and walking ability. TRIAL REGISTRATION NUMBER/DATE OF REGISTRATION UMIN000032087/April 4, 2018.
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Affiliation(s)
- Masato Sakaguchi
- Graduate School of Health and Nursing Science, Wakayama Medical University, 580 Mikazura, P.O. Box 641-0011, Wakayama, Japan
- Sumiya Rehabilitation Hospital, Wakayama, Japan
| | - Nobuyuki Miyai
- Graduate School of Health and Nursing Science, Wakayama Medical University, 580 Mikazura, P.O. Box 641-0011, Wakayama, Japan.
| | | | - Mikio Arita
- Sumiya Rehabilitation Hospital, Wakayama, Japan
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Wiprich MT, Eberle EF, Balbinot GF, Cecconi MP, Binotti F, Tadiello GS, Bonetti LV. Evaluation of muscular and functional inter-limb asymmetries during mid-season in young male soccer athletes. J Bodyw Mov Ther 2024; 38:605-614. [PMID: 38763615 DOI: 10.1016/j.jbmt.2024.03.067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 03/09/2024] [Accepted: 03/22/2024] [Indexed: 05/21/2024]
Abstract
BACKGROUND To identify inter-limb asymmetries through the knee's muscular and lower limb functional performance in young male soccer athletes. METHODS Twenty male soccer athletes aged 17 to 19 from an under-20 team performed isokinetic tests at 60°/s., 120°/s., 180°/s., and 240°/s. To assess the knee extensors and flexors muscles and functional tests (hop tests and Y-balance test). RESULTS There were no significant differences between the dominant limb (DL) and non-dominant limb (NDL) in the knee extensors and flexors peak torque and hamstrings (H)/quadriceps(Q) conventional ratio. Moreover, no angular velocities observed inter-limb asymmetries seen by values higher than 10% in the isokinetic parameters. However, the H/Q conventional ratio shows borderline values in low angular velocities (60°/s. and 120°/s.). No significant changes were observed in the functional test performance between the DL and NDL. Furthermore, we did not see inter-limb asymmetries in both hop and Y-balance tests. On the contrary, the anterior distance reached was lower than found in the literature, and the composite score of the Y-balance test demonstrated values below the normative (>94%). CONCLUSION The data demonstrated that soccer athletes have muscular and functional inter-limb symmetry. However, they tend to have knee muscle imbalance in low velocities and dynamic balance deficits that might increase the risk of musculoskeletal injury.
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Affiliation(s)
- Melissa Talita Wiprich
- Postgraduate (Latu Sensu) in Trauma-Orthopedic and Sports Physiotherapy, University of Caxias do Sul, Caxias do Sul, RS, Brazil
| | | | | | | | | | | | - Leandro Viçosa Bonetti
- Department of Physiotherapy, University of Caxias do Sul, Caxias do Sul, RS, Brazil; Postgraduate Program in Health Sciences, University of Caxias do Sul, Caxias do Sul, RS, Brazil.
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22
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Sašek M, Šarabon N, Smajla D. Exploring the relationship between lower limb strength, strength asymmetries, and curvilinear sprint performance: Findings from a pilot study. Sci Prog 2024; 107:368504241247998. [PMID: 38651328 PMCID: PMC11036933 DOI: 10.1177/00368504241247998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
Team sports involve various sprinting actions, including curvilinear sprints, yet their neuromuscular factors have been understudied. The aim of this cross-sectional study was to investigate the relationship between lower limb muscle strength, strength asymmetries, linear sprint and curvilinear sprint performance. At two visits 12 male (age: 24.8 ± 4.7 years, height: 1.82 ± 0.06 m, body mass: 80 ± 6.58 kg) and 6 female (age: 20.8 ± 1.33 years, body height: 1.60 ± 0.02 m, body mass: 55.3 ± 2.88 kg) student-athletes completed isometric strength measurements of the knee flexors (KF), knee extensors (KE), hip abductors (HABD), hip adductors (HADD), as well as linear sprint and curvilinear sprint to the right and left. Sprint split times over 30 m (t30) were measured and curvilinear sprint split time deficits (t30deficit) and inter-limb strength asymmetries were calculated. Very large negative correlations were observed between HADD and HABD strength on one side and t30 of curvilinear sprint to the left (r = -0.75 and -0.71; p < 0.001) and right (ρ = -0.81 and -0.70; p < 0.001) on the other. The regression model consisting of HADD, HABD, and KF explained 76% and 67% of the variance in left and right curvilinear sprint t30, respectively. Similarly, 59% of the left curvilinear sprint t30deficit variance was explained by the HABD and KF strength. High inter-limb HABD strength symmetry was related to better left and right curvilinear sprint t30 (r = 0.71 and ρ = 0.75, p < 0.001). These results highlight the pivotal role of hip strength for curvilinear sprint speed, and emphasize the need of symmetrical HABD muscle strength to optimize neuromuscular function during curvilinear sprint.
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Affiliation(s)
- Matic Sašek
- Faculty of Health Sciences, University of Primorska, Izola, Slovenia
| | - Nejc Šarabon
- Faculty of Health Sciences, University of Primorska, Izola, Slovenia
- Andrej Marušič Institute, University of Primorska, Koper, Slovenia
- Laboratory for Motor Control and Motor Behavior, S2P, Science To Practice, Ltd, Ljubljana, Slovenia
- Ludwig Boltzmann Institute for Rehabilitation Research, Vienna, Austria
| | - Darjan Smajla
- Faculty of Health Sciences, University of Primorska, Izola, Slovenia
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Dury J, Michel F, Ravier G. Electromyographic Activity of Lower Limb Muscles during Ankle Destabilizing Tests. Int J Sports Med 2024; 45:292-300. [PMID: 37871643 DOI: 10.1055/a-2197-1680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
Ankle destabilizing devices were developed to improve the recruitment of the evertor muscles. Nevertheless, the activity of lower-leg muscles has never been compared to each other during functional tests performed with destabilization. The objectives were i) to compare the electromyographic activity between the lower-leg muscles during four functional tests performed with ankle destabilization, and ii) to determine sex-related differences in neuromuscular activation. Twenty-six healthy volunteers (13 males, 13 females) performed the modified Star Excursion Balance Test (mSEBT), unipedal balance and weight-bearing inversion and eversion tests with a destabilizing device, while recording electromyographic activity of the peroneus longus and brevis, tibialis anterior, gastrocnemius lateralis and gluteus medius. The activity of peroneal muscles was significantly greater than other muscles during all functional tests. Furthermore, the anterior direction of the mSEBT was the one implying the greatest activity of the peroneus longus muscle compared to the posteromedial (p=0.003) or posterolateral (p<0.001) directions. Finally, no significant sex-related differences in neuromuscular activity were reported. This study highlights the effectiveness of the destabilizing device to involve specifically the peroneal muscles when performing various functional tests. This device should be used by clinicians to be more specific to the stabilizers of the ankle joint during functional exercises.
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Affiliation(s)
- Jeanne Dury
- Laboratoire C3S UFR STAPS, Université de Franche-Comté, Besancon, France
| | - Fabrice Michel
- Laboratoire de Nanomédecine, Imagerie, Thérapeutique , Université de Franche-Comté, Besancon, France
| | - Gilles Ravier
- Laboratoire C3S UFR STAPS, Université de Franche-Comté, Besancon, France
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Gonçalves MM, Altmann FP, Fortes MDSR, Willardson JM, Miranda H. Comparison of different periodization models on isotonic and isokinetic muscle strength and lean mass in tactical athletes. J Bodyw Mov Ther 2024; 38:306-313. [PMID: 38763574 DOI: 10.1016/j.jbmt.2024.01.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Revised: 11/23/2023] [Accepted: 01/13/2024] [Indexed: 05/21/2024]
Abstract
INTRODUCTION Tactical athletes need to develop strength and lower limb lean mass (LL LM) to perform effectively. Resistance training (RT) is the most effective way to achieve these goals. Two periodization models stand out: traditional linear periodization (TLP) and daily undulating periodization (DUP). OBJECTIVE To verify the effect of lower limb RT with TLP and DUP on isotonic and isokinetic muscle strength and lean mass in tactical athletes. METHOD Thirty-five Brazilian Army military (21.57 ± 2.02 years; 81.81 ± 11.19 Kg; 177.79 ± 6.88 cm) were divided into two treatment groups and one active control group. INTERVENTIONS The treatment groups performed 9 weeks of supervised RT (18 sessions), consisting of free weight exercises in this order: back squat, squat lunge, deadlift, and stiff legged deadlift. Dynamic isotonic muscle strength, lean mass, and isokinetic knee extension and flexion were assessed at baseline and post treatment period. RESULTS There was a significant pre-post difference in dynamic isotonic muscle strength (TLP, P < 0.001; DUP, P < 0.001) and lean mass (TLP, P = 0.034; DUP, P = 0.003) of LL LM in both treatment groups. However, effect sizes (ES) and variations (%Δ) of gains were greater in the DUP group both in muscle strength (TLP, ES = 1.55, %Δ = 30.97; DUP, ES = 2.55, %Δ = 36.02), and in lean mass (TLP, ES = 0.13, %Δ = 2.07; DUP, ES = 0.44, %Δ = 2.95). For isokinetic knee flexion strength, a significant difference was found between the TLP versus CON. CONCLUSION Both lower limb RT periodization models provided gains in muscle strength and lean mass, with a small advantage for the DUP approach. In the isokinetic knee flexion strength, the TLP was more effective.
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Affiliation(s)
- Michel Moraes Gonçalves
- Federal University of Rio de Janeiro, School of Physical Education and Sports, Rio de Janeiro, Brazil; LADTEF - Performance, Training, and Physical Exercise Laboratory, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil; CCFEx - Brazilian Army Physical Training Center, Rio de Janeiro, RJ, Brazil.
| | - Frederico Peter Altmann
- EsEFEx - Brazilian Army Physical Education School, Rio de Janeiro, RJ, Brazil; LABEES - Sport and Exercise Laboratory, State University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | | | - Jeffrey M Willardson
- Health and Human Performance Department, Montana State University Billings, Billings, MT, USA
| | - Humberto Miranda
- Federal University of Rio de Janeiro, School of Physical Education and Sports, Rio de Janeiro, Brazil; LADTEF - Performance, Training, and Physical Exercise Laboratory, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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Elmer DJ, Asbill HW. Effect of cross-slope angle on running economy and gait characteristics at moderate running velocity. Eur J Appl Physiol 2024; 124:1259-1266. [PMID: 37993733 DOI: 10.1007/s00421-023-05358-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 10/28/2023] [Indexed: 11/24/2023]
Abstract
PURPOSE Outdoor running surfaces are designed with a cross-slope, which can alter kinetic and kinematic gait parameters. The purpose of this study was to evaluate running economy, gait characteristics, and muscle activation while running on a surface with cross-slopes similar to those encountered on roads and trails. METHODS Eleven recreational runners (females n = 6) completed 5-min running trials on a treadmill at 10 km h-1 with cross-slopes of 0, 1.15, 2.29, and 6 deg in a randomized order. RESULTS There were no significant differences in VO2, HR, RER, or VE across cross-slope conditions. Compared to 0 deg of cross-slope, ground contact time and duty factor increased at 2.29 and 6 deg, with significant decreases in absolute and relative flight times. Rear foot angles increased in the upslope leg at 2.29 and 6 deg cross-slopes and decreased in the downslope leg at 6 deg compared to 0 deg of cross-slope, with differences between legs for the 2.29 and 6 deg conditions. Knee flexion at foot strike increased in the upslope leg at a 6 deg cross-slope. Vastus lateralis, biceps femoris, gastrocnemius, and tibialis anterior activation were not affected by the cross-slope conditions. While cross-slopes up to 6 deg result in changes to some gait kinematics, these effects do not impact running economy at moderate running velocity.
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Affiliation(s)
- David J Elmer
- Department of Kinesiology, Berry College, 2277 Martha Berry Hwy, Mount Berry, GA, 30149, USA.
| | - Henry W Asbill
- Department of Kinesiology, Berry College, 2277 Martha Berry Hwy, Mount Berry, GA, 30149, USA
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Wang J, Zhang Q, Chen W, Fu H, Zhang M, Fan Y. The effect of flywheel complex training with eccentric-overload on muscular adaptation in elite female volleyball players. PeerJ 2024; 12:e17079. [PMID: 38525282 PMCID: PMC10961060 DOI: 10.7717/peerj.17079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 02/19/2024] [Indexed: 03/26/2024] Open
Abstract
This study aimed to compare the effects of 8 weeks (24 sessions) between flywheel complex training with eccentric overload and traditional complex training of well-trained volleyball players on muscle adaptation, including hypertrophy, strength, and power variables. Fourteen athletes were recruited and randomly divided into the flywheel complex training with an eccentric-overload group (FCTEO, n = 7) and the control group (the traditional complex training group, TCT, n = 7). Participants performed half-squats using a flywheel device or Smith machine and drop jumps, with three sets of eight repetitions and three sets of 12 repetitions, respectively. The variables assessed included the muscle thickness at the proximal, mid, and distal sections of the quadriceps femoris, maximal half-squats strength (1RM-SS), squat jump (SJ), countermovement jump (CMJ), and three-step approach jump (AJ). In addition, a two-way repeated ANOVA analysis was used to find differences between the two groups and between the two testing times (pre-test vs. post-test). The indicators of the FCTEO group showed a significantly better improvement (p < 0.05) in CMJ (height: ES = 0.648, peak power: ES = 0.750), AJ (height: ES = 0.537, peak power: ES = 0.441), 1RM-SS (ES = 0.671) compared to the TCT group and the muscle thicknes at the mid of the quadriceps femoris (ES = 0.504) after FCTEO training. Since volleyball requires lower limb strength and explosive effort during repeated jumps and spiking, these results suggest that FCTEO affects muscular adaptation in a way that improves performance in well-trained female volleyball players.
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Affiliation(s)
- Jiaoqin Wang
- Capital University of Physical Education and Sports, Beijing, China
- Beijing Sport University, Beijing, China
| | - Qiang Zhang
- Capital University of Physical Education and Sports, Beijing, China
| | | | - Honghao Fu
- Huazhong University of Science and Technology, Wuhan, China
| | - Ming Zhang
- Beijing Sport University, Beijing, China
| | - Yongzhao Fan
- Department of Physical Education, Henan Normal University, Xinxiang, China
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Matsuura R. Fatiguing unilateral handgrip influences force during force-matching task with lower limb. Physiol Behav 2024; 275:114455. [PMID: 38161041 DOI: 10.1016/j.physbeh.2023.114455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 12/25/2023] [Accepted: 12/29/2023] [Indexed: 01/03/2024]
Abstract
This study aimed to test the hypotheses that fatiguing unilateral handgrip contraction exhibits different changes in corticomotor excitability, which is evaluated by motor-evoked potentials (MEPs), in the lower limbs ipsilateral and contralateral to the fatigued hand, and that the changes in corticomotor excitability estimated by MEPs in the non-fatigued lower limbs affect the force exerted based on the sense of effort. Ten healthy males completed fatiguing unilateral handgrip contraction and force-matching tasks by static dorsiflexion before, immediately after, and 10 min after handgrip contraction. MEPs in the tibialis anterior (TA) were also measured before, immediately after, and 10 min after handgrip contraction. Fatiguing handgrip contractions resulted in asymmetrical MEPs in the TA muscles. Specifically, MEPs in the contralateral TA muscle were significantly increased (158 ± 60 %) and MEPs in the contralateral TA muscle were greater after the handgrip contraction than the ipsilateral MEPs (111 ± 30 %). Moreover, the torque exerted during the force-matching task significantly increased only in the contralateral ankle after the fatiguing handgrip contraction. Fatiguing unilateral handgrip contraction results in asymmetric changes in corticomotor excitability in the TA muscle, and the force exerted during the force-matching task based on the sense of effort becomes higher in the TA muscle with greater corticomotor excitability than that before fatiguing unilateral handgrip contraction.
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Affiliation(s)
- Ryouta Matsuura
- Graduate School of Education, Joetsu University of Education, 1 Yamayashiki-machi, Joetsu, 943-8512, Japan; Department of Rehabilitation for Movement Functions, Research Institute, National Rehabilitation Center for Persons with Disabilities, 4-1 Namiki, Tokorozawa, 359-8555, Japan.
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Lu Z, Mao C, Tan Y, Liu T, Li X, Li Z, Zhu W, Sun Y. The impact of backpack load on adolescent's stair descent gait. J Biomech 2024; 166:112029. [PMID: 38447428 DOI: 10.1016/j.jbiomech.2024.112029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 02/25/2024] [Accepted: 02/27/2024] [Indexed: 03/08/2024]
Abstract
This study investigates the impact of increasing backpack load on the gait of adolescents during stair descent. Sixteen healthy male students (age = 12.9 ± 0.6 years) were required to descend the stairs in 4 loaded conditions. The kinematic, kinetic, and EMG data were collected synchronously and gait parameters, especially indicators of balance control, were analyzed. The posterior tilt angles (COM-COP IA in the sagittal plane) (0 %-42 %, 48 %-53 %, 58 %-91 %, p < 0.01), trunk anterior tilt angles (9-33 %, 51-65 %, p < 0.01), and CV of stride length (p < 0.01) increased with the backpack load. The COM-Step edge separation decreased with the increased backload (p < 0.01). In addition, the hip flexion torque (25-40 %, 45-51 %, p < 0.01), the rectus femoris activation, and the hip stiffness increased significantly as the load up to 15 % Body Weight (BW)and 20 % BW. The increasing backpack load may affect adolescent's stair descent gait. Especially as the load was up to 15 % BW, the adolescents' bodies tended to tilt backwards relative to the support foot during the single stance phase. They may activate the hip flexors and tilt forward the trunk to recover from the balance perturbation, which was associated with increased hip flexion torques. This adjustment was more pronounced with the increasing backpack load. However, excessive forward flexion may increase the risk of forward falls. The boundaries of adjustment need further research in the future. Findings from this study provide baseline information on the intrinsic mechanisms of balance control during stair descent.
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Affiliation(s)
- Zijun Lu
- Department of Exercise Science, School of Physical Education, Faculty of Sports and Human Sciences, Shaanxi Normal University, Xi'an 710119, China.
| | - Chuangui Mao
- Department of Exercise Science, School of Physical Education, Faculty of Sports and Human Sciences, Shaanxi Normal University, Xi'an 710119, China.
| | - Yuanyuan Tan
- Department of Exercise Science, School of Physical Education, Faculty of Sports and Human Sciences, Shaanxi Normal University, Xi'an 710119, China.
| | - Tao Liu
- Department of Exercise Science, School of Physical Education, Faculty of Sports and Human Sciences, Shaanxi Normal University, Xi'an 710119, China.
| | - Xinglu Li
- Department of Exercise Science, School of Physical Education, Faculty of Sports and Human Sciences, Shaanxi Normal University, Xi'an 710119, China.
| | - Zhengao Li
- Department of Exercise Science, School of Physical Education, Faculty of Sports and Human Sciences, Shaanxi Normal University, Xi'an 710119, China.
| | - Wenfei Zhu
- Department of Exercise Science, School of Physical Education, Faculty of Sports and Human Sciences, Shaanxi Normal University, Xi'an 710119, China.
| | - Yuliang Sun
- Department of Exercise Science, School of Physical Education, Faculty of Sports and Human Sciences, Shaanxi Normal University, Xi'an 710119, China.
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Tsubaki Y, Kawano Y, Lin CF, Kuno-Mizumura M. Laterality in Body Coordination of Professional and Amateur Ballet Dancers While Performing a Single Pirouette with Pointe Shoes. Med Probl Perform Art 2024; 39:8-17. [PMID: 38413826 DOI: 10.21091/mppa.2024.1002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Accepted: 09/07/2023] [Indexed: 02/29/2024]
Abstract
OBJECTIVE Imbalances in muscle strength coordination owing to lateral preference may be a risk factor for injury in dancers. Postural control is essential for the basic turn in ballet (pirouette), owing to its lateral asymmetry. Since dance with pointe shoes demands greater range of motion, muscle strength, and balance control compared to dancing with flat shoes, pointe shoes may further add to the risk and cause an imbalance between the preferred and non-preferred legs during pirouette. In this study, we examined lateral differences in professional and experienced amateur ballet dancers during single pirouettes with pointe shoes to understand the multiple elements involved in lateral balance control in pirouettes. METHODS Eight female professionals and seven female amateur ballet dancers performed single pirouettes in pointe shoes on both the preferred and non-preferred sides. To understand the body coordination laterality in single pirouettes, statistical parametric mapping was performed for the trunk, hip, knee, ankle angle, and center of mass-center of pressure inclination angle timeframe data during the pirouette in three phases: turn with double-leg (Phase 1), single-leg (Phase 2), and finish turning with a single-leg (Phase 3). In addition, the hop-up time was calculated as the percentage when the foot is not in contact with the ground in Phases 2 and 3. RESULTS There were no lateral differences in trunk and lower limb angles in either group. Professional dancers showed slightly more inclination towards the stance leg during left rotation at the beginning of the movement (Phase 1) with longer hop-up time in Phase 2, whereas amateur dancers tended to tilt forward during the left turn (Phases 1 and 2) with longer hop-up time in Phase 3. CONCLUSION It is notable that the COP-COM inclination angle was adjusted by hop-up and it caused the lateral differences in both professional and amateur dancers during a single pirouette with pointe shoes. This study highlights elements to consider in laterality when monitoring pirouette performance with pointe shoes.
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Affiliation(s)
| | | | | | - Mayumi Kuno-Mizumura
- Graduate School of Humanities and Sciences, Ochanomizu University, 2-1-1, Ohtsuka, Bunkyo-ku, Tokyo 112-8610, Japan. Tel +813-5978-5272.
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Brough LG, Neptune RR. A comparison of the effects of mediolateral surface and foot placement perturbations on balance control and response strategies during walking. Gait Posture 2024; 108:313-319. [PMID: 38199090 DOI: 10.1016/j.gaitpost.2023.12.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 11/21/2023] [Accepted: 12/22/2023] [Indexed: 01/12/2024]
Abstract
BACKGROUND Balance perturbation studies during walking have improved our understanding of balance control in various destabilizing conditions. However, it is unknown to what extent balance recovery strategies can be generalized across different types of mediolateral balance perturbations. RESEARCH QUESTION Do similar mediolateral perturbations (foot placement versus surface translation) have similar effects on balance control and corresponding balance response strategies? METHODS Kinetic and kinematic data were previously collected during two separate studies, each with 15 young, healthy participants walking on an instrumented treadmill. In both studies, medial and lateral balance perturbations were applied at 80% of the gait cycle either by a treadmill surface translation or a pneumatic force applied to the swing foot. Differences in balance control (frontal plane whole body angular momentum) and balance response strategies (hip abduction moment, ankle inversion moment, center of pressure excursion and frontal plane trunk moment) between perturbed and unperturbed gait cycles were evaluated using statistical parametric mapping. RESULTS Balance disruptions after foot placement perturbations were larger and sustained longer compared to surface translations. Changes in joint moment responses were also larger for the foot placement perturbations compared to the surface translation perturbations. Lateral hip, ankle, and trunk strategies were used to maintain balance after medial foot placement perturbations, while a trunk strategy was primarily used after surface translations. SIGNIFICANCE Surface and foot placement perturbations influence balance control and corresponding response strategies differently. These results can help inform the development of perturbation-based balance training interventions aimed at reducing fall risk in clinical populations.
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Affiliation(s)
- Lydia G Brough
- Walker Department of Mechanical Engineering, University of Texas at Austin, Austin, TX, USA
| | - Richard R Neptune
- Walker Department of Mechanical Engineering, University of Texas at Austin, Austin, TX, USA.
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Nevin J, Bowling K, Cousens C, Bambrough R, Ramsdale M. The Relationship Between Isometric Midthigh Pull Force-Time Characteristics and 2-km Load-Carrying Performance in Trained British Army Soldiers. J Strength Cond Res 2024; 38:360-366. [PMID: 38258832 DOI: 10.1519/jsc.0000000000004633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
ABSTRACT Nevin, JP, Bowling, K, Cousens, C, Bambrough, R, and Ramsdale, M. The relationship between isometric midthigh pull force-time characteristics and 2-km load-carrying performance in trained British army soldiers. J Strength Cond Res 38(2): 360-366, 2024-Load carriage is a fundamental military occupational task. As such, the aim of this study was to assess the relationship between isometric force-time characteristics and loaded march performance. Furthermore, this study aimed to investigate the relationship between isometric force-time characteristics and standing long jump (SLJ) performance. Thirty-nine, full-trained, male British Army infantry soldiers (age 31 ± 6.1 years; height 176 ± 7.3 cm; body mass 85.8 ± 11.5 kg) performed three isometric midthigh pull trials, three SLJ trials, and a 2-km loaded march carrying an external load of 25 kg. Both the isometric midthigh pull test (intraclass correlation coefficient [ICC] 0.965) and SLJ (ICC 0.916) demonstrated excellent reliability. Relationships between all variables were assessed using Pearson's correlation coefficient. Isometric peak force (r = -0.059), relative peak force (r = -0.135), and rate of force development (r = -0.162) displayed a small correlation with loaded march time to completion. However, isometric relative peak force displayed a large relationship with SLJ performance (r = 0.545; p = <0.01). Our data demonstrate that isometric lower-limb strength measures account for <2% of the total variance observed in 2-km loaded march performance. As such, the use of isometric lower-limb force-time characteristics as a proxy measure of load-carrying ability should be questioned. However, relative isometric strength seems to demonstrate a significant relationship with SLJ performance. As such, isometric testing may have utility in regard to assessing explosive strength, monitoring neuromuscular fatigue, and assessing training readiness in military populations.
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Affiliation(s)
- Jonpaul Nevin
- Buckinghamshire New University, High Wycombe, United Kingdom
| | - Kim Bowling
- Royal Army Physical Training Corps, United Kingdom; and
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Obst SJ, Peterson B, Heales LJ. Maximal Lower Limb Strength in Patellar Tendinopathy: A Systematic Review With Meta-Analysis. J Athl Train 2024; 59:159-172. [PMID: 37071550 PMCID: PMC10895401 DOI: 10.4085/1062-6050-0662.22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
Abstract
OBJECTIVE To investigate whether lower limb strength is reduced in people with patellar tendinopathy (PT) compared with asymptomatic control individuals or the asymptomatic contralateral limb. DATA SOURCES MEDLINE, PubMed, Scopus, and Web of Science. STUDY SELECTION To be included in the systematic review and meta-analysis, studies were required to be peer reviewed, published in the English language, and case control investigations; include participants with a clinical diagnosis of PT and an asymptomatic control or contralateral limb group; and include an objective measure of lower limb maximal strength. DATA EXTRACTION We extracted descriptive statistics for maximal strength for the symptomatic and asymptomatic limbs of individuals with PT and the limb(s) of the asymptomatic control group, inferential statistics for between-groups differences, participant characteristics, and details of the strength-testing protocol. The risk of bias was assessed using the Joanna Briggs Institute critical appraisal tool for analytical cross-sectional studies. DATA SYNTHESIS Of the 23 included studies, 21 reported knee strength, 3 reported hip strength, and 1 reported ankle strength. Random-effects models (Hedges g) were used to calculate the pooled effect sizes (ESs) of muscle strength according to the direction of joint movement and type of contraction. The pooled ESs (95% CI) for maximal voluntary isometric contraction knee-extension strength, concentric knee-extension strength, and concentric knee-flexion strength were 0.54 (0.27, 0.80), 0.78 (0.30, 1.33), and 0.41 (0.04, 0.78), respectively, with all favoring greater strength in the asymptomatic control group. Researchers of 2 studies described maximal eccentric knee-extensor strength with no differences between the PT and asymptomatic control groups. In 3 studies, researchers measured maximal hip strength (abduction, extension, and external rotation), and all within-study ESs favored greater strength in the asymptomatic control group. CONCLUSIONS Isometric and concentric knee-extensor strength are reduced in people with PT compared with asymptomatic control individuals. In contrast, evidence for reduced eccentric knee-extension strength in people with PT compared with asymptomatic control individuals is limited and inconsistent. Although evidence is emerging that both knee-flexion and hip strength may be reduced in people with PT, more examination is needed to confirm this observation.
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Affiliation(s)
- Steven J Obst
- Musculoskeletal Health and Rehabilitation Research Group, School of Health, Medical and Applied Sciences, Central Queensland University, Bundaberg, Australia
| | - Benjamin Peterson
- Musculoskeletal Health and Rehabilitation Research Group, School of Health, Medical and Applied Sciences, Central Queensland University, Rockhampton, Australia
| | - Luke J Heales
- Musculoskeletal Health and Rehabilitation Research Group, School of Health, Medical and Applied Sciences, Central Queensland University, Rockhampton, Australia
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Keller S, Olstad BH, Wahl P. Lower and upper extremity contributions to propulsion and resistance during semi-tethered load-velocity profiling in front crawl swimming. J Sports Sci 2024; 42:215-221. [PMID: 38449095 DOI: 10.1080/02640414.2024.2326347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Accepted: 02/25/2024] [Indexed: 03/08/2024]
Abstract
The study estimated lower and upper extremity contributions to whole-body front crawl swimming using semi-tethered load-velocity profiling. Nine female and 11 male (inter)national-level swimmers performed 20 m semi-tethered sprints, each with five progressive loads for lower (leg kicking), upper (arm stroke), and whole-body front crawl movements. The theoretical maximal speed (v0) and load (L0), and active drag (Da) were expressed as a percentage of the sum of both extremities for the movements of each extremity to calculate their contributions. The difference of whole-body values minus the sum of both extremities was used to estimate whole-body reserves. Lower (upper) body contributions were 43.8 ± 2.8% (56.2%) for v0, 37.3 ± 7.1% (62.7%) for L0, and 39.6 ± 5.6% (60.4%) for Da. Statistically significant whole-body reserves were found for v0 (-30.9 ± 3.9%, p < 0.001) and Da (-5.7 ± 11.7%, p = 0.04). V0 reserves correlated very highly with whole-body v0 in males (r = 0.71, p = 0.014) and moderately in females (r = 0.47, p = 0.21). The lower extremities contribute substantially to front crawl load-velocity profiles of highly trained swimmers. Higher sprint swimming speeds are associated with an efficient speed transfer from lower- and upper- to whole-body movement.
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Affiliation(s)
- Sebastian Keller
- Section Exercise Physiology, German Sport University Cologne, Cologne, Germany
- The German Research Centre of Elite Sport Cologne, German Sport University Cologne, Cologne, Germany
| | - Bjørn Harald Olstad
- Department of Physical Performance, Norwegian School of Sport Sciences, Oslo, Norway
| | - Patrick Wahl
- Section Exercise Physiology, German Sport University Cologne, Cologne, Germany
- The German Research Centre of Elite Sport Cologne, German Sport University Cologne, Cologne, Germany
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Wang W, Qiu F, Han Y, Li X, Komnik I, Viellehner J, Wang S, Potthast W. The effect of marathon running on the lower extremity kinematics and muscle activities during walking and running tasks. J Sports Sci 2024; 42:365-372. [PMID: 38507567 DOI: 10.1080/02640414.2024.2332865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 03/13/2024] [Indexed: 03/22/2024]
Abstract
Patellofemoral pain syndrome (PFPS) is a common injury among runners, and it is thought that abnormal lower extremity biomechanics contribute to its development. However, the relationship between biomechanical changes after a marathon and PFPS injury remains limited. This study aims to investigate whether differences in knee and hip kinematics and lower extremity muscle activities exist in recreational runners before and after a marathon. Additionally, it aims to explore the relationship between these biomechanical changes and the development of PFPS injury. 12 recreational runners participated in the study. Kinematics and muscle activities of the lower extremity were recorded during walking (5 km/h) and running (10 km/h) tasks within 24 hours before and within 5 hours after a marathon. After the marathon, there was a significant decrease in peak knee flexion (walking: p = 0.006; running: p = 0.006) and an increase in peak hip internal rotation (walking: p = 0.026; running: p = 0.015) during the stance phase of both walking and running compared to before the marathon. The study demonstrates a decrease in knee flexion and an increase in hip internal rotation during the stance phase of gait tasks after completing a marathon, which may increase the risk of developing PFPS injury.
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Affiliation(s)
- Wenjin Wang
- Institute of Biomechanics and Orthopedics, German Sport University Cologne, Cologne, Germany
- Key Laboratory of Exercise and Health Sciences of Ministry of Education, School of Kinesiology, Shanghai University of Sport, Shanghai, China
| | - Fanghui Qiu
- Department of Physical Education, Qingdao University, Qingdao, China
| | - Yongjie Han
- Key Laboratory of Exercise and Health Sciences of Ministry of Education, School of Kinesiology, Shanghai University of Sport, Shanghai, China
- Laboratory of Biomechanics and Engineering, Innomotion, Shanghai, China
| | - Xiangming Li
- Key Laboratory of Exercise and Health Sciences of Ministry of Education, School of Kinesiology, Shanghai University of Sport, Shanghai, China
| | - Igor Komnik
- Institute of Biomechanics and Orthopedics, German Sport University Cologne, Cologne, Germany
| | - Josef Viellehner
- Institute of Biomechanics and Orthopedics, German Sport University Cologne, Cologne, Germany
| | - Shaobai Wang
- Key Laboratory of Exercise and Health Sciences of Ministry of Education, School of Kinesiology, Shanghai University of Sport, Shanghai, China
- Laboratory of Biomechanics and Engineering, Innomotion, Shanghai, China
| | - Wolfgang Potthast
- Institute of Biomechanics and Orthopedics, German Sport University Cologne, Cologne, Germany
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Sadeh S, Shen KH, Foroughi F, Hsiao HY. Leading limb biomechanical response following compelled forward and descending body shift in old versus young adults. Clin Biomech (Bristol, Avon) 2024; 112:106169. [PMID: 38211422 DOI: 10.1016/j.clinbiomech.2024.106169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 12/08/2023] [Accepted: 01/04/2024] [Indexed: 01/13/2024]
Abstract
BACKGROUND Falls pose a significant health risk in older adults, with stair descent falls carrying particularly severe consequences. Reduced balance control and limb support due to aging-related physiological and neuromuscular decline are critical components in increased falling risk in older adults. Understanding the age-associated abnormalities in balance control and limb support strategies during sudden forward and downward body shift could reveal potential biomechanical deficits responsible for increased falling risks in older adults. This study investigates balance regulatory responses following first-time exposure to compelled forward and downward body shift in young and older adults. METHODS Thirteen healthy old and thirteen healthy young adults participated in this study. Participants stood on two adjacent perturbation platforms in modified tandem stance. The leading limb support surface dropped 3 in. vertically at an unknown time. The anterior margin of stability and center of mass velocity, peak vertical ground reaction forces, and leading limb ankle and knee joint angular displacement, torque, and power during the initial response phase were compared between age groups. FINDINGS Compared to young adults, older adults showed higher center of mass velocity, lower margin of stability, peak vertical ground reaction force, peak ankle and knee joint power, and peak knee joint torque during the initial response phase. INTERPRETATIONS The abnormalities potentially identified in our study, particularly in dynamic stability regulation, limb support force generation, and shock absorption may affect the ability to arrest the body's forward and downward motion. These deficits may contribute to an increased risk of forward falls in aging.
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Affiliation(s)
- Soroosh Sadeh
- Department of Kinesiology and Health Education, University of Texas at Austin, Austin, TX, USA.
| | - Keng-Hung Shen
- Department of Kinesiology and Health Education, University of Texas at Austin, Austin, TX, USA.
| | - Forouzan Foroughi
- Department of Kinesiology and Health Education, University of Texas at Austin, Austin, TX, USA.
| | - Hao-Yuan Hsiao
- Department of Kinesiology and Health Education, University of Texas at Austin, Austin, TX, USA.
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Hou Z, Shen W, Fong DTP, Winter SL. Anticipation of landing leg masks ankle inversion orientation deficits and peroneal insufficiency during jump landing in people with chronic ankle instability. Scand J Med Sci Sports 2024; 34:e14585. [PMID: 38356438 DOI: 10.1111/sms.14585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 12/20/2023] [Accepted: 01/29/2024] [Indexed: 02/16/2024]
Abstract
Ankle inversion orientation and peroneal activation insufficiency may contribute to lateral ankle sprains during landing in chronic ankle instability (CAI); however, how anticipation alters these factors is neglected. This study aimed to assess the impact of anticipation on joint orientation and muscle activity during landing in individuals with CAI. Fifteen participants with CAI and 15 healthy participants (control) were recruited to perform single-leg landings after bilateral countermovement jumps when the landing limb was specified before (planned) or after (unplanned) take-off. Joint angle (hip, knee, and ankle) and electromyography (gluteus medius, rectus femoris, biceps femoris, gastrocnemius lateral head, tibialis anterior, and peroneal longus) were collected and analyzed with 2 (groups) × 2 (conditions) statistical parametric mapping ANOVA. In the unplanned condition, the CAI group demonstrated a less plantarflexed (maximum difference [MD] = 9.5°, p = 0.047) and more inverted ankle joint (MD = 4.1°, p < 0.001) before ground contact, along with lower peroneal activity at ground contact compared to the control group (MD = 28.9% of peak activation, p < 0.001). No significant differences between groups were observed in the planned condition. In conclusion, anticipation may mask jump landing deficits in people with CAI, including inverted ankle orientation and reduced peroneus longus activity pre- and post-landing, which were observed exclusively in unplanned landings. Clinicians and researchers need to recognize the impact of anticipation on apparent landing deficits and consider the implications for injury prevention and rehabilitation strategies.
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Affiliation(s)
- Zongchen Hou
- National Centre for Sport and Exercise Medicine, School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
| | - Wei Shen
- National Centre for Sport and Exercise Medicine, School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
| | - Daniel T P Fong
- National Centre for Sport and Exercise Medicine, School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
| | - Samantha L Winter
- National Centre for Sport and Exercise Medicine, School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
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Sánchez-Morales S, Gutiérrez-Martín B, Ibáñez-Vera AJ, Rodríguez-Almagro D, Pecos-Martín D, Achalandabaso-Ochoa A. Effectiveness of a specific strength program of the gluteus maximus muscle to improve dynamic postural control in female basketball players. A randomized controlled trial. Gait Posture 2024; 108:90-96. [PMID: 38016398 DOI: 10.1016/j.gaitpost.2023.11.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 11/02/2023] [Accepted: 11/15/2023] [Indexed: 11/30/2023]
Abstract
BACKGROUND Basketball is a team sport in which players perform multidirectional movements, jumps and landings, experiencing abrupt accelerations and decelerations and numerous changes of rhythm. In this sport, speed and intensity are two key factors that are associated with an increased risk of injury. The aim of this randomized controlled trial was to determine the effectiveness of a specific gluteus maximus strength programme as preventive work for young female basketball players, to improve dynamic postural stability and to observe its impact in the rate of lower limb injuries, vertical jump, dynamic knee valgus and pain. RESEARCH QUESTION Is effective a strength programme to improve dynamic postural stability, vertical jump and dynamic valgus in female basketball players? METHODS A hundred and thirteen female basketball players that play in professional clubs were recruited, reaching the final stage 92 (46 per group). One group (CG) received conventional injury prevention training while the experimental group (EG) added to the conventional team prevention program, a gluteus maximus strength programme of 5 months composed of 4 exercises/2 days per week/2 sets of 10 repetitions per leg. RESULTS The total injury incidence decreased from 0.33 to 0.16 cases (control group pre=0.43 to post=0.14 cases, EG pre=022 to post=0.19). The EG improved overall (p = 0.000), posterior (p = 0.001), posteromedial (p = 0.001) and posterolateral (p = 0.000) dynamic stability of the right leg; anterior (p = 0.024), medial (p = 0.07) and posteromedial (p = 0.01) of the left leg. Both groups improved vertical jump (GC: p = 0.045 and GE: p = 0.000). There was no significant improvement in pain or valgus. SIGNIFICANCE This strength programme is effective in improving dynamic stability especially of the dominant leg and jump height.
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Affiliation(s)
- Sandra Sánchez-Morales
- Physiotherapy and Pain Group, Department of Physical Therapy, University of Alcala, Madrid, Spain
| | - Belén Gutiérrez-Martín
- Physiotherapy and Pain Group, Department of Physical Therapy, University of Alcala, Madrid, Spain
| | | | | | - Daniel Pecos-Martín
- Physiotherapy and Pain Group, Department of Physical Therapy, University of Alcala, Madrid, Spain
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Bloch AE, Steckenrider JJ, Zifchock RA, Freisinger GM, Bode VG, Elkin-Frankston S. Effect of Fatigue on Movement Patterns During a Loaded Ruck March. Mil Med 2024; 189:e15-e20. [PMID: 37083060 DOI: 10.1093/milmed/usad086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 02/21/2023] [Accepted: 04/12/2023] [Indexed: 04/22/2023] Open
Abstract
INTRODUCTION Loaded ruck marching is a common training and operational task for many members of the military. It is known to cause fatigue, affect soldier readiness, and can lead to traumatic and overuse injuries. Quantifying the gait changes that occur over the course of a loaded ruck march may provide a better understanding of injury mechanisms and potentially allow for development of individualized injury-prevention training programs. This study examined the change in soldiers' gait patterns over the course of a loaded ruck march in order to examine the correlation between fatigue and kinematic parameters. Fatigue is a subjective term that may encompass factors such as energy expenditure, muscle exhaustion, and cognitive engagement. Since it can be difficult to quantify, the current study makes the broad assumption that fatigue increases in some (potentially nonlinear) fashion during a loaded ruck march. METHOD Three platoons of soldiers participated in a field training exercise with inertial measurement sensors placed on their chests and ankles to record gait parameters throughout a 7-mile ruck march. The effects of fatigue on stride length, stride width, ankle yaw, and torso lean (anterior-posterior [AP] and side-to-side [SS]) were compared using one-way repeated measure analyses of variance. RESULTS In comparing the first and last quarters of the ruck march, stride length decreased, stride width increased, stride width variability increased, AP torso lean variability increased, and SS torso lean variability increased. CONCLUSION Although they do not describe a direct relationship to injury, these results can inform enhanced approaches to quantify and predict soldier fatigue and more reliably prevent future injury.
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Affiliation(s)
- Audra E Bloch
- Department of Civil & Mechanical Engineering, U.S. Military Academy, West Point, NY 10996, USA
| | - J Josiah Steckenrider
- Department of Civil & Mechanical Engineering, U.S. Military Academy, West Point, NY 10996, USA
| | - Rebecca A Zifchock
- Department of Civil & Mechanical Engineering, U.S. Military Academy, West Point, NY 10996, USA
| | - Gregory M Freisinger
- Department of Civil & Mechanical Engineering, U.S. Military Academy, West Point, NY 10996, USA
- 75th Innovation Command, US Army Reserve, Houston, TX 77034, USA
| | - Victoria G Bode
- Combat Capabilities Development Command Soldier Center, Natick, MA 01760, USA
| | - Seth Elkin-Frankston
- Combat Capabilities Development Command Soldier Center, Natick, MA 01760, USA
- Center for Applied Brain and Cognitive Sciences, Tufts University of Engineering, Medford, MA 20817, USA
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Zhang X, Feng H, Liu X, Gao P, Guo P, Tang S, Nie X, Feng T, Liu W. Biomechanical characterization of firefighters running under different rescue tasks. Sci Rep 2024; 14:1813. [PMID: 38245640 PMCID: PMC10799886 DOI: 10.1038/s41598-024-52440-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 01/18/2024] [Indexed: 01/22/2024] Open
Abstract
The biomechanical characteristics of runs in firefighters with different rescue tasks are unclear. This study aimed to explore the biomechanical characteristics of firefighters running in different rescue tasks and provide theoretical and practical references for firefighter training and occupational injury prevention. Eighteen professional healthy male firefighters were randomly selected as participants and tested running on different rescue tasks: wearing firefighting protective clothing (FPC), FPC+carrying a gas can (20 kg, FPC+ C), and FPC+carrying a mannequin (60 kg, FPC+M). Eight Qualisys infrared cameras and an AMTI 3D force measurement platform were used for the participant's acquisition of lower limb kinematic/kinetic data. The results showed that gait velocity and stride length of the FPC+GC and FPC+ M rescue tasks were significantly decreased compared to the FPC rescue task, while the support time was significantly increased. Compared to the FPC rescue task, the FPC+GC rescue task showed significant decreases in vertical ground reaction force (vGRF), minimum ankle dorsiflexion angle, and the maximum ankle plantarflexion power. In contrast, the FPC+M rescue task demonstrated significant increases in ankle range of motion, maximum hip extension angle, minimum knee flexion angle, maximum ankle dorsiflexion angle, maximum hip extension moment, maximum knee flexion moment, maximum hip flexion power, and hip and knee stiffness while exhibiting significant decreases in minimum ankle dorsiflexion angle. Compared to the FPC+ GC rescue task, the FPC+M rescue task exhibited significant increases in the maximum hip extension angle, minimum knee flexion angle, maximum ankle dorsiflexion angle, maximum hip flexion moment, maximum hip extension moment, maximum knee flexion moment, maximum ankle plantarflexion moment, maximum hip flexion power, maximum ankle dorsiflexion power, hip stiffness, and vGRF. Conversely, it showed significant decreases in the maximum knee flexion power. In conclusion, compared to the FPC rescue task, the FPC+GC and FPC+M rescue tasks altered the firefighter's gait performance, as evidenced by decreased gait velocity and stride length and increased support time. FPC+M rescue task would increase firefighter's risk of hip and knee injuries. Therefore, we suggest firefighters increase their strength training of the trunk, hip, and knee joint muscles as part of their daily training programs under large weight load status (60 kg and above) to reduce injury risk during rescue tasks.
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Affiliation(s)
- Xinxin Zhang
- College of Physical Education and Health, Guangxi Normal University, Guilin, 541004, China
| | - Haili Feng
- College of Physical Education and Health, Guangxi Normal University, Guilin, 541004, China
| | - Xindai Liu
- College of International Culture and Education, Guangxi Normal University, Guilin, 541004, China
| | - Pincao Gao
- College of Physical Education and Health, Guangxi Normal University, Guilin, 541004, China
| | - Peng Guo
- Guilin Yanshan District Fire Rescue Brigade, Guilin, 541004, China
| | - Shenghui Tang
- Guilin Yanshan District Fire Rescue Brigade, Guilin, 541004, China
| | - Xinhe Nie
- College of Physical Education and Health, Guangxi Normal University, Guilin, 541004, China
| | - Tianjin Feng
- College of Cotinuing Education, Guilin Medical University, Guilin, 541004, China.
| | - Weiguo Liu
- College of Physical Education and Health, Guangxi Normal University, Guilin, 541004, China.
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Bing F, Zhang G, Wang Y, Zhang M. Effects of workload and saddle height on muscle activation of the lower limb during cycling. Biomed Eng Online 2024; 23:6. [PMID: 38229090 DOI: 10.1186/s12938-024-01199-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 01/04/2024] [Indexed: 01/18/2024] Open
Abstract
BACKGROUND Cycling workload is an essential factor in practical cycling training. Saddle height is the most studied topic in bike fitting, but the results are controversial. This study aims to investigate the effects of workload and saddle height on the activation level and coordination of the lower limb muscles during cycling. METHODS Eighteen healthy male participants with recreational cycling experience performed 15 × 2-min constant cadence cycling at five saddle heights of 95%, 97%, 100%, 103%, and 105% of greater trochanter height (GTH) and three cycling workloads of 25%, 50%, and 75% of functional threshold power (FTP). The EMG signals of the rectus femoris (RF), tibialis anterior (TA), biceps femoris (BF), and medial gastrocnemius (MG) of the right lower limb were collected throughout the experiment. RESULTS Greater muscle activation was observed for the RF and BF at a higher cycling workload, whereas no differences were observed for the TA and MG. The MG showed intensified muscle activation as the saddle height increased. The mean and maximum amplitudes of the EMG signals of the MG increased by 56.24% and 57.24% at the 25% FTP workload, 102.71% and 126.95% at the 50% FTP workload, and 84.27% and 53.81% at the 75% FTP workload, respectively, when the saddle height increased from 95 to 100% of the GTH. The muscle activation level of the RF was minimal at 100% GTH saddle height. The onset and offset timing revealed few significant differences across cycling conditions. CONCLUSIONS Muscle activation of the RF and BF was affected by cycling workload, while that of the MG was affected by saddle height. The 100% GTH is probably the appropriate saddle height for most cyclists. There was little statistical difference in muscle activation duration, which might be related to the small workload.
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Affiliation(s)
- Fangbo Bing
- Department of Biomedical Engineering, Faculty of Engineering, The Hong Kong Polytechnic University, Hong Kong SAR, 999077, China
| | - Guoxin Zhang
- Department of Biomedical Engineering, Faculty of Engineering, The Hong Kong Polytechnic University, Hong Kong SAR, 999077, China
| | - Yan Wang
- Department of Biomedical Engineering, Faculty of Engineering, The Hong Kong Polytechnic University, Hong Kong SAR, 999077, China
- Research Institute for Sports Science and Technology, The Hong Kong Polytechnic University, Hong Kong SAR, 999077, China
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, 518057, China
| | - Ming Zhang
- Department of Biomedical Engineering, Faculty of Engineering, The Hong Kong Polytechnic University, Hong Kong SAR, 999077, China.
- Research Institute for Sports Science and Technology, The Hong Kong Polytechnic University, Hong Kong SAR, 999077, China.
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, 518057, China.
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Tian D, Li W, Li J, Li F, Chen Z, He Y, Sun J, Wu X. Self-Balancing Exoskeleton Robots Designed to Facilitate Multiple Rehabilitation Training Movements. IEEE Trans Neural Syst Rehabil Eng 2024; 32:293-303. [PMID: 38163311 DOI: 10.1109/tnsre.2023.3348985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
This study presents the biomimetic design of the structure and controller of AutoLEE-II, a self-balancing exoskeleton developed to assist patients in performing multiple rehabilitation movements without crutches or other supporting equipment. Its structural design is founded upon the human body structure, with an eliminated axis deviation and a raised CoM of the exoskeleton. The controller is a physical parameter-independent controller based on the CoM modification. Thus, the exoskeleton can adapt to patients with different physical parameters. Five subjects underwent exoskeleton-assisted rehabilitation training experiments, including squatting, tilting, and walking trainings. The results showed that the exoskeleton can assist patients in completing various rehabilitation exercises and help them maintain their balance during the rehabilitation training. This helpful role of the exoskeleton in rehabilitation training is analyzed through an electromyography (EMG) data analysis. The findings revealed that wearing the exoskeleton can reduce the activity of the lower limb muscles by approximately 20-30% when performing the same rehabilitation exercises.
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Ma S, Xu S, Song J, Wang K, Qin H, Wang R. Study on driver's active emergency response in dangerous traffic scenes based on driving simulator. Traffic Inj Prev 2024; 25:116-121. [PMID: 38019530 DOI: 10.1080/15389588.2023.2282948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 11/09/2023] [Indexed: 11/30/2023]
Abstract
OBJECTIVE A driver's active emergency response in dangerous traffic scenes consists of two parts, including reaction behavior and physiological state. In dangerous traffic scenes, the driver's active emergency response has an important impact on human collision injury. Clarifying the driver's active emergency response is an important prerequisite for the study of human collision injury under nonstandard posture. Therefore, this study investigates the driver's active emergency response in different inevitable collision scenes using driving simulator. METHODS A driving simulator with a high-speed camera system and human physiological signal acquisition system was first built. Then, three typical vehicle dangerous collision scenes were developed, including frontal collision, side collision, and rear-end collision. Finally, twenty participants (15 males and 5 females) were recruited for a driving experiment, and their active emergency responses were recorded and analyzed. RESULTS All subjects would rotate the steering wheel to the left or right in the active emergency state, and the rotation of the hand would also cause the subject's upper body to tilt in the same direction. The maximum angle for male subjects to rotate the steering wheel was 59.98°, while for the female subjects, it was 44.28°. In addition, the maximum grip force between the male subjects and the steering wheel was 280.5 N, compared to 192.5 N for female subjects. Compared to the female participants, the male participants not only have a greater rotation angle and a greater grip force on the steering wheel, but also have greater pressure on the brake pedal, and the foot moves quickly from the accelerator pedal to the brake pedal and presses the brake pedal. CONCLUSIONS Drivers have different active emergency responses to different vehicle collision scenes. Quantitative statistics of driver's active emergency response will have important guiding significance for the analysis of the impact of human active emergency response on human injury characteristics in subsequent vehicle collision experiments.
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Affiliation(s)
- Shuai Ma
- School of Vehicle and Mobility, Tsinghua University, Beijing, China
- Suzhou Automobile Research Institute (Xiang Cheng), Tsinghua University, Suzhou, China
| | - Shucai Xu
- School of Vehicle and Mobility, Tsinghua University, Beijing, China
- Suzhou Automobile Research Institute (Xiang Cheng), Tsinghua University, Suzhou, China
| | - Jiafeng Song
- School of Vehicle and Mobility, Tsinghua University, Beijing, China
- Suzhou Automobile Research Institute (Xiang Cheng), Tsinghua University, Suzhou, China
| | - Kejun Wang
- Suzhou Automobile Research Institute (Xiang Cheng), Tsinghua University, Suzhou, China
- Jiangsu Provincial Key Laboratory of Advanced Robotics, Soochow University, Suzhou, China
| | - Haoyi Qin
- Suzhou Automobile Research Institute (Xiang Cheng), Tsinghua University, Suzhou, China
| | - Ruixiang Wang
- Suzhou Automobile Research Institute (Xiang Cheng), Tsinghua University, Suzhou, China
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Takada H, Yamashita K, Osawa L, Komiyama Y, Muraoka M, Suzuki Y, Sato M, Kobayashi S, Yoshida T, Takano S, Maekawa S, Enomoto N. Assessment of lower limb muscle strength can predict fall risk in patients with chronic liver disease. Sci Rep 2024; 14:64. [PMID: 38168920 PMCID: PMC10761732 DOI: 10.1038/s41598-023-50574-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 12/21/2023] [Indexed: 01/05/2024] Open
Abstract
Falls are caused by a combination of factors, including loss of lower limb muscle strength (LMS), and associated with declined performance status (PS). Age-related sarcopenia is generally associated with decreased muscle mass and strength of lower limb muscle but without a noticeable loss of those of upper limb or trunk muscle. However, no reports have focused on falls or LMS in chronic liver disease (CLD) patients. This study is the first to analyze the risk factors for falls in patients with CLD, focusing on LMS measurement using the Locomoscan. This study enrolled 315 CLD patients whose LMS was measured. The patients who experienced falls more than 1 year ago or during the observation period were classified as those who experienced falls. We found that risk factors for falls were PS1/2 and decreased LMS (< 0.32 N/kg). The group with sarcopenia had a higher frequency of decreased LMS (54 vs. 26%, p = 0.001) and falls (24 vs. 4.4%, p < 0.001) compared to the non-sarcopenia group. This study found that decreased LMS was an independent risk factor for falls. Assessment of LMS may be used as a better marker associated with the risk of falls in patients with CLD.
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Affiliation(s)
- Hitomi Takada
- Gastroenterology and Hepatology Department of Internal Medicine, Faculty of Medicine, University of Yamanashi, Shimokato 1110, Chuo, Yamanashi, 409-3898, Japan.
| | - Koji Yamashita
- Gastroenterology and Hepatology Department of Internal Medicine, Faculty of Medicine, University of Yamanashi, Shimokato 1110, Chuo, Yamanashi, 409-3898, Japan
| | - Leona Osawa
- Gastroenterology and Hepatology Department of Internal Medicine, Faculty of Medicine, University of Yamanashi, Shimokato 1110, Chuo, Yamanashi, 409-3898, Japan
| | - Yasuyuki Komiyama
- Gastroenterology and Hepatology Department of Internal Medicine, Faculty of Medicine, University of Yamanashi, Shimokato 1110, Chuo, Yamanashi, 409-3898, Japan
| | - Masaru Muraoka
- Gastroenterology and Hepatology Department of Internal Medicine, Faculty of Medicine, University of Yamanashi, Shimokato 1110, Chuo, Yamanashi, 409-3898, Japan
| | - Yuichiro Suzuki
- Gastroenterology and Hepatology Department of Internal Medicine, Faculty of Medicine, University of Yamanashi, Shimokato 1110, Chuo, Yamanashi, 409-3898, Japan
| | - Mitsuaki Sato
- Gastroenterology and Hepatology Department of Internal Medicine, Faculty of Medicine, University of Yamanashi, Shimokato 1110, Chuo, Yamanashi, 409-3898, Japan
| | - Shoji Kobayashi
- Gastroenterology and Hepatology Department of Internal Medicine, Faculty of Medicine, University of Yamanashi, Shimokato 1110, Chuo, Yamanashi, 409-3898, Japan
| | - Takashi Yoshida
- Gastroenterology and Hepatology Department of Internal Medicine, Faculty of Medicine, University of Yamanashi, Shimokato 1110, Chuo, Yamanashi, 409-3898, Japan
| | - Shinichi Takano
- Gastroenterology and Hepatology Department of Internal Medicine, Faculty of Medicine, University of Yamanashi, Shimokato 1110, Chuo, Yamanashi, 409-3898, Japan
| | - Shinya Maekawa
- Gastroenterology and Hepatology Department of Internal Medicine, Faculty of Medicine, University of Yamanashi, Shimokato 1110, Chuo, Yamanashi, 409-3898, Japan
| | - Nobuyuki Enomoto
- Gastroenterology and Hepatology Department of Internal Medicine, Faculty of Medicine, University of Yamanashi, Shimokato 1110, Chuo, Yamanashi, 409-3898, Japan
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Park TS, Shin MJ, Kang JH. Differences in muscle activity during squat exercises according to the knee angle and standing angle of a sliding tilt table: A comparative study. Physiother Res Int 2024; 29:e2050. [PMID: 37787665 DOI: 10.1002/pri.2050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 07/31/2023] [Accepted: 09/17/2023] [Indexed: 10/04/2023]
Abstract
BACKGROUND AND PURPOSE Weight-bearing exercises can help improve physical function; however, they may be difficult to perform in patients with neurological issues or lower limb fractures. The purpose of this study was to evaluate the activity of the leg muscles during squatting when using a new exercise aid designed to help patients with difficulty in performing squats, termed the sliding tilt table, at different knee angles and to estimate the squat level for each angle. METHODS This study was a cross-sectional, observational study performed in the general community. Participants comprised 30 healthy adult men. Squats were performed by setting the knee joints at 30, 60, and 90° and the tilt table angles to 15, 30, and 45°. The muscle activity of the vastus medialis, tibialis anterior, and gastrocnemius was measured using surface electromyography. RESULTS As the tilt table and knee joint angle increased, the %maximal voluntary isometric contraction increased. Similar patterns were found in both legs. CONCLUSIONS Weight-bearing exercises, such as squats, are important exercise elements in patients who require lower limb rehabilitation. Therefore, it is necessary to provide efficient lower limb rehabilitation exercises by adjusting the squat level according to the patient's ability, which can be achieved using a sliding tilt table.
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Affiliation(s)
- Tae Sung Park
- Department of Convergence Medical Institute of Technology, Biomedical Research Institute, Pusan National University Hospital, Busan, Republic of Korea
| | - Myung-Jun Shin
- Department of Rehabilitation Medicine, Convergence Medical Institute of Technology, Biomedical Research Institute of Pusan National University Hospital, Busan, Republic of Korea
- Department of Rehabilitation Medicine, Pusan National University School of Medicine, Busan, Republic of Korea
| | - Jong Ho Kang
- Department of Physical Therapy, College of Health Sciences, Catholic University of Pusan, Busan, Republic of Korea
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Konishi R, Ozawa J, Kuniki M, Yamagiwa D, Kito N. Sex differences in pelvis, thigh, and shank coordination during walking. J Biomech 2024; 162:111891. [PMID: 38147810 DOI: 10.1016/j.jbiomech.2023.111891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 11/27/2023] [Accepted: 11/28/2023] [Indexed: 12/28/2023]
Abstract
Differences in lower limb kinematics between males and females during functional activities may be attributed to sex differences in the incidence of patellofemoral pain, which is more common in females. To better comprehend the knee joint motion, it is necessary to understand both inter-segmental coordination patterns and angular amplitude. This exploratory study aimed to assess sex differences in pelvis-thigh and thigh-shank coordination patterns in the frontal and horizontal planes during walking. Data regarding the kinematic characteristics of the pelvis, thigh, and shank segments were collected from 26 males and 26 females performing walking at self-selected speeds using a 3D motion capture system. Furthermore, we compared the kinematics of the pelvis, thigh, and shank during walking as well as the pelvis-thigh and thigh-shank coordination patterns in the frontal and horizontal planes during the stance phase between males and females. Compared to males, females had greater thigh adduction (p < 0.001) and internal rotation (p < 0.001) throughout the stance phase; significantly greater frequency of the pelvis-thigh anti-phase pattern in the frontal plane in the early (p = 0.002) and mid-stance (p = 0.003); and significantly greater thigh-shank anti-phase pattern in the frontal plane in the early (p = 0.001) and mid-stance (p = 0.015). These results suggest the presence of sex differences in the inter-segmental coordination of the pelvis and lower limb during walking. However, as this study could not determine a causal relationship between female sex and knee joint injury, further longitudinal studies are needed to determine the effects of differences in coordination patterns on the pathophysiology of the injury and pain generation.
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Affiliation(s)
- Rei Konishi
- Department of Rehabilitation, Faculty of Rehabilitation, Hiroshima International University, Hiroshima, Japan.
| | - Junya Ozawa
- Department of Rehabilitation, Faculty of Rehabilitation, Hiroshima International University, Hiroshima, Japan
| | - Masahiro Kuniki
- Major in Medical Engineering and Technology, Graduate School of Medical Technology and Health Welfare Science, Hiroshima International University, Hiroshima, Japan
| | - Daiki Yamagiwa
- Major in Medical Engineering and Technology, Graduate School of Medical Technology and Health Welfare Science, Hiroshima International University, Hiroshima, Japan
| | - Nobuhiro Kito
- Department of Rehabilitation, Faculty of Rehabilitation, Hiroshima International University, Hiroshima, Japan
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46
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Jafarnezhadgero A, Givi AM, Hamlabadi MP, Sajedi H, Zago M. Muscle activation while running on the ground compared to artificial turf in males with pronated and supinated feet. Gait Posture 2024; 107:306-311. [PMID: 37914560 DOI: 10.1016/j.gaitpost.2023.10.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 09/15/2023] [Accepted: 10/25/2023] [Indexed: 11/03/2023]
Abstract
BACKGROUND Running on different surfaces, including natural and artificial surfaces, requires different gait mechanics, especially in individuals with foot deformity. RESEARCH QUESTION How muscle activity change during running on the ground and artificial turf in males with pronated and supinated feet? METHODS In this quasi-experimental study, we assessed a cohort of young male subjects, classified as healthy (n = 10), and with pronated (n = 10) or supinated (n = 10) feet. An electromyographic system was used to record lower limb muscle activity while running on the ground and artificial turf at constant speed (3.2 m/s). RESULTS Results demonstrated significant main effects of the "surface" factor for vastus medialis activity during the loading phase (p = 0.040, η2 =0.147). Paired comparison revealed significantly greater vastus medialis activity while running on artificial grass with respect to the ground. A significant effect of the "group" factor was found for medial gastrocnemius during loading phase (p = 0.020, η2 =0.250). Paired-wise comparison revealed significantly lower medial gastrocnemius activity in the pronated and supinated feet groups than in the healthy group. SIGNIFICANCE The healthy group may possess better neuromuscular control, allowing them to effectively coordinate the activation of the medial gastrocnemius with other muscles involved in running. Based on these findings, running on artificial turf is useful when the runner would like to strengthen vastus medialis muscle. The runner should carefully choose the running surface according to his/her state and training session goal.
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Affiliation(s)
- AmirAli Jafarnezhadgero
- Department of Sport Biomechanics, Faculty of Education Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran.
| | - Arezoo Madahi Givi
- Department of Sport Biomechanics, Faculty of Education Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran
| | - Milad Piran Hamlabadi
- Department of Sport Biomechanics, Faculty of Education Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran
| | - Heidar Sajedi
- Faculty of Health Sciences, Department of Exercise and Sports Sciences for Disabled People, International Science and Technology University, Ankara, Turkey
| | - Matteo Zago
- Department of Biomedical Sciences for Health, Università degli Studi di Milano, Italy
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47
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Kim KM, Needle AR, Kim JS, An YW, Cruz-Díaz D, Taube W. What interventions can treat arthrogenic muscle inhibition in patients with chronic ankle instability? A systematic review with meta-analysis. Disabil Rehabil 2024; 46:241-256. [PMID: 36650898 DOI: 10.1080/09638288.2022.2161643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 12/18/2022] [Indexed: 01/19/2023]
Abstract
PURPOSE To identify, critically appraise, and synthesize the existing evidence regarding the effects of therapeutic interventions on arthrogenic muscle inhibition (AMI) in patients with chronic ankle instability (CAI). MATERIALS AND METHODS Two reviewers independently performed exhaustive database searches in Web of Science, PubMed, Medline, CINAHL, and SPORTDiscus. RESULTS Nine studies were finally included. Five types of disinhibitory interventions were identified: focal ankle joint cooling (FAJC), manual therapy, fibular reposition taping (FRT), whole-body vibration (WBV), and transcranial direct current stimulation (tDCS). There were moderate effects of FAJC on spinal excitability in ankle muscles (g = 0.55, 95% CI = 0.03-1.08, p = 0.040 for the soleus and g = 0.54, 95% CI = 0.01-1.07, p = 0.046 for the fibularis longus). In contrast, manual therapy, FRT, WBV were not effective. Finally, 4 weeks of tDCS combined with eccentric exercise showed large effects on corticospinal excitability in 2 weeks after the intervention (g = 0.99, 95% CI = 0.14-1.85 for the fibularis longus and g = 1.02, 95% CI = 0.16-1.87 for the tibialis anterior). CONCLUSIONS FAJC and tDCS may be effective in counteracting AMI. However, the current evidence of mainly short-term studies to support the use of disinhibitory interventions is too limited to draw definitive conclusions.
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Affiliation(s)
- Kyung-Min Kim
- Department of Sport Science, Sungkyunkwan University, Suwon-si, Korea
- Department of Kinesiology and Sport Sciences, University of Miami, Coral Gables, FL, USA
| | - Alan R Needle
- Department of Public Health & Exercise Science, Appalachian State University, Boone, NC, USA
- Department of Rehabilitation Sciences, Appalachian State University, Boone, NC, USA
| | - Joo-Sung Kim
- Department of Kinesiology and Sport Sciences, University of Miami, Coral Gables, FL, USA
| | - Yong Woo An
- Department of Health and Human Sciences, Loyola Marymount University, Los Angeles, CA, USA
| | - David Cruz-Díaz
- Department of Health Sciences, Faculty of Health Sciences, University of Jaén, Jaén, Spain
| | - Wolfgang Taube
- Department of Neurosciences and Movement Sciences, University of Fribourg, Fribourg, Switzerland
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Debnath A, Esht V, Chahal A, Kashoo FZ, Alshehri MM, Shaphe MA, Jaleel G, Khan M, Alghadir AH. Association between back-leg-chest muscle strength and kicking speed in soccer players: an observational study. J Sports Med Phys Fitness 2024; 64:16-20. [PMID: 37712926 DOI: 10.23736/s0022-4707.23.15183-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Abstract
BACKGROUND Several studies have been performed on soccer kicks and stressed the significance of strength/power and coordination between the agonist and antagonist muscles of the lower limb. Along with accuracy, speed is also an important factor in a successful kick. It is reported that trunk musculature, hip and knee extensors of the non-kicking extremity, and hip adductors of the kicking side have a role in increasing the foot velocity while kicking. Since muscles do not work in isolation while kicking and several muscle groups of the leg and trunk have been reported to have a role in high-speed kicks, therefore measuring the combined strength of the leg, trunk, and arm muscles will be an appropriate method to examine their association with the kicking speed. The aim of this study was to examine the association of the combined strength of the lower extremities, back, chest, and arm muscles with the kicking speed of soccer players. METHODS Forty male soccer players (mean age 15.7 years) participated in the study. The back-leg-chest (BLC) dynamometer (Baseline, New York, NY, USA) and the mobile camera measured isometric muscle strength and kicking speed, respectively. The BLC dynamometer measured the isometric strength of the knee, hip, back extensors, and arm muscles. The kicking speed was measured by asking participants to kick a football in three directions - right, middle, and left - from 11 meters. RESULTS Significant (P<0.001) negative correlations of isometric strength of the back, leg, chest, and arm muscles and kicking speeds were found in all three directions. In all three correlations, Pearson's correlation coefficient was -0.989. Simple linear regression results showed that 97.8% (adjusted R2) of the variance observed in kicking speed (KS; RT), KS (MD), and KS (LT), was explained by the movement in BLC muscle strength values. CONCLUSIONS Kicking speeds in the right, middle, and left directions were negatively associated with the isometric strengths of the back, leg, chest, and arms muscles, measured using the BLC dynamometer, in participating soccer players.
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Affiliation(s)
| | - Vandana Esht
- Department of Physical Therapy, College of Applied Medical Sciences, Jazan University, Jazan, Saudi Arabia
| | - Aksh Chahal
- Department of Physiotherapy, School of Medical and Allied Health Science, Galgotias University, Greater Noida, Uttar Pradesh, India
| | - Faizan Z Kashoo
- Department of Physical Therapy and Health Rehabilitation, College of Applied Medical Sciences, Majmaah University, Majmaah, Saudi Arabia
| | - Mohammed M Alshehri
- Department of Physical Therapy, College of Applied Medical Sciences, Jazan University, Jazan, Saudi Arabia
| | - Mohammad A Shaphe
- Department of Physical Therapy, College of Applied Medical Sciences, Jazan University, Jazan, Saudi Arabia
| | - Ghufran Jaleel
- Center for Physiotherapy and Rehabilitation Sciences, Jamia Millia Islamia, New Delhi, India
| | - Masood Khan
- Department of Rehabilitation Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia -
| | - Ahmad H Alghadir
- Department of Rehabilitation Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
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Mitchell A, Greig M. Peak instantaneous PlayerLoad metrics highlight movement strategy deficits in professional male soccer players. Res Sports Med 2024; 32:61-71. [PMID: 35593507 DOI: 10.1080/15438627.2022.2079985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 04/11/2022] [Indexed: 10/18/2022]
Abstract
To investigate the influence of task, limb dominance and previous injury on single leg hop task performance and loading response, 25 professional male soccer players completed anterior, medial and lateral hop tests with an accelerometer at mid-calf. Performance outcome was defined as hop distance with loading response defined as the magnitude of, and time to peak instantaneous planar PlayerLoad. The performance was sensitive to task and previous injury (P < 0.001) but not limb dominance, with no evidence of bilateral asymmetry (P = 0.668). Despite impaired performance, previously injured players did not exhibit lower peak instantaneous PlayerLoad after impact in any plane (P ≥ 0.110). There was however a significantly (P = 0.001) longer time to peak medio-lateral loading after impact in previously injured players' affected limb. This observation was exacerbated when the injury was to the non-dominant limb (P = 0.041). Lower-limb accelerometry enhances understanding of movement strategy beyond task outcome, with practical implications in player screening and objective rehabilitation.
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Affiliation(s)
- Andy Mitchell
- Medical Department, RB Leipzig Football Club, Leipzig, Germany
| | - Matt Greig
- Sports Injuries Research Group, Edge Hill University, Ormskirk, UK
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50
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Coifman I, Kram R, Riemer R. Joint kinematic and kinetic responses to added mass on the lower extremities during running. Appl Ergon 2024; 114:104050. [PMID: 37633815 DOI: 10.1016/j.apergo.2023.104050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 04/10/2023] [Accepted: 05/16/2023] [Indexed: 08/28/2023]
Abstract
AIM We analyzed the biomechanical response (joint angles, moments, and powers) to running with added leg mass. These data may help guide the design of wearable locomotor assistive devices (i.e., exoskeletons), which are becoming more prevalent. METHODS 15 participants (7 females, 8 males) completed treadmill running trials (3m•s-1) normally and with lead mass (300-1350 g) attached to the thigh, shank, or foot, bilaterally. We quantified the lower limb biomechanics combining motion capture and ground reaction force data using standard inverse dynamics analysis. RESULTS Only moderate kinematic changes occurred in response to the distal added limb mass. Maximum hip flexion and maximum knee flexion angles during swing phase increased by approximately 9% and 6% respectively for each 1 kg added to each foot. However, adding even small masses made dramatic changes to the joint moments and powers, mostly during the swing phase. For example, adding 1 kg to each foot increased maximum joint moments by as much as 40% (knee extension in late swing) and maximum joint power by as much as 50% (hip generation in late swing). CONCLUSION Leg joint kinematics were largely conserved in response to adding mass to the legs. Adding mass to the leg distally increased joint power mainly at the knee and hip joints during the swing phase, whereas adding mass proximally mainly affected the ankle joint mechanics during the stance phase. These changes have implications for shoe designs, people who run with added mass on their legs for sport/strength training and for the design of wearable devices.
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Affiliation(s)
- Itay Coifman
- Industrial Engineering and Management Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Rodger Kram
- Integrative Physiology Department, University of Colorado, Boulder, CO, USA
| | - Raziel Riemer
- Industrial Engineering and Management Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
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