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Prince C, Guex K, Lachaux-Couttet G, Samozino P, Edouard P. Current warm-up practices before maximal sprinting in track-and-field (athletics). J Sports Med Phys Fitness 2024; 64:319-327. [PMID: 37955929 DOI: 10.23736/s0022-4707.23.15243-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2023]
Abstract
BACKGROUND Warm-up is commonly performed by track-and-field athletes before performing maximal sprinting activities. Whilst some warm-up strategies may enhance athletes' physical and mental readiness, less is known about the current athletes' behaviors and warm-up practices in track and field. Therefore, this study aimed to identify the warm-up practices in a population of athletes performing in sprinting disciplines. METHODS A cross-sectional exploratory study was performed in which track-and-field athletes, performing in athletics at a competitive level in disciplines requiring maximal acceleration and sprinting were recruited. We collected, using an online survey, information about 1) "General and Anthropometric data;" 2) "Athletics training practices" questioning the level of practices and the training frequency; and 3) "Athletics warm-up practices before maximal sprinting" questioning warm-up structure, duration and specific content. RESULTS A total of 114 athletes replied to the survey. They reported a mean weekly training duration of 10.5 (±4.0) hours and a pre-maximal sprint warm-up duration of 40.5 (±13.5) minutes. During warm-up, they were engaged in five principal activities: predominantly moderate jogging (95% participation, 8±3.3 minutes), succeeded by dynamic and/or ballistic stretching (78% participation, 9±4.3 minutes), followed by athletic drills (96% participation, 15±5.4 minutes), culminating in accelerations (100% participation) along with high-speed running (77% participation). Warm-up duration and composition differed across athletes' levels of practice and disciplines. CONCLUSIONS Most of the participants' warm-up practices were typically structured in a three-phase manner, comprising jogging, stretching, and specific training (athletic drills and accelerations). Most athletes followed scientific-based warm-up recommendations there are some areas where the evidence is limited, and more research is needed to determine the optimal warm-up routine for athletes.
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Affiliation(s)
- Caroline Prince
- Université Savoie Mont Blanc, Laboratoire Interuniversitaire de Biologie de la Motricité, Chambéry, France -
- Physiotherapy Department and Motion Analysis Lab, Swiss Olympic Medical Center, La Tour Hospital, Meyrin, Switzerland -
- Société Française des Masseurs Kinésithérapeute du Sport, SFMKS-Lab, Pierrefitte-sur-Seine, France -
| | - Kenny Guex
- School of Health Sciences (HESAV), HES-SO University of Applied Sciences and Arts Western Switzerland, Lausanne, Switzerland
- Department of Sprints, Hurdles and Relays, Swiss Athletics, Haus des Sports, Ittigen, Switzerland
| | - Guillaume Lachaux-Couttet
- Physiotherapy Department and Motion Analysis Lab, Swiss Olympic Medical Center, La Tour Hospital, Meyrin, Switzerland
| | - Pierre Samozino
- Université Savoie Mont Blanc, Laboratoire Interuniversitaire de Biologie de la Motricité, Chambéry, France
| | - Pascal Edouard
- UJM-Saint-Etienne, Inter-university Laboratory of Human Movement Biology, Saint-Etienne, France
- Unit of Sports Medicine, Department of Clinical and Exercise Physiology, University Hospital of Saint-Etienne, Faculty of Medicine, Saint-Etienne, France
- European Athletics Medical and Anti-Doping Commission, European Athletics Association (EAA), Lausanne, Switzerland
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Rafiq MT, Abdul Hamid MS, Hafiz E. Effectiveness of lower limb rehabilitation protocol using mobile health on quality of life, functional strength, and functional capacity among knee osteoarthritis patients who are overweight and obese: A randomized-controlled trial. Arch Rheumatol 2023; 38:590-601. [PMID: 38125060 PMCID: PMC10728733 DOI: 10.46497/archrheumatol.2023.9018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Accepted: 12/23/2021] [Indexed: 12/23/2023] Open
Abstract
Objectives This study aims to investigate the effectiveness of the lower limb rehabilitation protocol (LLRP) using mobile health (mHealth) on quality of life (QoL), functional strength, and functional capacity among knee OA patients who were overweight and obese. Patients and methods Between August 2019 and November 2020, a total of 96 patients (42 males, 54 females; mean age; 52.9±4.8 years; range, 40 to 60 years) were randomized into either the rehabilitation group with mobile health (RGw-mHealth) receiving reminders by using mHealth to carry on the strengthening exercises of LLRP and instructions of daily care (IDC), the rehabilitation group without mobile health (RGwo-mHealth) following the strengthening exercises of LLRP and instructions of daily care (IDC) and control group (CG) only following the IDC for duration of 12 weeks. The reminders for using mHealth were provided two times a day for three days a week. Primary outcome measures were QoL assessed by the Western Ontario and McMaster Universities Osteoarthritis Index summary score, and functional strength by five-repetition sit-to-stand test. Secondary outcome measure was functional capacity assessed by the Gait Speed Test. The assessments of QoL, functional strength, and functional capacity were taken at baseline and post-test after 12 weeks of intervention. Results After 12 weeks of intervention, the patients in all three groups had a statistically significant improvement in QoL within groups (p<0.05). Patients in the RGw-mHealth and RGwo-mHealth had a statistically significant improvement in functional strength and walking gait speed within groups (p<0.05). The pairwise between-group comparisons (Bonferroni post-hoc test) of the mean changes in QoL, functional strength, and functional capacity at post-test assessments revealed that patients in the RGw-mHealth had a statistically significant greater mean change in QoL, functional strength and functional capacity relative to both the RGwo-mHealth and CG (p<0.001). Conclusion The improvement in QoL, functional strength, and functional capacity was greater among patients in the RGw-mHealth compared to the RGwo-mHealth or CG.
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Affiliation(s)
- Muhammad Tariq Rafiq
- University of Malaya, Center For Sport and Exercise Sciences, Kuala Lumpur, Malaysia
| | | | - Eliza Hafiz
- University of Malaya, Center For Sport and Exercise Sciences, Kuala Lumpur, Malaysia
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Matsuo S, Iwata M, Miyazaki M, Fukaya T, Yamanaka E, Nagata K, Tsuchida W, Asai Y, Suzuki S. Acute and Prolonged Effects of 300 sec of Static, Dynamic, and Combined Stretching on Flexibility and Muscle Force. J Sports Sci Med 2023; 22:626-636. [PMID: 38045743 PMCID: PMC10690505 DOI: 10.52082/jssm.2023.626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 09/25/2023] [Indexed: 12/05/2023]
Abstract
Static stretching (SS), dynamic stretching (DS), and combined stretching (CS; i.e., DS+SS) are commonly performed as warm-up exercises. However, the stretching method with the greatest effect on flexibility and performance remains unclear. This randomized crossover trial examined acute and prolonged effects of SS, DS, and CS on range of motion (ROM), peak passive torque (PPT), passive stiffness, and isometric and concentric muscle forces. Twenty healthy young men performed 300 sec of active SS, DS, or CS (150-sec SS followed by 150-sec DS and 150-sec DS followed by 150-sec SS) of the right knee flexors on four separate days, in random order. Subsequently, we measured ROM, PPT, and passive stiffness during passive knee extension. We also measured maximum voluntary isometric and concentric knee flexion forces and surface electromyographic activities during force measurements immediately before, immediately after, and 20 and 60 min after stretching. All stretching methods significantly increased ROM and PPT, while significantly decreasing isometric knee flexion force (all p < 0.05). These changes lasted 60 min after all stretching methods; the increases in ROM and PPT and the decreases in isometric muscle force were similar. All stretching methods also significantly decreased passive stiffness immediately after stretching (all p < 0.05). Decreases in passive stiffness tended to be longer after CS than after SS or DS. Concentric muscle force was decreased after SS and CS (all p < 0.05). On the other hand, concentric muscle force was unchanged after DS, while the decreases in surface electromyographic activities during concentric force measurements after all stretching methods were similar. Our results suggest that 300 sec of SS, DS, and CS have different acute and prolonged effects on flexibility and muscle force.
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Affiliation(s)
- Shingo Matsuo
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan
| | - Masahiro Iwata
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan
| | - Manabu Miyazaki
- Department of Physical Therapy, Faculty of Medical Science for Health, Teikyo Heisei University, Tokyo, Japan
| | - Taizan Fukaya
- Department of Physical Therapy, Faculty of Social Work Studies, Josai International University, Togane, Japan
| | - Eiji Yamanaka
- Department of Rehabilitation Medicine, Tokyo Bay Rehabilitation Hospital, Narashino, Japan
| | - Kentaro Nagata
- Department of International Affairs, Project Division, Japanese Physical Therapy Association, Tokyo, Japan
| | - Wakako Tsuchida
- Health and Medical Research Institute, Department of Life Science and Biotechnology, National Institute of Advanced Industrial Science and Technology (AIST), Kagawa, Japan
| | - Yuji Asai
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan
| | - Shigeyuki Suzuki
- Department of Health and Sports Sciences, School of Health Sciences, Asahi University, Mizuho, Japan
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Behm DG, Alizadeh S, Daneshjoo A, Konrad A. Potential Effects of Dynamic Stretching on Injury Incidence of Athletes: A Narrative Review of Risk Factors. Sports Med 2023; 53:1359-1373. [PMID: 37162736 PMCID: PMC10289929 DOI: 10.1007/s40279-023-01847-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/18/2023] [Indexed: 05/11/2023]
Abstract
The use of dynamic stretching as a replacement for static stretching in the warm-up is widespread based on the reports of static stretching-induced performance impairments. While acute and chronic static stretching has been reported to reduce musculotendinous injuries, especially with explosive and change of direction actions, the influence of dynamic stretching on injury incidence lacks a similar volume of literature for acute and chronic responses. It was the objective of this narrative review to examine the acute and training effects of dynamic stretching on injury incidence and possible moderating variables such as dynamic stretching effects on range of motion, strength, balance, proprioception, muscle morphology, and psycho-physiological responses. One study demonstrated no significant difference regarding injury incidence when comparing a dynamic stretching-only group versus a combined dynamic stretching plus static stretching group. The only other study examined functional dynamic stretching training with injured dancers and reported improved ankle joint stability. However, several studies have shown that dynamic activity with some dynamic stretching exercises within a warm-up consistently demonstrates positive effects on injury incidence. Regarding moderating variables, while there is evidence that an acute bout of dynamic stretching can enhance range of motion, the acute and training effects of dynamic stretching on strength, balance, proprioception, and musculotendinous stiffness/compliance are less clear. The acute effects of dynamic stretching on thixotropic effects and psycho-physiological responses could be beneficial for injury reduction. However, the overall conflicting studies and a lack of substantial literature compared with SS effects points to a need for more extensive studies in this area.
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Affiliation(s)
- David G. Behm
- School of Human Kinetics and Recreation, Memorial University of Newfoundland, St. John’s, NL A1C 5S7 Canada
| | - Shahab Alizadeh
- School of Human Kinetics and Recreation, Memorial University of Newfoundland, St. John’s, NL A1C 5S7 Canada
| | - Abdolhamid Daneshjoo
- School of Human Kinetics and Recreation, Memorial University of Newfoundland, St. John’s, NL A1C 5S7 Canada
- Department of Sport Injuries and Corrective Exercises, Faculty of Sport Sciences, Shahid Bahonar University of Kerman, Kerman, Iran
| | - Andreas Konrad
- School of Human Kinetics and Recreation, Memorial University of Newfoundland, St. John’s, NL A1C 5S7 Canada
- Institute of Human Movement Science, Sport and Health, Graz University, Graz, Austria
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Reiner M, Gabriel A, Sommer D, Bernsteiner D, Tilp M, Konrad A. Effects of a High-Volume 7-Week Pectoralis Muscle Stretching Training on Muscle Function and Muscle Stiffness. SPORTS MEDICINE - OPEN 2023; 9:40. [PMID: 37261567 DOI: 10.1186/s40798-023-00582-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Accepted: 05/14/2023] [Indexed: 06/02/2023]
Abstract
BACKGROUND There is evidence that high-volume static stretching training of the lower limbs can increase the range of motion (ROM) while decreasing muscles stiffness. However, to date, there is no evidence on the effects of upper limb stretching training or its effect mechanism. Therefore, this study aimed to investigate the effects of a comprehensive 7-week static stretching training program of the pectoralis major muscle (PMa) on glenohumeral joint ROM, muscle force, and muscle stiffness. METHODS Thirty-eight healthy, physically active participants (23 male, 15 female) were randomly assigned to either the PMa-static stretching intervention (PMa-SS) group or the control group. The PMa-SS group performed a 7-week intervention comprising three sessions a week for 15 min per session, including three static stretching exercises of the PMa for 5 min each. Before and after the intervention period, shoulder extension ROM, muscle stiffness of the PMa (pars clavicularis), and maximal voluntary isometric contraction (MVIC) peak torque (evaluated at both long (MVIClong) and short (MVICshort) muscle lengths) were investigated on a custom-made testing device at 45° shoulder abduction. RESULTS In the PMa-SS group, the shoulder extension ROM (+ 6%; p < 0.01; d = 0.92) and the MVIClong (+ 11%; p = 0.01; d = 0.76) increased. However, there were no significant changes in MVICshort or in PMa muscle stiffness in the PMa-SS group. In the control group, no changes occurred in any parameter. CONCLUSION In addition to the increase in ROM, we also observed an improved MVIC at longer but not shorter muscle lengths. This potentially indicates an increase in fascicle length, and hence a likely increase in sarcomeres in series.
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Affiliation(s)
- Marina Reiner
- Institute of Human Movement Science, Sport and Health, University of Graz, Mozartgasse 14, 8010, Graz, Austria
| | - Anna Gabriel
- Professorship of Conservative and Rehabilitative Orthopedics, Department of Sport and Health Science, Technical University of Munich, Munich, Germany
| | - Daniel Sommer
- Institute of Human Movement Science, Sport and Health, University of Graz, Mozartgasse 14, 8010, Graz, Austria
| | - Daniel Bernsteiner
- Institute of Human Movement Science, Sport and Health, University of Graz, Mozartgasse 14, 8010, Graz, Austria
| | - Markus Tilp
- Institute of Human Movement Science, Sport and Health, University of Graz, Mozartgasse 14, 8010, Graz, Austria
| | - Andreas Konrad
- Institute of Human Movement Science, Sport and Health, University of Graz, Mozartgasse 14, 8010, Graz, Austria.
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The Effect of Remote Myofascial Release on Chronic Nonspecific Low Back Pain With Hamstrings Tightness. J Sport Rehabil 2023:1-8. [PMID: 36928003 DOI: 10.1123/jsr.2022-0141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 12/03/2022] [Accepted: 01/17/2023] [Indexed: 03/18/2023]
Abstract
CONTEXT Anatomy trains theory states that performing techniques in any part of the superficial myofascial backline can remotely treat other parts of this pathway. Due to the connections of different parts of the superficial backline, it is possible to influence the hamstring by performing the technique in the lumbar area. As chronic nonspecific low back pain (LBP) may lead to or be caused by hamstring tightness, remote myofascial release (MFR) techniques using the superficial backline can help improve hamstring tightness. OBJECTIVE This study aimed to evaluate the effect of remote MFR on hamstring tightness for those with chronic nonspecific LBP. DESIGN Single-blind, parallel design. SETTING The present study was performed at the clinical setting of Tarbiat Modares University in Iran. METHODS This study included 40 participants (20 males and 20 females) who were 40.5 (5.3) years old with chronic nonspecific LBP and hamstring tightness. INTERVENTIONS Participants were randomly divided into the lumbar MFR (remote area) and hamstring MFR groups. Participants underwent 4 sessions of MFR for 2 weeks. MAIN OUTCOME MEASURES A passive knee-extension (PKE) test was used for muscle tightness evaluation 3 times. RESULTS Repeated-measure analysis of variance test showed that after the lumbar and hamstring MFR, the PKE was significantly reduced in both legs: lumbar MFR (right knee: from 61.04° [2.17°] to 51.01° [4.11°], P ≤ .003 and left knee: from 63.02° [3.12°] to 52.09° [2.48°], P ≤ .004) and hamstring MFR (right knee: from 62.01° [4.32°] to 50.50° [7.18°], P ≤ .001 and left knee: from 63.11° [2.56°] to 51.32° [5.31°], P ≤ .002). Least Significant Difference (LSD) post hoc test results showed that the 2 groups were not significantly different after the MFR (P ≥ .05). Also, the intraclass correlation coefficient index showed that the PKE test has excellent reliability (intraclass correlation coefficient, .910 for the right limb and .915 for the left limb). The minimal detectable change at the 95% confidence interval indicated that a change greater than or equal to 6° is required to exceed the threshold of the error PKE test, respectively. CONCLUSION The present study showed that the remote MFR technique to the lumbar region demonstrated the same significant results in decreasing hamstring tightness as was noted in hamstring MFR to both limbs in patients with chronic nonspecific LBP.
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Alghadir AH, Khan M, Quddus N, Chawla C. Effects of different stretch durations on the strength of the proximal and distal group of muscles - a randomized trial. Medicine (Baltimore) 2022; 101:e31279. [PMID: 36316911 PMCID: PMC10662817 DOI: 10.1097/md.0000000000031279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 09/20/2022] [Indexed: 11/07/2022] Open
Abstract
BACKGROUND Different researchers have studied the effects of different types of stretching on different muscle groups. Since distal muscles are fully activated and proximal muscles are sub-optimally activated; thus, we might see different responses to stretching in the proximal and distal groups of muscles depending on their muscle activation. Therefore, this study aimed to compare the acute effects of 2, 4, and 8 minutes of intermittent static stretching (SS) on the isometric maximum voluntary contraction force (MVCF) of proximal (Hamstring) and distal (Calf) groups of muscles. METHODS Two groups pretest-posttest experimental design was used. A total of thirty participants were randomly assigned into two groups, and twenty-eight completed the intervention. In both groups, participants participated in three experimental trials (SS2, SS4, and SS8) on 3 days. 2-minute intermittent stretching (SS2) was performed on day-I, 4-minute (SS4) on day II, and 8-minute (SS8) on day III. Isometric MVCF was measured at pre-intervention, 0-, 10-, and 20-minute post-intervention periods in both groups. RESULTS In the proximal group: SS2, SS4, and SS8 did not affect isometric MVCF at the 0-, 10-, and 20-minute post-intervention periods (P > .05). In distal group: SS2 did not affect isometric MVCF at 0- and 10-minute post-intervention periods (P > .05), however at 20-minute, MVCF increased by 11.06% (P < .05). SS4 and SS8 also did not alter isometric MVCF in the Calf at 0-, 10-, and 20-minute post-intervention periods (P > .05). No significant differences were observed between the proximal and distal groups (P > .05). CONCLUSION 2-, 4-, and 8-minute intermittent SS did not affect the isometric strength in both muscle groups. In addition, proximal and distal groups of muscles responded similarly to three different duration intermittent SS.
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Affiliation(s)
- Ahmad H. Alghadir
- Department of Rehabilitation Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Masood Khan
- Department of Rehabilitation Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Nishat Quddus
- Department of Physiotherapy, Jamia Hamdard, New Delhi, India
| | - Chandan Chawla
- Ability Physiotherapy and Sports Injury Clinic, New Delhi, India
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Khan M, Alghadir AH. Time-based effects of different duration stretching on calf muscle strength. ISOKINET EXERC SCI 2022. [DOI: 10.3233/ies-220012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND: There are conflicting reports on the acute effects of stretching on muscle strength. Some studies report reduction in muscle strength however others report no change following stretching. OBJECTIVE: To assess the acute effects of static stretching (SS) of different durations on the isometric maximum voluntary contraction force (MVCF) of the calf muscle. METHODS: Pretest-posttest experimental design was used. Ten male participants (mean age 25.4 ± 2.11 years) participated in three experimental trials: SS for 2-minutes (SS2), 4-minutes (SS4), and 8-minutes (SS8). MVCF was measured before, immediately after, at 10- and 20-minutes post-stretch intervals. Each SS trial involved varied repetitions of 30-seconds stretches and 20-seconds relaxation periods. The isometric maximum voluntary contraction force (MVCF) was the outcome measure. RESULTS: SS2, SS4, and SS8 did not change the MVCF at 0-, 10- and 20-minutes post stretching intervals (p> 0.05). CONCLUSIONS: 2-, 4-, and 8-minutes intermittent SS did not change the isometric muscle strength in the Calf muscle up to 20 minutes after stretching and thus can safely be performed before those sporting events that require significant muscle strength.
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Hatano G, Matsuo S, Asai Y, Suzuki S, Iwata M. Effects of High-Intensity Stretch with Moderate Pain and Maximal Intensity Stretch without Pain on Flexibility. J Sports Sci Med 2022; 21:171-181. [PMID: 35719229 PMCID: PMC9157514 DOI: 10.52082/jssm.2022.171] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 03/09/2022] [Indexed: 06/15/2023]
Abstract
In this study, we aimed to identify the time course effects of different intensities of static stretch (SST) (maximal intensity without pain vs. high-intensity with moderate pain) on flexibility. This study included 16 healthy students (8 men and 8 women) who performed 1) 5-minute SST at 100%, 2) 110%, and 3) 120% intensity, as well as 4) no stretching (control) in a random sequence on four separate days. Static passive torque (SPT), hamstring electromyography (EMG), and pain intensity were continuously recorded during SST. We assessed markers of stiffness, range of motion (ROM), and maximal dynamic passive torque (DPTmax) before SST and 0, 15, 30, 45, 60, 75, and 90 minutes after SST. Stiffness decreased and ROM and DPTmax increased significantly immediately after SST at the three different intensity levels (p < 0.05). The effects of SST at 120% intensity were stronger and lasted longer than the effects of SST at 110% and 100% intensity (stiffness: -17%, -9%, and -7%, respectively; ROM: 14%, 10%, and 6%, respectively; DPTmax: 15%, 15%, and 9%, respectively). SPT decreased after SST at all intensities (p < 0.05). SST at 120% intensity caused a significantly greater reduction in SPT than SST at 100% intensity (p < 0.05). Pain intensity and EMG activity increased immediately after the onset of SST at 120% intensity (p < 0.05), although these responses were attenuated over time. Stretching intensity significantly correlated with the degree of change in ROM and stiffness (p < 0.05). These results support our hypothesis that stretch-induced flexibility is amplified and prolonged with an increase in stretch intensity beyond the pain threshold. Additional studies with more participants and different demographics are necessary to examine the generalizability of these findings.
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Affiliation(s)
- Genki Hatano
- Institute of Sport Science, ASICS Corporation, Kobe, Japan
| | - Shingo Matsuo
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan
| | - Yuji Asai
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan
| | - Shigeyuki Suzuki
- Department of Physical and Occupational Therapy, Graduate School of Medicine, Nagoya University, Nagoya, Japan
- Department of Health and Sports Sciences, School of Health Sciences, Asahi University, Mizuho, Japan
| | - Masahiro Iwata
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan
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Rafiq MT, Hamid MSA, Hafiz E. Short-Term Effects of Strengthening Exercises of the Lower Limb Rehabilitation Protocol on Pain, Stiffness, Physical Function, and Body Mass Index among Knee Osteoarthritis Participants Who Were Overweight or Obese: A Clinical Trial. ScientificWorldJournal 2021; 2021:6672274. [PMID: 34975349 PMCID: PMC8716196 DOI: 10.1155/2021/6672274] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 11/02/2021] [Accepted: 11/09/2021] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Osteoarthritis (OA) of the knee is defined as a progressive disease of the synovial joints and is characterized by wear and tear of the cartilage and underlying bone. This study aimed to determine the short-term effects of the lower limb rehabilitation protocol (LLRP) on pain, stiffness, physical function, and body mass index (BMI) among knee OA participants who were overweight or obese. Methodology. A single-blinded randomized controlled trial of one-month duration was conducted at Rehmatul-Lil-Alameen Postgraduate Institute, Lahore, Pakistan. Fifty overweight or obese participants with knee OA were randomly divided into two groups by a computer-generated number. Participants in the rehabilitation protocol group (RPG) were provided with leaflets explaining the strengthening exercises of the LLRP and instruction of daily care (IDC), while the participants in the control group (CG) were provided with leaflets explaining the IDC only for a duration of four weeks. The primary outcome measures were the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) scores for pain, stiffness, and physical function. The secondary outcome measures were BMI, exercise adherence, and patients' satisfaction assessed by using the numeric rating scale ranging from 0 to 10. The paired-sample t-test was used to analyze the differences within groups from baseline to posttest evaluations. The analysis of variance 2 × 2 factor was used to analyze the differences in BMI, knee pain, stiffness, and physical function between the groups. RESULTS Participants in the RPG and CG reported a statistically significant reduction in knee pain and stiffness (p ≤ 0.05) within the group. The reduction in the scores of knee pain was higher in participants in the RPG than that in participants in the CG (p=0.001). Additionally, participants in the RPG reported greater satisfaction (p=0.001) and higher self-reported exercise adherence (p=0.010) and coordinator-reported exercise adherence (p=0.046) than the participants in the CG. CONCLUSION Short-term effects of the LLRP appear to reduce knee pain and stiffness only, but not physical function and BMI.
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Affiliation(s)
- Muhammad Tariq Rafiq
- Centre for Sport and Exercise Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia
- Rehmatul-Lil-Alameen Postgraduate Institute of Cardiology, Punjab Employees Social Security Institution, Lahore, Pakistan
| | - Mohamad Shariff A. Hamid
- Unit of Sports Medicine, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Eliza Hafiz
- Centre for Sport and Exercise Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia
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Rafiq MT, Abdul Hamid MS, Hafiz E. The effect of rehabilitation protocol using mobile health in overweight and obese patients with knee osteoarthritis: a clinical trial. Adv Rheumatol 2021; 61:63. [PMID: 34689837 DOI: 10.1186/s42358-021-00221-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 10/11/2021] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE The objective of this randomized controlled trial (RCT) was to investigate the effectiveness of the lower limb rehabilitation protocol (LLRP) combined with mobile health (mHealth) applications on knee pain, mobility, functional activity and activities of daily living (ADL) among knee osteoarthritis (OA) patients who were overweight and obese. METHODS This study was a single-blind, RCT conducted at Teaching Bay of Rehmatul-Lil-Alameen Post Graduate Institute of Cardiology between February and November 2020. 114 knee OA patients who were overweight and obese were randomly divided by a computer-generated number into the rehabilitation group with mHealth (RGw-mHealth) to receive LLRP + instructions of daily care (IDC) combined with mHealth intervention, rehabilitation group without mHealth (RGwo-mHealth) to receive LLRP + IDC intervention and control group (CG) to receive IDC intervention. All three groups were also provided leaflets explaining about their intervention. The primary outcome measure was knee pain measured by the Western Ontario and McMaster Universities Osteoarthritis Index score. The secondary outcome measures were mobility measured by the Timed up and go (TUG) test, functional activity measured by the patient-specific functional scale (PSFS), and ADL measured by the Katz Index of independence in ADL scores. RESULTS Among the 114 patients who were randomized (mean age, 53 years), 96 (84%) completed the trial. After 3-months of intervention, patients in all three groups had statistically significant knee pain reduction (RGw-mHealth: 2.54; RGwo-mHealth: 1.47; and CG: 0.37) within groups (P < 0.05). Furthermore, patients in the RGw-mHealth and RGwo-mHealth had statistically significant improvement in mobility, functional activity, and ADL within groups (P < 0.05), but no improvement was noted in the CG (p > 0.05). As indicated in the overall analysis of covariance, there were statistically significant differences in the mean knee pain, mobility, functional activity, and ADL changes between groups after 3-months (p < 0.001). The pairwise between-group comparisons (Bonferroni post hoc analysis) of the knee pain, mobility, functional activity, and ADL scores at 3-months revealed that patients in the RGw-mHealth had significantly higher mean change in the knee pain, TUG test, functional activity, and ADL scores compared to patients in the RGwo-mHealth or CG. CONCLUSION Reduction in knee pain, improvement in mobility, functional activity, and ADL were more among patients in the RGw-mHealth compared with the RGwo-mHealth or CG. Trial registration National Medical Research Registry: NMRR-20-1094-52911. Date of registration: 05-05-2020. URL: https://www.nmrr.gov.my .
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Affiliation(s)
- Muhammad Tariq Rafiq
- Centre for Sport and Exercise Sciences, University of Malaya, Kuala Lumpur, Malaysia
| | | | - Eliza Hafiz
- Sports Centre, Centre for Sport and Exercise Sciences, University of Malaya, Kuala Lumpur, Malaysia
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Rafiq MT, A Hamid MS, Hafiz E. Effect of Progressive Resistance Strength Training on Body Mass Index, Quality of Life and Functional Capacity in Knee Osteoarthritis: A Randomized Controlled Trial. J Multidiscip Healthc 2021; 14:2161-2168. [PMID: 34408430 PMCID: PMC8364840 DOI: 10.2147/jmdh.s317896] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 07/26/2021] [Indexed: 01/03/2023] Open
Abstract
Purpose This study aimed to investigate the effectiveness of progressive resistance strength training of the lower limb rehabilitation protocol (LLRP) on body mass index (BMI), quality of life, and functional capacity in patients with knee osteoarthritis (OA) who were overweight and obese. Patients and Methods Fifty-six patients were allocated into either the Rehabilitation Protocol Group (RPG) or the Control Group (CG) by a computer-generated random number. The patients in the RPG performed the strengthening exercises of the LLRP and followed the instruction of daily care (IDC). The patients in the CG only followed the IDC as a usual care. Gait Speed Test, quality of life, and BMI were taken at pre-test and post-test measurements. Paired samples t-test and two way mixed analysis of variance were used to analyze the change of BMI within and compare the difference of BMI between the groups, respectively. Wilcoxon signed ranked test and Mann-Whitney U-test were used to analyze the changes of quality of life and functional capacity within and compare the differences of quality of life and functional capacity between the groups, respectively. Results The patients in the RPG reported a significant reduction in BMI (p = 0.025), improvement in quality of life (p ≤ 0.001), and functional capacity (p ≤ 0.001) within group. The patients in the CG also reported a significant improvements in quality of life (p < 0.05). The improvement in quality of life score was greater in the patients with RPG than the CG (p = 0.053). Conclusion The progressive resistance strength training of LLRP is effective in terms of reducing BMI, improving quality of life and functional capacity. Trial Registration Name: Iranian Registry of Clinical Trials. Number: IRCT20191221045846N3. Enrollment of first participant: 27-07-2020.
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Affiliation(s)
- Muhammad Tariq Rafiq
- Rehmatul-Lil-Alameen Postgraduate Institute of Cardiology, Punjab Employees Social Security Institution, Lahore, Pakistan.,Centre for Sport and Exercise Sciences, University of Malaya, Kuala Lumpur, 50603, Malaysia
| | | | - Eliza Hafiz
- Centre for Sport and Exercise Sciences, University of Malaya, Kuala Lumpur, 50603, Malaysia
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13
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Osama M. Effects of autogenic and reciprocal inhibition muscle energy techniques on isometric muscle strength in neck pain: A randomized controlled trial. J Back Musculoskelet Rehabil 2021; 34:555-564. [PMID: 33523036 DOI: 10.3233/bmr-200002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND Neck is one of the most common sites of musculoskeletal symptoms, and muscle shortening and weakness is observed to be a common cause of neck pain and disability. OBJECTIVE To compare the immediate and short term effects of static stretching (SS), autogenic inhibition (AI) and reciprocal inhibition (RI) muscle energy techniques (MET) on isometric muscle strength in the management of mechanical neck pain. METHODS A randomized controlled trial was conducted on 78 participants with neck pain randomly allocated to SS, AI-MET and RI-MET groups. All the participants received Trans Cutaneous Electrical Nerve Stimulation (TENS), hot pack and unilateral postero-anterior glide, followed by 3-5 repetitions of either SS, AI-MET or RI-MET for five consecutive sessions. Numeric pain rating scale (NPRS) and Modified Sphygmomanometer Dynamometry (MSD) were used as outcome measurement tools. One way ANOVA and repeated measures ANOVA were used for inter-group and intra-group comparison. RESULT In terms of MSD scores, a significant difference (p< 0.05) was observed between the groups. Both AI-MET and RI-MET were found to be comparatively more effective than SS, however AI-MET was found to be the most effective. CONCLUSION AI-MET is more effective than SS and RI-MET in terms of improving isometric muscle strength in patients with mechanical neck pain.
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Ogborn DI, Bellemare A, Bruinooge B, Brown H, McRae S, Leiter J. Comparison of Common Methodologies for the Determination of Knee Flexor Muscle Strength. Int J Sports Phys Ther 2021; 16:350-359. [PMID: 33842031 PMCID: PMC8016447 DOI: 10.26603/001c.21311] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 11/03/2020] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Knee flexion strength may hold important clinical implications for the determination of injury risk and readiness to return to sport following injury and orthopedic surgery. A wide array of testing methodologies and positioning options are available that require validation prior to clinical integration. The purpose of this study was to 1) investigate the validity and test-retest reliability of isometric knee flexion strength measured by a fixed handheld dynamometer (HHD) apparatus compared to a Biodex Dynamometer (BD), 2) determine the impact of body position (seated versus supine) and foot position (plantar- vs dorsiflexed) on knee flexion peak torque and 3) establish the validity and test-retest reliability of the NordBord Hamstring Dynamometer. STUDY DESIGN Validity and reliability study, test-retest design. METHODS Forty-four healthy participants (aged 27 ± 4.8 years) were assessed by two raters over two testing sessions separated by three to seven days. Maximal isometric knee flexion in the seated and supine position at 90o knee flexion was measured with both a BD and an externally fixed HHD with the foot held in maximal dorsiflexion or in plantar flexion. The validity and test-retest reliability of eccentric knee flexor strength on the NordBord hamstring dynamometer was assessed and compared with isometric strength on the BD. RESULTS Level of agreement between HHD and BD torque demonstrated low bias (bias -0.33 Nm, SD of bias 13.5 Nm; 95% LOA 26.13 Nm, -26.79 Nm). Interrater reliability of the HHD was high, varying slightly with body position (ICC range 0.9-0.97, n=44). Isometric knee flexion torque was higher in the seated versus supine position and with the foot dorsiflexed versus plantarflexed. Eccentric knee flexion torque had a high degree of correlation with isometric knee flexion torque as measured via the BD (r=0.61-0.86). The NordBord had high test-retest reliability (0.993 (95%CI 0.983-0.997, n=19) for eccentric knee flexor strength, with an MDC95 of 26.88 N and 28.76 N for the left and right limbs respectively. CONCLUSION Common measures of maximal isometric knee flexion display high levels of correlation and test-retest reliability. However, values obtained by an externally fixed HHD are not interchangeable with values obtained via the BD. Foot and body position should be considered and controlled during testing. LEVEL OF EVIDENCE 2b.
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Affiliation(s)
- Dan I Ogborn
- Department of Physical Therapy, University of Manitoba; Pan Am Clinic Foundation
| | - Alix Bellemare
- Pan Am Clinic Foundation; Faculty of Kinesiology and Recreation Management, University of Manitoba
| | - Brittany Bruinooge
- Department of Physical Therapy, University of Manitoba; Pan Am Clinic Foundation
| | | | - Sheila McRae
- Department of Physical Therapy, University of Manitoba; Pan Am Clinic Foundation
| | - Jeff Leiter
- Pan Am Clinic Foundation; Faculty of Kinesiology and Recreation Management, University of Manitoba
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Behm DG, Alizadeh S, Anvar SH, Drury B, Granacher U, Moran J. Non-local Acute Passive Stretching Effects on Range of Motion in Healthy Adults: A Systematic Review with Meta-analysis. Sports Med 2021; 51:945-959. [PMID: 33459990 DOI: 10.1007/s40279-020-01422-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/20/2020] [Indexed: 12/21/2022]
Abstract
BACKGROUND Stretching a muscle not only increases the extensibility or range of motion (ROM) of the stretched muscle or joint but there is growing evidence of increased ROM of contralateral and other non-local muscles and joints. OBJECTIVE The objective of this meta-analysis was to quantify crossover or non-local changes in passive ROM following an acute bout of unilateral stretching and to examine potential dose-response relations. METHODS Eleven studies involving 14 independent measures met the inclusion criteria. The meta-analysis included moderating variables such as sex, trained state, stretching intensity and duration. RESULTS The analysis revealed that unilateral passive static stretching induced moderate magnitude (standard mean difference within studies: SMD: 0.86) increases in passive ROM with non-local, non-stretched joints. Moderating variables such as sex, trained state, stretching intensity, and duration did not moderate the results. Although stretching duration did not present statistically significant differences, greater than 240-s of stretching (SMD: 1.24) exhibited large magnitude increases in non-local ROM compared to moderate magnitude improvements with shorter (< 120-s: SMD: 0.72) durations of stretching. CONCLUSION Passive static stretching of one muscle group can induce moderate magnitude, global increases in ROM. Stretching durations greater than 240 s may have larger effects compared with shorter stretching durations.
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Affiliation(s)
- David G Behm
- School of Human Kinetics and Recreation, Memorial University of Newfoundland, St. John's, NL, Canada.
| | - Shahab Alizadeh
- School of Human Kinetics and Recreation, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Saman Hadjizadeh Anvar
- School of Human Kinetics and Recreation, Memorial University of Newfoundland, St. John's, NL, Canada.,Faculty of Physical Education and Sport Sciences, University of Tehran, Tehran, Iran
| | - Ben Drury
- Department of Applied Sport Sciences, Hartpury University, Hartpury, UK
| | - Urs Granacher
- Division of Training and Movement Science, University of Potsdam, Potsdam, Germany
| | - Jason Moran
- School of Sport, Rehabilitation and Exercise Sciences, University of Essex, Essex, UK.
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Mechanisms underlying performance impairments following prolonged static stretching without a comprehensive warm-up. Eur J Appl Physiol 2020; 121:67-94. [PMID: 33175242 DOI: 10.1007/s00421-020-04538-8] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Accepted: 10/21/2020] [Indexed: 01/28/2023]
Abstract
Whereas a variety of pre-exercise activities have been incorporated as part of a "warm-up" prior to work, combat, and athletic activities for millennia, the inclusion of static stretching (SS) within a warm-up has lost favor in the last 25 years. Research emphasized the possibility of SS-induced impairments in subsequent performance following prolonged stretching without proper dynamic warm-up activities. Proposed mechanisms underlying stretch-induced deficits include both neural (i.e., decreased voluntary activation, persistent inward current effects on motoneuron excitability) and morphological (i.e., changes in the force-length relationship, decreased Ca2+ sensitivity, alterations in parallel elastic component) factors. Psychological influences such as a mental energy deficit and nocebo effects could also adversely affect performance. However, significant practical limitations exist within published studies, e.g., long-stretching durations, stretching exercises with little task specificity, lack of warm-up before/after stretching, testing performed immediately after stretch completion, and risk of investigator and participant bias. Recent research indicates that appropriate durations of static stretching performed within a full warm-up (i.e., aerobic activities before and task-specific dynamic stretching and intense physical activities after SS) have trivial effects on subsequent performance with some evidence of improved force output at longer muscle lengths. For conditions in which muscular force production is compromised by stretching, knowledge of the underlying mechanisms would aid development of mitigation strategies. However, these mechanisms are yet to be perfectly defined. More information is needed to better understand both the warm-up components and mechanisms that contribute to performance enhancements or impairments when SS is incorporated within a pre-activity warm-up.
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Han Q, Ma Y, Jia P, Wang X, Wang B, Zheng Y. A Randomized Controlled Pilot Study Comparing the Efficacy of Pulsed Radiofrequency Combined With Exercise Versus Exercise Alone in Pain Relief and Functional Improvement for Chronic Knee Osteoarthritis. Pain Pract 2020; 21:160-170. [PMID: 32700432 DOI: 10.1111/papr.12942] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 07/16/2020] [Accepted: 07/17/2020] [Indexed: 01/16/2023]
Abstract
OBJECTIVES To compare the long-term efficacy between pulsed radiofrequency (PRF) combined with passive stretching (PRF-PS) exercise and PS exercise alone in reducing pain and improving quadriceps muscle strength and knee function. METHODS Sixty-two participants were randomly assigned with a 1:1 allocation to the PRF-PS exercise group or the PS exercise group. Level of pain, muscle strength, and knee function were assessed from baseline to the first, third, and sixth months after treatment using the VAS, peak torque (PT), and the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), respectively. RESULTS There were no significant differences at baseline between the 2 groups. Compared to exercise alone, participants achieved superior efficacy with PRF-PS in pain relief, improvement of muscle strength, and knee function. Moreover, the improvement of all variables was maintained for a longer period of time in the PRF-PS group. The reduction in participants' VAS pain intensity scores was superior for PRF-PS vs. PS with overall estimation (adjusted mean difference: -1.85 cm; 95% confidence interval [CI] -2.25, -1.45 cm; P = 0.000). The increase in participants' PT scores was superior for PRF-PS vs. PS with overall estimation (adjusted mean difference: 15.53 N. m; 95% CI 7.07, 23.98 N. m; P = 0.000; and 12.62 N. m; 95% CI 0.96, 24.28 N. m; P = 0.000 for PT 60 degrees/s and PT 180 degrees/s, respectively). The reduction in participants' WOMAC scores was superior for PRF-PS vs. PS with overall estimation (adjusted mean difference: -16.43; 95% CI -22.22, -10.64; P = 0.000). DISCUSSION The improvement in pain relief and knee function might be associated with restoration of muscle strength after PRF-PS exercise by overcoming muscle inhibition.
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Affiliation(s)
- Qi Han
- Department of Pain Management, Huadong Hospital Affiliated to Fudan University, Shanghai, China
| | - Yantao Ma
- Department of Pain Management, Huadong Hospital Affiliated to Fudan University, Shanghai, China
| | - Peiyu Jia
- Department of Pain Management, Huadong Hospital Affiliated to Fudan University, Shanghai, China
| | - Xiaolei Wang
- Department of Pain Management, Huadong Hospital Affiliated to Fudan University, Shanghai, China
| | - Bo Wang
- Department of Pain Management, Huadong Hospital Affiliated to Fudan University, Shanghai, China
| | - Yongjun Zheng
- Department of Pain Management, Huadong Hospital Affiliated to Fudan University, Shanghai, China
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Chaabene H, Behm DG, Negra Y, Granacher U. Acute Effects of Static Stretching on Muscle Strength and Power: An Attempt to Clarify Previous Caveats. Front Physiol 2019; 10:1468. [PMID: 31849713 PMCID: PMC6895680 DOI: 10.3389/fphys.2019.01468] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Accepted: 11/14/2019] [Indexed: 12/30/2022] Open
Abstract
The effects of static stretching (StS) on subsequent strength and power activities has been one of the most debated topics in sport science literature over the past decades. The aim of this review is (1) to summarize previous and current findings on the acute effects of StS on muscle strength and power performances; (2) to update readers’ knowledge related to previous caveats; and (3) to discuss the underlying physiological mechanisms of short-duration StS when performed as single-mode treatment or when integrated into a full warm-up routine. Over the last two decades, StS has been considered harmful to subsequent strength and power performances. Accordingly, it has been recommended not to apply StS before strength- and power-related activities. More recent evidence suggests that when performed as a single-mode treatment or when integrated within a full warm-up routine including aerobic activity, dynamic-stretching, and sport-specific activities, short-duration StS (≤60 s per muscle group) trivially impairs subsequent strength and power activities (∆1–2%). Yet, longer StS durations (>60 s per muscle group) appear to induce substantial and practically relevant declines in strength and power performances (∆4.0–7.5%). Moreover, recent evidence suggests that when included in a full warm-up routine, short-duration StS may even contribute to lower the risk of sustaining musculotendinous injuries especially with high-intensity activities (e.g., sprint running and change of direction speed). It seems that during short-duration StS, neuromuscular activation and musculotendinous stiffness appear not to be affected compared with long-duration StS. Among other factors, this could be due to an elevated muscle temperature induced by a dynamic warm-up program. More specifically, elevated muscle temperature leads to increased muscle fiber conduction-velocity and improved binding of contractile proteins (actin, myosin). Therefore, our previous understanding of harmful StS effects on subsequent strength and power activities has to be updated. In fact, short-duration StS should be included as an important warm-up component before the uptake of recreational sports activities due to its potential positive effect on flexibility and musculotendinous injury prevention. However, in high-performance athletes, short-duration StS has to be applied with caution due to its negligible but still prevalent negative effects on subsequent strength and power performances, which could have an impact on performance during competition.
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Affiliation(s)
- Helmi Chaabene
- Division of Training and Movement Sciences, Research Focus Cognitive Sciences, University of Potsdam, Potsdam, Germany.,High Institute of Sports and Physical Education, Kef, University of Jendouba, Jendouba, Tunisia
| | - David G Behm
- School of Human Kinetics and Recreation, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Yassine Negra
- Research Unit (UR17JS01), Sport Performance, Health and Society, Higher Institute of Sport and Physical Education of Ksar Saîd, University of "La Manouba", Manouba, Tunisia
| | - Urs Granacher
- Division of Training and Movement Sciences, Research Focus Cognitive Sciences, University of Potsdam, Potsdam, Germany
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Kilit B, Arslan E, Soylu Y. Effects of different stretching methods on speed and agility performance in young tennis players. Sci Sports 2019. [DOI: 10.1016/j.scispo.2018.10.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Nonlinear approach to study the acute effects of static and dynamic stretching on local dynamic stability in lower extremity joint kinematics and muscular activity during pedalling. Hum Mov Sci 2019; 66:440-448. [PMID: 31176255 DOI: 10.1016/j.humov.2019.05.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 01/18/2019] [Accepted: 05/30/2019] [Indexed: 11/20/2022]
Abstract
Researchers have reported contradictory results on the effect of static and dynamic stretching on subsequent performance. Due to the importance of performance through static and dynamic stretching, the aim of this study is to investigate the acute effects of static and dynamic stretching protocols on local dynamic stability in lower extremity joint kinematics and muscular activities during pedalling using a nonlinear dynamics approach. Using a randomised crossover trial design, fifteen active males participated voluntarily in this research (mass: 69.02 ± 10.52 kg, height: 174.00 ± 6.74 cm, and age: 21.20 ± 1.47 years) and completed a pedalling trial in situations of without stretching (WS), after static (SS), and dynamic stretching (DS) of lower extremity. The lower extremity joint angles in the sagittal plane and the electrical activity of soleus, gastrocnemius medialis, tibialis anterior, vastus medialis, biceps femoris, and rectus femoris muscles were collected during 30 pedalling cycles at 70 rates per minute. The results of the repeated measure ANOVA indicated that the knee and ankle angle largest LyE was significantly lower in DS compared to WS and SS. The largest LyE in muscle activity is also significantly lower for all the muscles after DS compared to WS and SS (P ≤ 0.05). Regarding the positive effects of DS on the joints and the muscle activity local dynamic stability, it is suggested to use DS than SS in the warm-up program before repetitive activities like pedalling.
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Hamstring Stiffness Returns More Rapidly After Static Stretching Than Range of Motion, Stretch Tolerance, and Isometric Peak Torque. J Sport Rehabil 2018; 28:325-331. [PMID: 29252096 DOI: 10.1123/jsr.2017-0203] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Context: Hamstring injuries are common, and lack of hamstring flexibility may predispose to injury. Static stretching not only increases range of motion (ROM) but also results in reduced muscle strength after stretching. The effects of stretching on the hamstring muscles and the duration of these effects remain unclear. Objective: To determine the effects of static stretching on the hamstrings and the duration of these effects. Design: Randomized crossover study. Setting: University laboratory. Participants: A total of 24 healthy volunteers. Interventions: The torque-angle relationship (ROM, passive torque [PT] at the onset of pain, and passive stiffness) and isometric muscle force using an isokinetic dynamometer were measured. After a 60-minute rest, the ROM of the dynamometer was set at the maximum tolerable intensity; this position was maintained for 300 seconds, while static PT was measured continuously. The torque-angle relationship and isometric muscle force after rest periods of 10, 20, and 30 minutes were remeasured. Main Outcome Measures: Change in static PT during stretching and changes in ROM, PT at the onset of pain, passive stiffness, and isometric muscle force before stretching were compared with 10, 20, and 30 minutes after stretching. Results: Static PT decreased significantly during stretching. Passive stiffness decreased significantly 10 and 20 minutes after stretching, but there was no significant prestretching versus poststretching difference after 30 minutes. PT at the onset of pain and ROM increased significantly after stretching at all rest intervals, while isometric muscle force decreased significantly after all rest intervals. Conclusions: The effect of static stretching on passive stiffness of the hamstrings was not maintained as long as the changes in ROM, stretch tolerance, and isometric muscle force. Therefore, frequent stretching is necessary to improve the viscoelasticity of the muscle-tendon unit. Muscle force decreased for 30 minutes after stretching; this should be considered prior to activities requiring maximal muscle strength.
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Acute Effects of Dynamic Stretching on Muscle Flexibility and Performance: An Analysis of the Current Literature. Sports Med 2018; 48:299-325. [PMID: 29063454 DOI: 10.1007/s40279-017-0797-9] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Stretching has long been used in many physical activities to increase range of motion (ROM) around a joint. Stretching also has other acute effects on the neuromuscular system. For instance, significant reductions in maximal voluntary strength, muscle power or evoked contractile properties have been recorded immediately after a single bout of static stretching, raising interest in other stretching modalities. Thus, the effects of dynamic stretching on subsequent muscular performance have been questioned. This review aimed to investigate performance and physiological alterations following dynamic stretching. There is a substantial amount of evidence pointing out the positive effects on ROM and subsequent performance (force, power, sprint and jump). The larger ROM would be mainly attributable to reduced stiffness of the muscle-tendon unit, while the improved muscular performance to temperature and potentiation-related mechanisms caused by the voluntary contraction associated with dynamic stretching. Therefore, if the goal of a warm-up is to increase joint ROM and to enhance muscle force and/or power, dynamic stretching seems to be a suitable alternative to static stretching. Nevertheless, numerous studies reporting no alteration or even performance impairment have highlighted possible mitigating factors (such as stretch duration, amplitude or velocity). Accordingly, ballistic stretching, a form of dynamic stretching with greater velocities, would be less beneficial than controlled dynamic stretching. Notwithstanding, the literature shows that inconsistent description of stretch procedures has been an important deterrent to reaching a clear consensus. In this review, we highlight the need for future studies reporting homogeneous, clearly described stretching protocols, and propose a clarified stretching terminology and methodology.
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Barbosa GM, Figueirêdo Dantas GA, Silva BR, Souza TO, Brito Vieira WH. Static or dynamic stretching program does not change the acute responses of neuromuscular and functional performance in healthy subjects: a single-blind randomized controlled trial. REVISTA BRASILEIRA DE CIÊNCIAS DO ESPORTE 2018. [DOI: 10.1016/j.rbce.2018.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Ruan M, Li L, Chen C, Wu X. Stretch Could Reduce Hamstring Injury Risk During Sprinting by Right Shifting the Length-Torque Curve. J Strength Cond Res 2018; 32:2190-2198. [PMID: 29912857 PMCID: PMC6092089 DOI: 10.1519/jsc.0000000000002645] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Ruan, M, Li, L, Chen, C, and Wu, X. Stretch could reduce hamstring injury risk during sprinting by right shifting the length-torque curve. J Strength Cond Res 32(8): 2190-2198, 2018-It was hypothesized that static stretch would shift the length-torque curve to the right, which may reduce the risk of muscle strain injuries. The purpose of this study was to evaluate the acute effects of static stretching of hamstring (SSH) on the risk of hamstring injury during sprinting indicated by the shift of the length-torque relationship. Twelve female college athletes (age: 20.8 ± 0.7 years; height: 1.61 ± 0.05 m; body mass: 54.25 ± 4.22 kg) participated in this study. Subjects performed overground sprinting under 2 conditions: after warm-up with 4 × 30 seconds SSH or after warm-up without SSH. Three-dimensional kinematic and kinetic data and electromyography of biceps femoris long head (BFlh), rectus femoris, and vastus medialis were collected during testing. The maximum length of BFlh during late swing phase increased after SSH with large effect size and close to statistically significant (p = 0.05, d = 1.22), but the knee flexion torque at the peak length did not change significantly. Static stretching of hamstring significantly reduced peak values of both horizontal (d = 1.46) and vertical (d = 1.79) ground reaction forces, and BFlh's activation level during the preactivation (late swing) phase (p = 0.05, d = 2.16). The results indicated that the length of BFlh-knee torque relationship and the length of BFlh-hip torque relationships during the late swing phase and initial stance phase were shifted to the right after SSH, which may reduce risk of hamstring strain injuries. We suggest that preactivity static stretching should not be simply removed and participators should give priority to stretch muscles that are vulnerable to strain injuries.
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Affiliation(s)
- Mianfang Ruan
- Faculty of Physical Education, Ningbo University, Ningbo, China
- School of Kinesiology, Shanghai University of Sport, Shanghai, China; and
| | - Li Li
- Department of Health Sciences and Kinesiology, Georgia Southern University, Statesboro, Georgia
| | - Chen Chen
- School of Kinesiology, Shanghai University of Sport, Shanghai, China; and
| | - Xie Wu
- School of Kinesiology, Shanghai University of Sport, Shanghai, China; and
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25
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Sefiddashti L, Ghotbi N, Salavati M, Farhadi A, Mazaheri M. The effects of cryotherapy versus cryostretching on clinical and functional outcomes in athletes with acute hamstring strain. J Bodyw Mov Ther 2018; 22:805-809. [DOI: 10.1016/j.jbmt.2017.08.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 07/22/2017] [Accepted: 07/26/2017] [Indexed: 10/19/2022]
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Warren GL, Call JA, Farthing AK, Baadom-Piaro B. Minimal Evidence for a Secondary Loss of Strength After an Acute Muscle Injury: A Systematic Review and Meta-Analysis. Sports Med 2018; 47:41-59. [PMID: 27100114 PMCID: PMC5214801 DOI: 10.1007/s40279-016-0528-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
BACKGROUND An immediate loss of strength follows virtually all types of muscle injury but there is debate whether the initial strength loss is maximal or if a secondary loss of strength occurs during the first 3 days post-injury. OBJECTIVE The objective of this analysis was to conduct a systematic review and meta-analysis of the research literature to determine if a secondary loss of strength occurs after an injurious initiating event. METHODS Literature searches were performed using eight electronic databases (e.g., PubMed, Cochrane Library). Search terms included skeletal muscle AND (injur* OR damage*) AND (strength OR force OR torque). The extracted strength data were converted to a standard format by calculating the standardized mean difference, which is reported as the effect size (ES) along with its 95 % confidence interval (CI). The calculation of ES was designed so that a negative ES that was statistically less than zero would be interpreted as indicating a secondary loss of strength. RESULTS A total of 223 studies with over 4000 human and animal subjects yielded data on 262 independent groups and a total of 936 separate ESs. Our overall meta-analysis yielded a small-to-medium, positive overall ES that was statistically greater than zero (overall ES = +0.34, 95 % CI 0.27-0.40; P < 0.00000001). Considerable variation in ES was observed among studies (I 2 = 86 %), which could be partially explained by the research group conducting the study, sex of the subject, day of post-injury strength assessment, whether fatigue was present immediately post-injury, and the muscle group injured. From the subgroup meta-analyses probing these variables, 36 subgroup ESs were calculated and none were statistically less than zero. CONCLUSION Overall, our findings do not support the presence of a secondary loss of strength following an acute muscle injury, and strongly suggest that strength, on average, recovers steadily over the first 3 days post-injury.
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Affiliation(s)
- Gordon L Warren
- Department of Physical Therapy, Byrdine F. Lewis School of Nursing and Health Professions, Georgia State University, PO Box 4019, Atlanta, GA, 30302, USA.
| | - Jarrod A Call
- Department of Kinesiology, University of Georgia, Athens, GA, USA.,Regenerative Bioscience Center, University of Georgia, Athens, GA, USA
| | - Amy K Farthing
- Department of Physical Therapy, Byrdine F. Lewis School of Nursing and Health Professions, Georgia State University, PO Box 4019, Atlanta, GA, 30302, USA
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Krčmár M, Xaverová Z, Lehnert M, Krčmárová B, Šimonek J, Kanásová J, Bognar G, Vanderka M, Ruiz-Pérez I, Ayala F. Acute effects of different durations of static stretching on the eccentric strength and power of leg flexor muscles. ISOKINET EXERC SCI 2018. [DOI: 10.3233/ies-171187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Matúš Krčmár
- Hamar Institute for Human Performance, Faculty of Physical Education and Sport, Comenius University, Bratislava, Slovakia
| | - Zuzana Xaverová
- Faculty of Physical Culture, Palacky University in Olomouc, Czech Republic
| | - Michal Lehnert
- Faculty of Physical Culture, Palacky University in Olomouc, Czech Republic
| | - Bohumila Krčmárová
- Department of Physical Education and Sport, Faculty of Education, Constantine the Philosopher University, Nitra, Slovakia
| | - Jaromír Šimonek
- Department of Physical Education and Sport, Faculty of Education, Constantine the Philosopher University, Nitra, Slovakia
| | - Janka Kanásová
- Department of Physical Education and Sport, Faculty of Education, Constantine the Philosopher University, Nitra, Slovakia
| | - Gábor Bognar
- Humánkineziológia II. évf MSC Nappali, Testnevelési Egyetem, Budapest, Hungary
| | - Marián Vanderka
- Department of Track and Field, Faculty of Physical Education and Sport, Comenius University, Bratislava, Slovakia
| | | | - Francisco Ayala
- Sports Research Centre, Miguel Hernandez University of Elche, Spain
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28
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Aye T, Kuramoto-Ahuja T, Han H, Maruyama H. Comparison of immediate effects between two medical stretching techniques on Hamstrings flexibility. J Phys Ther Sci 2017; 29:1518-1521. [PMID: 28931979 PMCID: PMC5599812 DOI: 10.1589/jpts.29.1518] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 06/02/2017] [Indexed: 12/31/2022] Open
Abstract
[Purpose] The aim of this study was to compare immediate effects between new medical stretching (NMS) and conventional medical stretching (CMS) techniques on Hamstrings flexibility. [Subjects and Methods] Thirteen healthy adult males, with finger floor distance (FFD) less than zero centimeter, without known musculoskeletal and neurological impairment in spine or lower extremities, were included. The subjects were randomly allocated to two groups. The subjects were instructed to perform NMS and CMS (hold for 30 seconds once, twice for each side of lower extremity) for both sides (total two minutes, only one session for one day). The interval between the two techniques was one week. FFD was measured with digital standing trunk flexion meter at the pre-intervention and post-intervention of both techniques. [Results] The mean values of FFD improved at the post-interventions of both techniques. The tests of within subject effects indicated that the main effect of treatment was not significant but the main effect of time was significant and the interaction of treatment and time was also significant. [Conclusion] The results of this study indicated that both medical stretching techniques were effective on Hamstrings flexibility immediately after the intervention and NMS technique was more effective on improving flexibility.
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Affiliation(s)
- Thanda Aye
- Department of Physical Therapy, Graduate School of Health and Welfare Sciences, International University of Health and Welfare: 2600-1 Kitakanemaru, Ohtawara, Tochigi 324-8501, Japan.,Department of Physiotherapy, University of Medical Technology, Republic of the Union of Myanmar
| | - Tsugumi Kuramoto-Ahuja
- Department of Physical Therapy, Graduate School of Health and Welfare Sciences, International University of Health and Welfare: 2600-1 Kitakanemaru, Ohtawara, Tochigi 324-8501, Japan.,Department of Physical Therapy, School of Health Sciences, International University of Health and Welfare, Japan
| | - Heonsoo Han
- Department of Physical Therapy, Graduate School of Health and Welfare Sciences, International University of Health and Welfare: 2600-1 Kitakanemaru, Ohtawara, Tochigi 324-8501, Japan.,Department of Physical Therapy, School of Health Sciences, International University of Health and Welfare, Japan
| | - Hitoshi Maruyama
- Department of Physical Therapy, Graduate School of Health and Welfare Sciences, International University of Health and Welfare: 2600-1 Kitakanemaru, Ohtawara, Tochigi 324-8501, Japan.,Department of Physical Therapy, School of Health Sciences, International University of Health and Welfare, Japan
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Baxter C, Mc Naughton LR, Sparks A, Norton L, Bentley D. Impact of stretching on the performance and injury risk of long-distance runners. Res Sports Med 2016; 25:78-90. [PMID: 27912252 DOI: 10.1080/15438627.2016.1258640] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Stretching, either prior to exercise or at the end, or both, is typically carried out by all individuals undertaking sporting activity whether they be elite or recreational athletes. The many forms of stretching available to the athlete, either passive or active, have long been thought to improve performance, decrease injury and generally be advantageous to the athlete. This review examines the current state of the literature and evaluates what athletes can and should do with respect to this controversial topic.
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Affiliation(s)
- Claire Baxter
- a School of Health Science , Flinders University , Adelaide , South Australia , Australia
| | - Lars R Mc Naughton
- b Sport and Physical Activity , Edge Hill University , Ormskirk , United Kingdom
| | - Andy Sparks
- b Sport and Physical Activity , Edge Hill University , Ormskirk , United Kingdom
| | - Lynda Norton
- a School of Health Science , Flinders University , Adelaide , South Australia , Australia
| | - David Bentley
- a School of Health Science , Flinders University , Adelaide , South Australia , Australia
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Orishimo KF, McHugh MP. Effect of an eccentrically biased hamstring strengthening home program on knee flexor strength and the length-tension relationship. J Strength Cond Res 2016; 29:772-8. [PMID: 25226327 DOI: 10.1519/jsc.0000000000000666] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The purposes of this study were to document relative activation intensities of the hamstrings and gluteus maximus during 4 eccentric hamstring strengthening exercises and to assess the effects of a short-term strengthening program comprised of these exercises on knee flexor strength and the length-tension relationship. Twelve healthy subjects participated in this study. Electromyographic (EMG) activities from the biceps femoris, semitendinosus, and gluteus maximus were recorded as subjects performed (a) standing hip extension with elastic resistance, (b) trunk flexion in single limb stance (diver), (c) standing split (glider), and (d) supine sliding bridge (slider). Baseline isometric knee flexor strength was measured at 90, 70, 50, and 30° of flexion at the knee with the subject seated and the hip flexed to 50° from horizontal. After completing the 4-week training program, strength tests were repeated. Repeated-measures analysis of variance were used to compare EMG activity between muscles and to assess angle-specific strength improvements. Hamstring activity exceeded gluteus maximus activity for resisted hip extension, glider, and slider exercises (p < 0.001) but not for the diver (p = 0.087). Hamstring activation was greatest during the slider and resisted hip extension and lowest during the glider and the diver. Knee flexor strength improved by 9.0% (p = 0.005) but was not angle specific (training by angle p = 0.874). The short-term home training program effectively targeted the hamstrings and resulted in strength gains that were similar at short and long muscle lengths. These data demonstrate that hamstring strength can be improved using eccentrically biased unilateral exercises without the use of weights or other equipments.
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Affiliation(s)
- Karl F Orishimo
- Nicholas Institute of Sports Medicine and Athletic Trauma, Lenox Hill Hospital, New York, New York
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Behm DG, Blazevich AJ, Kay AD, McHugh M. Acute effects of muscle stretching on physical performance, range of motion, and injury incidence in healthy active individuals: a systematic review. Appl Physiol Nutr Metab 2015; 41:1-11. [PMID: 26642915 DOI: 10.1139/apnm-2015-0235] [Citation(s) in RCA: 314] [Impact Index Per Article: 34.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Recently, there has been a shift from static stretching (SS) or proprioceptive neuromuscular facilitation (PNF) stretching within a warm-up to a greater emphasis on dynamic stretching (DS). The objective of this review was to compare the effects of SS, DS, and PNF on performance, range of motion (ROM), and injury prevention. The data indicated that SS- (-3.7%), DS- (+1.3%), and PNF- (-4.4%) induced performance changes were small to moderate with testing performed immediately after stretching, possibly because of reduced muscle activation after SS and PNF. A dose-response relationship illustrated greater performance deficits with ≥60 s (-4.6%) than with <60 s (-1.1%) SS per muscle group. Conversely, SS demonstrated a moderate (2.2%) performance benefit at longer muscle lengths. Testing was performed on average 3-5 min after stretching, and most studies did not include poststretching dynamic activities; when these activities were included, no clear performance effect was observed. DS produced small-to-moderate performance improvements when completed within minutes of physical activity. SS and PNF stretching had no clear effect on all-cause or overuse injuries; no data are available for DS. All forms of training induced ROM improvements, typically lasting <30 min. Changes may result from acute reductions in muscle and tendon stiffness or from neural adaptations causing an improved stretch tolerance. Considering the small-to-moderate changes immediately after stretching and the study limitations, stretching within a warm-up that includes additional poststretching dynamic activity is recommended for reducing muscle injuries and increasing joint ROM with inconsequential effects on subsequent athletic performance.
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Affiliation(s)
- David G Behm
- a School of Human Kinetics and Recreation, Memorial University, St. John's, NL A1C 5S7, Canada
| | - Anthony J Blazevich
- b Centre for Exercise and Sports Science Research, Edith Cowan University, Joondalup Campus, 270 Joondalup Drive, Joondalup, WA 6027, Australia
| | - Anthony D Kay
- c Sport, Exercise and Life Sciences, School of Health, The University of Northampton, Northampton NN2 7AL, UK
| | - Malachy McHugh
- d Nicholas Institute of Sports Medicine and Athletic Trauma, Lenox Hill Hospital, New York, NY 10075, USA
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A taxa de desenvolvimento de força durante contrações isocinéticas dos extensores do joelho não é afetada pelo alongamento estático em indivíduos ativos. REVISTA BRASILEIRA DE CIÊNCIAS DO ESPORTE 2015. [DOI: 10.1016/j.rbce.2015.08.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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KAY ANTHONYD, HUSBANDS-BEASLEY JADE, BLAZEVICH ANTHONYJ. Effects of Contract–Relax, Static Stretching, and Isometric Contractions on Muscle–Tendon Mechanics. Med Sci Sports Exerc 2015; 47:2181-90. [DOI: 10.1249/mss.0000000000000632] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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Balle SS, Magnusson SP, McHugh MP. Effects of contract-relax vs static stretching on stretch-induced strength loss and length-tension relationship. Scand J Med Sci Sports 2015; 25:764-9. [DOI: 10.1111/sms.12399] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/05/2014] [Indexed: 11/29/2022]
Affiliation(s)
- S. S. Balle
- Nicholas Institute of Sports Medicine and Athletic Trauma; Lenox Hill Hospital; New York New York USA
- Institute of Sports Medicine Copenhagen & Musculoskeletal Rehabilitation Research Unit; Bispebjerg Hospital; Faculty of Health Sciences; University of Copenhagen; Copenhagen Denmark
| | - S. P. Magnusson
- Institute of Sports Medicine Copenhagen & Musculoskeletal Rehabilitation Research Unit; Bispebjerg Hospital; Faculty of Health Sciences; University of Copenhagen; Copenhagen Denmark
| | - M. P. McHugh
- Nicholas Institute of Sports Medicine and Athletic Trauma; Lenox Hill Hospital; New York New York USA
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Matsuo S, Suzuki S, Iwata M, Hatano G, Nosaka K. Changes in force and stiffness after static stretching of eccentrically-damaged hamstrings. Eur J Appl Physiol 2014; 115:981-91. [PMID: 25526850 DOI: 10.1007/s00421-014-3079-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Accepted: 12/08/2014] [Indexed: 11/30/2022]
Abstract
PURPOSE This study compared responses to static stretching between eccentrically damaged and non-damaged muscles. METHODS Twelve young men performed 60 maximum knee flexor eccentric contractions of one leg, and received a 300-s continuous passive static stretching at tolerable intensity without pain to both knee flexors at 2 and 4 days after the eccentric exercise. Range of motion (ROM) and passive stiffness during knee extension, passive torque at onset of pain (PT), maximum voluntary isometric (MVC-ISO) and isokinetic concentric contraction torque (MVC-CON), and visual analogue scale (VAS) for muscle soreness were measured before, immediately after, 60 min, 2 and 4 days after exercise as well as before, immediately after, 20 and 60 min after the stretching. Changes in these variables after eccentric exercise and stretching were compared between limbs. RESULTS The eccentric exercise decreased MVC-ISO, MVC-CON, ROM and PT, and increased passive stiffness and VAS (p < 0.05), suggesting that muscle damage was induced to the knee flexors. ROM and PT increased after stretching for both limbs; however, the magnitude of the increase was greater (p < 0.05) for the damaged than non-damaged limb. Passive stiffness decreased for both limbs similarly (4-7 %) at immediately after stretching (p < 0.05). Significant decreases in MVC-ISO torque (7-11 %) after stretching were observed only for the non-damaged limb (p < 0.05), but MVC-CON torque did not change after stretching for both limbs. VAS decreased for the exercised limb after stretching (p < 0.05). CONCLUSIONS These results suggest that the static stretching at tolerable intensity without pain produced greater positive effects on damaged than non-damaged muscles.
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Affiliation(s)
- Shingo Matsuo
- Program in Physical and Occupational Therapy, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami Higashiku, Nagoya, 461-8673, Japan
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36
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Matsuo S, Suzuki S, Iwata M, Banno Y, Asai Y, Tsuchida W, Inoue T. Acute effects of different stretching durations on passive torque, mobility, and isometric muscle force. J Strength Cond Res 2014; 27:3367-76. [PMID: 23524367 DOI: 10.1519/jsc.0b013e318290c26f] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Static stretching is widely applied in various disciplines. However, the acute effects of different durations of stretching are unclear. Therefore, this study was designed to investigate the acute effects of different stretching durations on muscle function and flexibility, and provide an insight into the optimal duration of static stretching. This randomized crossover trial included 24 healthy students (17 men and 7 women) who stretched their right hamstrings for durations of 20, 60, 180, and 300 seconds in a random order. The following outcomes were assessed using an isokinetic dynamometer as markers of lower-limb function and flexibility: static passive torque (SPT), dynamic passive torque (DPT), stiffness, straight leg raise (SLR), and isometric muscle force. Static passive torque was significantly decreased after all stretching durations (p < 0.05). Static passive torque was significantly lower after 60, 180, and 300 seconds of stretching compared with that after 20-second stretching, and stiffness decreased significantly after 180- and 300-second stretching (p < 0.05). In addition, DPT and stiffness were significantly lower after 300 seconds than after 20-second stretching (p < 0.05), and SLR increased significantly after all stretching durations (p < 0.05). Straight leg raise was higher after 180- and 300-second stretching than after 20-second stretching and higher after 300-second stretching than after 60-second stretching (p < 0.05). Isometric muscle force significantly decreased after all stretching durations (p < 0.05). Therefore, increased duration of stretching is associated with a decrease in SPT but an increase in SLR. Over 180 seconds of stretching was required to decrease DPT and stiffness, but isometric muscle force decreased regardless of the stretching duration. In conclusion, these results indicate that longer durations of stretching are needed to provide better flexibility.
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Affiliation(s)
- Shingo Matsuo
- 1Program in Physical and Occupational Therapy, Graduate School of Medicine, Nagoya University, Nagoya, Japan; 2Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan; and 3Department of Rehabilitation, Nagoya University Hospital, Nagoya, Japan
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Ryan ED, Herda TJ, Costa PB, Herda AA, Cramer JT. Acute effects of passive stretching of the plantarflexor muscles on neuromuscular function: the influence of age. AGE (DORDRECHT, NETHERLANDS) 2014; 36:9672. [PMID: 24981113 PMCID: PMC4150889 DOI: 10.1007/s11357-014-9672-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Accepted: 06/18/2014] [Indexed: 06/03/2023]
Abstract
The acute effects of stretching on peak force (Fpeak), percent voluntary activation (%VA), electromyographic (EMG) amplitude, maximum range of motion (MROM), peak passive torque, the passive resistance to stretch, and the percentage of ROM at EMG onset (%EMGonset) were examined in 18 young and 19 old men. Participants performed a MROM assessment and a maximal voluntary contraction of the plantarflexors before and immediately after 20 min of passive stretching. Fpeak (-11 %), %VA (-6 %), and MG EMG amplitude (-9 %) decreased after stretching in the young, but not the old (P > 0.05). Changes in Fpeak were related to reductions in all muscle activation variables (r = 0.56-0.75), but unrelated to changes in the passive resistance to stretch (P ≥ 0.24). Both groups experienced increases in MROM and peak passive torque and decreases in the passive resistance to stretch. However, the old men experienced greater changes in MROM (P < 0.001) and passive resistance (P = 0.02-0.06). Changes in MROM were correlated to increases in peak passive torque (r = 0.717), and the old men also experienced a nonsignificant greater (P = 0.08) increase in peak passive torque. %EMGonset did not change from pre- to post-stretching for both groups (P = 0.213), but occurred earlier in the old (P = 0.06). The stretching-induced impairments in strength and activation in the young but not the old men may suggest that the neural impairments following stretching are gamma-loop-mediated. In addition, the augmented changes in MROM and passive torque and the lack of change in %EMGonset for the old men may be a result of age-related changes in muscle-tendon behavior.
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Affiliation(s)
- Eric D Ryan
- Neuromuscular Research Laboratory, Department of Exercise and Sport Science, University of North Carolina-Chapel Hill, 209 Fetzer Hall, CB #8700, Chapel Hill, NC, 27599-8700, USA,
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Sacheck JM, Hall M. Current Evidence for the Impact of Physical Fitness on Health Outcomes in Youth. Am J Lifestyle Med 2014. [DOI: 10.1177/1559827614537780] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Physical fitness is tightly linked to our ability to be physically active, and poor fitness is tied to increased risk of lifestyle diseases such as diabetes and cardiovascular disease in adulthood. In 2011, the Institute of Medicine appointed an expert committee to review the evidence between physical fitness and health outcomes in youth. Specifically, experimental and longitudinal studies published between 2000 and 2010 were reviewed in the areas of body composition, cardiorespiratory fitness, musculoskeletal fitness, and flexibility. Specific fitness tests that were linked to health risk factors or health outcomes in each of these areas were identified. Recommendations for the best fitness test items for use in schools and also for a national survey were given. In addition, guidance was provided for interpretation of fitness test scores along with recommendations for areas of needed future research. Key findings from the final report “Fitness Measures and Health Outcomes in Youth” will be reviewed.
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Affiliation(s)
- Jennifer M. Sacheck
- Friedman School of Nutrition Science and Policy, Tufts University, Boston, Massachusetts (JMS, MH)
| | - Meghan Hall
- Friedman School of Nutrition Science and Policy, Tufts University, Boston, Massachusetts (JMS, MH)
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Cabido CET, Bergamini JC, Andrade AGP, Lima FV, Menzel HJ, Chagas MH. Acute Effect of Constant Torque and Angle Stretching on Range of Motion, Muscle Passive Properties, and Stretch Discomfort Perception. J Strength Cond Res 2014; 28:1050-7. [DOI: 10.1519/jsc.0000000000000241] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Lim KI, Nam HC, Jung KS. Effects on hamstring muscle extensibility, muscle activity, and balance of different stretching techniques. J Phys Ther Sci 2014; 26:209-13. [PMID: 24648633 PMCID: PMC3944290 DOI: 10.1589/jpts.26.209] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Accepted: 08/28/2013] [Indexed: 11/24/2022] Open
Abstract
[Purpose] The purpose of this study was to investigate the effects of two different
stretching techniques on range of motion (ROM), muscle activation, and balance. [Subjects]
For the present study, 48 adults with hamstring muscle tightness were recruited and
randomly divided into three groups: a static stretching group (n=16), a PNF stretching
group (n=16), a control group (n=16). [Methods] Both of the stretching techniques were
applied to the hamstring once. Active knee extension angle, muscle activation during
maximum voluntary isometric contraction (MVC), and static balance were measured before and
after the application of each stretching technique. [Results] Both the static stretching
and the PNF stretching groups showed significant increases in knee extension angle
compared to the control group. However, there were no significant differences in muscle
activation or balance between the groups. [Conclusion] Static stretching and PNF
stretching techniques improved ROM without decrease in muscle activation, but neither of
them exerted statistically significant effects on balance.
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Affiliation(s)
- Kyoung-Il Lim
- Department of Physical Therapy, Kyungbuk-College, Republic of Korea
| | - Hyung-Chun Nam
- Department of Physical Therapy, Kyungbuk-College, Republic of Korea
| | - Kyoung-Sim Jung
- Department of Physical Therapy, Kyungbuk-College, Republic of Korea
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AKAGI RYOTA, TAKAHASHI HIDEYUKI. Acute Effect of Static Stretching on Hardness of the Gastrocnemius Muscle. Med Sci Sports Exerc 2013; 45:1348-54. [DOI: 10.1249/mss.0b013e3182850e17] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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McHugh MP, Tallent J, Johnson CD. The Role of Neural Tension in Stretch-Induced Strength Loss. J Strength Cond Res 2013; 27:1327-32. [DOI: 10.1519/jsc.0b013e31828a1e73] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Chaabène H, Hachana Y, Franchini E, Mkaouer B, Chamari K. Physical and physiological profile of elite karate athletes. Sports Med 2013; 42:829-43. [PMID: 22901041 DOI: 10.1007/bf03262297] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
This review focuses on the most important physical and physiological characteristics of karate athletes from the available scientific research. It has been established that karate's top-level performers require a high fitness level. Top-level male karate athletes are typified by low body fat and mesomorphic-ectomorphic somatotype characteristics. Studies dealing with body composition and somatotype of females are scarce. Aerobic capacity has been reported to play a major role in karate performance. It prevents fatigue during training and ensures the recovery processes during rest periods between two subsequent bouts of fighting activity within a fight and between two consecutive matches. It has been established that there is no significant difference between male and female kata (forms) and kumite (sparring/combat) athletes with regard to aerobic performance. Nevertheless, further studies are needed to support these findings. Concerning anaerobic performance, there is a difference in maximal power explored by the force-velocity test between national and international level karatekas (karate practitioners) but, for the maximum accumulated oxygen deficit test there is no difference between them. Muscle explosive power plays a vital role in a karateka's capacity for high-level performance. However, it has been revealed that vertical jump performance, maximal power and maximal velocity differed between national- and international-level karatekas. Moreover, it has been reported that karate performance relies more on muscle power at lower loads rather than higher ones. Thus, karate's decisive actions are essentially dependent on muscle explosive power in both the upper and lower limbs. With regard to dynamic strength, limited research has been conducted. The maximal absolute bench press, half-squat one-repetition maximum and performance of isokinetic tasks differed significantly between highly competitive and novice male karatekas. Studies on female karate athletes do not exist. Concerning flexibility, which is important for the execution of high kicks and adequate range of action at high speeds, it has been demonstrated that karate athletes' ranges of bilateral hip and knee flexion are greater compared with non-karate athletes. Finally, reaction time is a crucial element in karate because high-level performance is based essentially on explosive techniques. A significant difference in the choice reaction time between high-level and novice karatekas exists. Further research is needed concerning the physiological characteristics of female karatekas, the differences between kata and kumite athletes and variations based on weight categories.
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Affiliation(s)
- Helmi Chaabène
- Research Unit, Analysis and Evaluation of Factors Affecting the Sport Performance, Higher Institute of Sports and Physical Education, Ksar Said, Tunisia.
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The Acute Effects of Upper Extremity Stretching on Throwing Velocity in Baseball Throwers. JOURNAL OF SPORTS MEDICINE (HINDAWI PUBLISHING CORPORATION) 2013; 2013:481490. [PMID: 26464880 PMCID: PMC4590899 DOI: 10.1155/2013/481490] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2013] [Revised: 08/31/2013] [Accepted: 09/19/2013] [Indexed: 11/19/2022]
Abstract
Purpose. To examine the effects of static and proprioceptive neuromuscular facilitation (PNF) stretching of the shoulder internal rotators on throwing velocity.
Subjects. 27 male throwers (mean age = 25.1 years old, SD = 2.4) with adequate knowledge of demonstrable throwing mechanics. Study Design. Randomized crossover trial with repeated measures. Methods. Subjects warmed up, threw 10 pitches at their maximum velocity, were randomly assigned to 1 of 3 stretching protocols (static, PNF, or no stretch), and then repeated their 10 pitches. Velocities were recorded after each pitch and average and peak velocities were recorded after each session. Results. Data were analyzed using a 3 × 2 repeated measures ANOVA. No significant interaction between stretching and throwing velocity was observed. Main effects for time were not statistically significant. Main effects for the stretching groups were statistically significant. Discussion. Results suggest that stretching of the shoulder internal rotators did not significantly affect throwing velocity immediately after stretching. This may be due to the complexity of the throwing task. Conclusions. Stretching may be included in a thrower's warm-up without any effects on throwing velocity. Further research should be performed using a population with more throwing experience and skill.
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Morais de Oliveira AL, Greco CC, Molina R, Denadai BS. The rate of force development obtained at early contraction phase is not influenced by active static stretching. J Strength Cond Res 2012; 26:2174-9. [PMID: 21997454 DOI: 10.1519/jsc.0b013e31823b0546] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The objective of this study was to investigate the influence of active static stretching on the maximal isometric muscle strength (maximal voluntary contraction [MVC]) and rate of force development (RFD) determined within time intervals of 30, 50, 100, and 200 milliseconds relative to the onset of muscle contraction. Fifteen men (aged 21.3 ± 2.4 years) were submitted on different days to the following tests: (a) familiarization session to the isokinetic dynamometer; (b) 2 maximal isometric contractions for knee extensors in the isokinetic dynamometer to determine MVC and RFD (control); and (c) 2 active static stretching exercises for the dominant leg extensors (10 × 30 seconds for each exercise with a 20-second rest interval between bouts). After stretching, the isokinetic test was repeated (poststretching). Conditions 2 and 3 were performed in random order. The RFD was considered as the mean slope of the moment-time curve at time intervals of 0-30, 0-50, 0-100; 0-150; and 0200 milliseconds relative to the onset of muscle contraction. The MVC was reduced after stretching (285 ± 59 vs. 271 ± 56 N · m, p < 0.01). The RFD at intervals of 0-30, 0-50, and 0-100 milliseconds was unchanged after stretching (p > 0.05). However, the RFD measured at intervals of 0-150 and 0-200 milliseconds was significantly lower after stretching (p < 0.01). It can be concluded that explosive muscular actions of a very short duration (<100 milliseconds) seem less affected by active static stretching when compared with actions using maximal muscle strength.
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Ayala F, De Ste Croix M, Sainz De Baranda P, Santonja F. Acute effects of static and dynamic stretching on hamstring eccentric isokinetic strength and unilateral hamstring to quadriceps strength ratios. J Sports Sci 2012; 31:831-9. [PMID: 23230900 DOI: 10.1080/02640414.2012.751119] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The main purposes of this study were to investigate the acute effects of static and dynamic lower limb stretching routines: (a) on peak torque, total external work and joint angle at peak torque of the hamstrings during maximal eccentric isokinetic leg flexion; (b) on unilateral hamstring to quadriceps (H/Q) strength ratios; as well as (c) to determine whether static and dynamic routines elicit similar responses. A total of 49 active adults completed the following intervention protocols in a randomised order on separate days: (a) non-stretching (control condition), (b) static stretching, and (c) dynamic stretching. After the stretching or control intervention, eccentric isokinetic peak torque, the angle of peak torque and total external work were assessed with participants prone at 1.04 and 3.14 rad · s(-1). Unilateral strength ratios of the knee were also recorded. Measures were compared via a fully-within-groups factorial analysis of variance (ANOVA). There were no main effects for eccentric isokinetic peak torque, angle of peak torque, total external work and unilateral H/Q strength ratios. The results suggest that dynamic and static stretching has no influence on eccentric strength profile and unilateral H/Q strength ratios and hence both forms of stretching do not reduce these two primary risk factors for muscle injury.
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Affiliation(s)
- Francisco Ayala
- Sports Research Centre, Miguel Hernandez University of Elche, Spain
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47
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Landry BW, Driscoll SW. Physical Activity in Children and Adolescents. PM R 2012; 4:826-32. [DOI: 10.1016/j.pmrj.2012.09.585] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2012] [Accepted: 09/19/2012] [Indexed: 12/01/2022]
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Herda TJ, Herda ND, Costa PB, Walter-Herda AA, Valdez AM, Cramer JT. The effects of dynamic stretching on the passive properties of the muscle-tendon unit. J Sports Sci 2012; 31:479-87. [PMID: 23113555 DOI: 10.1080/02640414.2012.736632] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The purpose of this study was to examine the effects of dynamic stretching on the passive biomechanical properties and isometric muscle strength of the knee flexors. Fourteen healthy men (mean ± s: age = 24 ± 3 years) performed passive range of motion assessments and isometric maximal voluntary contractions of the knee flexors at knee joint angles of 35°, 50°, 65°, 80°, and 95° below full knee extension before and after dynamic stretching. In addition, electromyographic amplitude was recorded from the biceps femoris during the maximal voluntary contractions. Passive stiffness and passive resistive torque were measured during pre- and post-dynamic stretching. The dynamic stretching included the participant extending their right leg outwards to the end range motion and pulling their leg back towards the body while seated in the isokinetic dynamometer for four 30-s bouts with 20-s rest between bouts. Passive range of motion increased while passive stiffness and passive resistive torque decreased following dynamic stretching. Peak torque decreased at knee joint angles of 65° and 80° below full extension, while electromyographic amplitude decreased following dynamic stretching. Dynamic stretching resulted in changes to passive stiffness and passive resistive torque that are typically reported following static stretching, however, there were decreases in peak torque at two of the knee joint angles.
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Affiliation(s)
- Trent J Herda
- University of Kansas, Department of Health, Sport and Exercise Sciences, 1301 Sunnyside Ave, Rm 101BE, Lawrence 66045, USA.
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Chaabène H, Hachana Y, Franchini E, Mkaouer B, Chamari K. Physical and Physiological Profile of Elite Karate Athletes. Sports Med 2012. [DOI: 10.2165/11633050-000000000-00000] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Kay AD, Blazevich AJ. Effect of acute static stretch on maximal muscle performance: a systematic review. Med Sci Sports Exerc 2012; 44:154-64. [PMID: 21659901 DOI: 10.1249/mss.0b013e318225cb27] [Citation(s) in RCA: 194] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
INTRODUCTION The benefits of preexercise muscle stretching have been recently questioned after reports of significant poststretch reductions in force and power production. However, methodological issues and equivocal findings have prevented a clear consensus being reached. As no detailed systematic review exists, the literature describing responses to acute static muscle stretch was comprehensively examined. METHODS MEDLINE, ScienceDirect, SPORTDiscus, and Zetoc were searched with recursive reference checking. Selection criteria included randomized or quasi-randomized controlled trials and intervention-based trials published in peer-reviewed scientific journals examining the effect of an acute static stretch intervention on maximal muscular performance. RESULTS Searches revealed 4559 possible articles; 106 met the inclusion criteria. Study design was often poor because 30% of studies failed to provide appropriate reliability statistics. Clear evidence exists indicating that short-duration acute static stretch (<30 s) has no detrimental effect (pooled estimate = -1.1%), with overwhelming evidence that stretch durations of 30-45 s also imparted no significant effect (pooled estimate = -1.9%). A sigmoidal dose-response effect was evident between stretch duration and both the likelihood and magnitude of significant decrements, with a significant reduction likely to occur with stretches ≥ 60 s. This strong evidence for a dose-response effect was independent of performance task, contraction mode, or muscle group. Studies have only examined changes in eccentric strength when the stretch durations were >60 s, with limited evidence for an effect on eccentric strength. CONCLUSIONS The detrimental effects of static stretch are mainly limited to longer durations (≥ 60 s), which may not be typically used during preexercise routines in clinical, healthy, or athletic populations. Shorter durations of stretch (<60 s) can be performed in a preexercise routine without compromising maximal muscle performance.
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Affiliation(s)
- Anthony D Kay
- Sport Exercise & Life Sciences, The University of Northampton, Northampton, United Kingdom.
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