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Selvakumar S, Li SM, Fahey P, Cheung RTH. Effect of surface inclination on vertical loading rate and footstrike pattern in trail and road runners. Sports Biomech 2023:1-10. [PMID: 37955262 DOI: 10.1080/14763141.2023.2278163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 10/27/2023] [Indexed: 11/14/2023]
Abstract
Trail runners have been reported to be more injury prone than road runners. Limited past studies have examined the difference in the running biomechanics between the two groups of runners. More importantly, the effect of surface inclination has not been fully investigated. Hence, this study examined the effect of surface inclination on running biomechanics in trail and road runners. Twenty trails and 20 road runners were recruited in this study. Trail runners appeared to be more experienced and had longer training distance per week (p < 0.001) compared to road runners. All participants ran at a self-selected pace on an instrumented treadmill in three inclination conditions (i.e., level, +10% uphill and -10% downhill) in a random order. Vertical average loading rate (VALR), vertical instantaneous loading rate (VILR) and footstrike angle (FSA) were measured using established methods. Trail runners experienced greater VILR (p = 0.039, Cohen's d = 2.9) with a greater FSA (p = 0.002, Cohen's d = 1.1) during downhill running than road runners. No significant differences in VALR, VILR and FSA were found between the two groups during level and uphill running. Our findings provide potential biomechanical rationale to explain a higher injury incidence among trail runners.
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Affiliation(s)
- Sharon Selvakumar
- School of Health Sciences, Western Sydney University, Campbelltown, New South Wales, Australia
| | - Sin Ming Li
- Physiotherapy Department, Tseung Kwan O Hospital, Hong Kong, China
| | - Paul Fahey
- School of Health Sciences, Western Sydney University, Campbelltown, New South Wales, Australia
- Translational Health Research Institute, Western Sydney University, Westmead, New South Wales, Australia
| | - Roy T H Cheung
- School of Health Sciences, Western Sydney University, Campbelltown, New South Wales, Australia
- Translational Health Research Institute, Western Sydney University, Westmead, New South Wales, Australia
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2
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Senatore SC, Takahashi KZ, Malcolm P. Using human-in-the-loop optimization for guiding manual prosthesis adjustments: a proof-of-concept study. Front Robot AI 2023; 10:1183170. [PMID: 37538962 PMCID: PMC10394618 DOI: 10.3389/frobt.2023.1183170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 06/28/2023] [Indexed: 08/05/2023] Open
Abstract
Introduction: Human-in-the-loop optimization algorithms have proven useful in optimizing complex interactive problems, such as the interaction between humans and robotic exoskeletons. Specifically, this methodology has been proven valid for reducing metabolic cost while wearing robotic exoskeletons. However, many prostheses and orthoses still consist of passive elements that require manual adjustments of settings. Methods: In the present study, we investigated if human-in-the-loop algorithms could guide faster manual adjustments in a procedure similar to fitting a prosthesis. Eight healthy participants wore a prosthesis simulator and walked on a treadmill at 0.8 ms-1 under 16 combinations of shoe heel height and pylon height. A human-in-the-loop optimization algorithm was used to find an optimal combination for reducing the loading rate on the limb contralateral to the prosthesis simulator. To evaluate the performance of the optimization algorithm, we used a convergence criterium. We evaluated the accuracy by comparing it against the optimum from a full sweep of all combinations. Results: In five out of the eight participants, the human-in-the-loop optimization reduced the time taken to find an optimal combination; however, in three participants, the human-in-the-loop optimization either converged by the last iteration or did not converge. Discussion: Findings from this study show that the human-in-the-loop methodology could be helpful in tasks that require manually adjusting an assistive device, such as optimizing an unpowered prosthesis. However, further research is needed to achieve robust performance and evaluate applicability in persons with amputation wearing an actual prosthesis.
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Affiliation(s)
- Siena C. Senatore
- Biomechanics Research Building, University of Nebraska at Omaha, Omaha, NE, United States
| | - Kota Z. Takahashi
- Department of Health and Kinesiology, University of Utah, Salt Lake City, UT, United States
| | - Philippe Malcolm
- Biomechanics Research Building, University of Nebraska at Omaha, Omaha, NE, United States
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3
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Kim J, McSweeney SC, Hollander K, Horstman T, Wearing SC. Adolescents running in conventional running shoes have lower vertical instantaneous loading rates but greater asymmetry than running barefoot or in partial-minimal shoes. J Sports Sci 2023; 41:774-787. [PMID: 37571975 DOI: 10.1080/02640414.2023.2240174] [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: 11/21/2022] [Accepted: 07/17/2023] [Indexed: 08/13/2023]
Abstract
Footwear may moderate the transiently heightened asymmetry in lower limb loading associated with peak growth in adolescence during running. This repeated-measures study compared the magnitude and symmetry of peak vertical ground reaction force and instantaneous loading rates (VILRs) in adolescents during barefoot and shod running. Ten adolescents (age, 10.6 ± 1.7 years) ran at self-selected speed (1.7 ± 0.3 m/s) on an instrumented treadmill under three counter-balanced conditions; barefoot and shod with partial-minimal and conventional running shoes. All participants were within one year of their estimated peak height velocity based on sex-specific regression equations. Foot-strike patterns, peak vertical ground reaction force and VILRs were recorded during 20 seconds of steady-state running. Symmetry of ground reaction forces was assessed using the symmetry index. Repeated-measures ANOVAs were used to compare conditions (α=.05). Adolescents used a rearfoot foot-strike pattern during barefoot and shod running. Use of conventional shoes resulted in a lower VILR (P < .05, dz = 0.9), but higher VILR asymmetry (P < .05) than running barefoot (dz = 1.5) or in partial-minimal shoes (dz = 1.6). Conventional running shoes result in a lower VILR than running unshod or in partial-minimal shoes but may have the unintended consequence of increasing VILR asymmetry. The findings may have implications for performance, musculoskeletal development and injury in adolescents.
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Affiliation(s)
- Jae Kim
- Complete Rehab Allied Health Clinic, Brisbane, Australia
| | - Simon C McSweeney
- School of Clinical Sciences, Queensland University of Technology, Brisbane, Australia
| | - Karsten Hollander
- Institute of Exercise Science & Sports Medicine, Medical School Hamburg, Hamburg, Germany
| | - Thomas Horstman
- Conservative and Rehabilitative Orthopaedics, Technical University Munich, Munich, Germany
| | - Scott C Wearing
- Conservative and Rehabilitative Orthopaedics, Technical University Munich, Munich, Germany
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4
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Plesek J, Hamill J, Blaschova D, Freedman-Silvernail J, Jandacka D. Acute effects of footwear on running impact loading in the preschool years. Sports Biomech 2023; 22:442-458. [PMID: 35378049 DOI: 10.1080/14763141.2022.2058599] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The aim of this study was to assess acute effects of footwear conditions (barefoot, minimalist and standard running shoes) on running impact loading in the preschool years. Fourty-eight habitually shod preschool children (26 males and 22 females) were divided into four age groups (3-, 4-, 5- and 6-year-old). Children performed a simple running game in three different conditions. Three-dimensional biomechanical analysis was carried out during overground running. Statistical parametric mapping was performed on the vertical ground reaction force profiles during the stance phase and one-way repeated measures ANOVA on the vertical instantaneous loading rate. Three-year-old children displayed significantly lower vertical ground reaction force values in the barefoot condition compared to minimalist (3-7% stance) and standard running shoes (7-11% stance). There were also differences in vertical instantaneous loading rate, where 3-year-olds had lower loading when barefoot than in minimalist (p = 0.010, d = 1.19) or running shoes (p = 0.045, d = 0.98), despite no differences in the footstrike pattern (mostly rearfoot-midfoot strike). No differences were found for the older children. Running in minimalist shoes did not imitate barefoot running in 3-year-old children. On the contrary, increased loading was observed in minimalist shoes in early running developmental stages.
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Affiliation(s)
- Jan Plesek
- Department of Human Movement Studies, Human Motion Diagnostic Centre, University of Ostrava, Ostrava, Czech Republic
| | - Joseph Hamill
- Department of Human Movement Studies, Human Motion Diagnostic Centre, University of Ostrava, Ostrava, Czech Republic.,Department of Kinesiology, Biomechanics and Motor Control Laboratories, University of Massachusetts, Amherst, MA, USA
| | - Denisa Blaschova
- Department of Human Movement Studies, Human Motion Diagnostic Centre, University of Ostrava, Ostrava, Czech Republic
| | - Julia Freedman-Silvernail
- Department of Human Movement Studies, Human Motion Diagnostic Centre, University of Ostrava, Ostrava, Czech Republic.,Department of Kinesiology and Nutrition Sciences, University of Nevada Las Vegas, Las Vegas, NV, USA
| | - Daniel Jandacka
- Department of Human Movement Studies, Human Motion Diagnostic Centre, University of Ostrava, Ostrava, Czech Republic
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Gruber AH, Warne JP, Hamill J. Isolated effects of footwear structure and cushioning on running mechanics in habitual mid/forefoot runners. Sports Biomech 2023; 22:422-441. [PMID: 36200613 DOI: 10.1080/14763141.2022.2129088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/10/2022]
Abstract
The true differences between barefoot and shod running are difficult to directly compare because of the concomitant change to a mid/forefoot footfall pattern that typically occurs during barefoot running. The purpose of this study was to compare isolated effects of footwear structure and cushioning on running mechanics in habitual mid/forefoot runners running shod (SHOD), barefoot (BF), and barefoot on a foam surface (BF+FOAM). Ten habitually shod mid/forefoot runners were recruited (male = 8, female = 2). Repeated measures ANOVA (α = 0.05) revealed differences between conditions for only vertical peak active force, contact time, negative and total ankle joint work, and peak dorsiflexion angle. Post hoc tests revealed that BF+FOAM resulted in smaller vertical active peak magnitude and instantaneous vertical loading rate than SHOD. SHOD resulted in lower total ankle joint work than BF and BF+FOAM. BF+FOAM resulted in lower negative ankle joint work than either BF or SHOD. Contact time was shorter with BF than BF+FOAM or SHOD. Peak dorsiflexion angle was smaller in SHOD than BF. No other differences in sagittal joint kinematics, kinetics, or ground reaction forces were observed. These overall similarities in running mechanics between SHOD and BF+FOAM question the effects of footwear structure on habituated mid/forefoot running described previously.
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Affiliation(s)
- A H Gruber
- The H.H. Morris Human Performance Laboratories, Department of Kinesiology, School of Public Health, Indiana University, Bloomington, IN, USA
| | - J P Warne
- Department of Applied Science, Technological University Dublin- Tallaght Campus, Dublin, Ireland.,Setanta College, Thurles Chamber of Commerce, Tipperary, Ireland
| | - J Hamill
- Biomechanics Laboratory, Department of Kinesiology, School of Public Health & Health Sciences, University of Massachusetts, Amherst, MA, USA
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Donahue SR, Hahn ME. Estimation of ground reaction force waveforms during fixed pace running outside the laboratory. Front Sports Act Living 2023; 5:974186. [PMID: 36860734 PMCID: PMC9968876 DOI: 10.3389/fspor.2023.974186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 01/16/2023] [Indexed: 02/15/2023] Open
Abstract
In laboratory experiments, biomechanical data collections with wearable technologies and machine learning have been promising. Despite the development of lightweight portable sensors and algorithms for the identification of gait events and estimation of kinetic waveforms, machine learning models have yet to be used to full potential. We propose the use of a Long Short Term Memory network to map inertial data to ground reaction force data gathered in a semi-uncontrolled environment. Fifteen healthy runners were recruited for this study, with varied running experience: novice to highly trained runners (<15 min 5 km race), and ages ranging from 18 to 64 years old. Force sensing insoles were used to measure normal foot-shoe forces, providing the standard for identification of gait events and measurement of kinetic waveforms. Three inertial measurement units (IMUs) were mounted to each participant, two bilaterally on the dorsal aspect of the foot and one clipped to the back of each participant's waistband, approximating their sacrum. Data input into the Long Short Term Memory network were from the three IMUs and output were estimated kinetic waveforms, compared against the standard of the force sensing insoles. The range of RMSE for each stance phase was from 0.189-0.288 BW, which is similar to multiple previous studies. Estimation of foot contact had an r 2 = 0.795. Estimation of kinetic variables varied, with peak force presenting the best output with an r 2 = 0.614. In conclusion, we have shown that at controlled paces over level ground a Long Short Term Memory network can estimate 4 s temporal windows of ground reaction force data across a range of running speeds.
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Affiliation(s)
- Seth R. Donahue
- Bowerman Sports Science Center, Department of Human Physiology, University of Oregon, Eugene, OR, United States
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Estimation of gait events and kinetic waveforms with wearable sensors and machine learning when running in an unconstrained environment. Sci Rep 2023; 13:2339. [PMID: 36759681 PMCID: PMC9911774 DOI: 10.1038/s41598-023-29314-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 02/02/2023] [Indexed: 02/11/2023] Open
Abstract
Wearable sensors and machine learning algorithms are becoming a viable alternative for biomechanical analysis outside of the laboratory. The purpose of this work was to estimate gait events from inertial measurement units (IMUs) and utilize machine learning for the estimation of ground reaction force (GRF) waveforms. Sixteen healthy runners were recruited for this study, with varied running experience. Force sensing insoles were used to measure normal foot-shoe forces, providing a proxy for vertical GRF and a standard for the identification of gait events. Three IMUs were mounted on each participant, two bilaterally on the dorsal aspect of each foot and one clipped to the back of each participant's waistband, approximating their sacrum. Participants also wore a GPS watch to record elevation and velocity. A Bidirectional Long Short Term Memory Network (BD-LSTM) was used to estimate GRF waveforms from inertial waveforms. Gait event estimation from both IMU data and machine learning algorithms led to accurate estimations of contact time. The GRF magnitudes were generally underestimated by the machine learning algorithm when presented with data from a novel participant, especially at faster running speeds. This work demonstrated that estimation of GRF waveforms is feasible across a range of running velocities and at different grades in an uncontrolled environment.
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Mundt M, Born Z, Goldacre M, Alderson J. Estimating Ground Reaction Forces from Two-Dimensional Pose Data: A Biomechanics-Based Comparison of AlphaPose, BlazePose, and OpenPose. SENSORS (BASEL, SWITZERLAND) 2022; 23:s23010078. [PMID: 36616676 PMCID: PMC9823796 DOI: 10.3390/s23010078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/12/2022] [Accepted: 12/16/2022] [Indexed: 05/14/2023]
Abstract
The adoption of computer vision pose estimation approaches, used to identify keypoint locations which are intended to reflect the necessary anatomical landmarks relied upon by biomechanists for musculoskeletal modelling, has gained increasing traction in recent years. This uptake has been further accelerated by keypoint use as inputs into machine learning models used to estimate biomechanical parameters such as ground reaction forces (GRFs) in the absence of instrumentation required for direct measurement. This study first aimed to investigate the keypoint detection rate of three open-source pose estimation models (AlphaPose, BlazePose, and OpenPose) across varying movements, camera views, and trial lengths. Second, this study aimed to assess the suitability and interchangeability of keypoints detected by each pose estimation model when used as inputs into machine learning models for the estimation of GRFs. The keypoint detection rate of BlazePose was distinctly lower than that of AlphaPose and OpenPose. All pose estimation models achieved a high keypoint detection rate at the centre of an image frame and a lower detection rate in the true sagittal plane camera field of view, compared with slightly anteriorly or posteriorly located quasi-sagittal plane camera views. The three-dimensional ground reaction force, instantaneous loading rate, and peak force for running could be estimated using the keypoints of all three pose estimation models. However, only AlphaPose and OpenPose keypoints could be used interchangeably with a machine learning model trained to estimate GRFs based on AlphaPose keypoints resulting in a high estimation accuracy when OpenPose keypoints were used as inputs and vice versa. The findings of this study highlight the need for further evaluation of computer vision-based pose estimation models for application in biomechanical human modelling, and the limitations of machine learning-based GRF estimation models that rely on 2D keypoints. This is of particular relevance given that machine learning models informing athlete monitoring guidelines are being developed for application related to athlete well-being.
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Affiliation(s)
- Marion Mundt
- UWA Minderoo Tech & Policy Lab, Law School, The University of Western Australia, Crawley, WA 6009, Australia
- Correspondence:
| | - Zachery Born
- UWA Minderoo Tech & Policy Lab, Law School, The University of Western Australia, Crawley, WA 6009, Australia
| | - Molly Goldacre
- UWA Minderoo Tech & Policy Lab, Law School, The University of Western Australia, Crawley, WA 6009, Australia
| | - Jacqueline Alderson
- UWA Minderoo Tech & Policy Lab, Law School, The University of Western Australia, Crawley, WA 6009, Australia
- Sports Performance Research Institute New Zealand (SPRINZ), Auckland University of Technology, Auckland 1010, New Zealand
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9
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Oliveira AS, Pirscoveanu CI, Rasmussen J. Predicting Vertical Ground Reaction Forces in Running from the Sound of Footsteps. SENSORS (BASEL, SWITZERLAND) 2022; 22:9640. [PMID: 36560009 PMCID: PMC9787899 DOI: 10.3390/s22249640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 11/29/2022] [Accepted: 12/05/2022] [Indexed: 06/17/2023]
Abstract
From the point of view of measurement, footstep sounds represent a simple, wearable and inexpensive sensing opportunity to assess running biomechanical parameters. Therefore, the aim of this study was to investigate whether the sounds of footsteps can be used to predict the vertical ground reaction force profiles during running. Thirty-seven recreational runners performed overground running, and their sounds of footsteps were recorded from four microphones, while the vertical ground reaction force was recorded using a force plate. We generated nine different combinations of microphone data, ranging from individual recordings up to all four microphones combined. We trained machine learning models using these microphone combinations and predicted the ground reaction force profiles by a leave-one-out approach on the subject level. There were no significant differences in the prediction accuracy between the different microphone combinations (p < 0.05). Moreover, the machine learning model was able to predict the ground reaction force profiles with a mean Pearson correlation coefficient of 0.99 (range 0.79−0.999), mean relative root-mean-square error of 9.96% (range 2−23%) and mean accuracy to define rearfoot or forefoot strike of 77%. Our results demonstrate the feasibility of using the sounds of footsteps in combination with machine learning algorithms based on Fourier transforms to predict the ground reaction force curves. The results are encouraging in terms of the opportunity to create wearable technology to assess the ground reaction force profiles for runners in the interests of injury prevention and performance optimization.
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Affiliation(s)
| | | | - John Rasmussen
- Department of Materials and Production, Aalborg University, DK-9220 Aalborg East, Denmark
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10
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Tinker M, Betten A, Morris S, Gibson N, Allison G, Ng L, Williams G, Chappell A. A comparison of the kinematics and kinetics of barefoot and shod running in children with cerebral palsy. Gait Posture 2022; 98:271-278. [PMID: 36215856 DOI: 10.1016/j.gaitpost.2022.09.084] [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: 02/21/2022] [Revised: 09/19/2022] [Accepted: 09/24/2022] [Indexed: 02/02/2023]
Abstract
BACKGROUND The biomechanics of barefoot and shod running are different for typically developing children but unknown for children with cerebral palsy (CP). Such differences may have implications for injury and performance. AIMS The primary aims of this study were to compare the lower limb biomechanics of barefoot and shod running in children with CP, and to determine whether any differences were the same in GMFCS levels I and II. METHODS This cross-sectional study examined 38 children with CP (n = 24 (GMFCS) level I; n = 14 GMFCS II), running overground at 3 speeds (jog, run, sprint) in barefoot and shod conditions. Marker trajectories and force plate data were recorded, and lower limb kinematics, kinetics and spatiotemporal variables were derived. Differences between barefoot and shod running were analysed using linear mixed models. RESULTS For both GMFCS levels, barefoot running resulted in higher loading rates, but smaller impact peaks at all speeds. Barefoot running was associated with greater hip and knee power; less ankle dorsiflexion and hip flexion at initial contact, and less ankle and knee range of motion during stance, compared to shod running, at all speeds. Barefoot stride length was shortened, and cadence increased compared to shod during jogging and running but not sprinting. For GMFCS level I only, barefoot running involved a higher incidence of forefoot strike, greater ankle power generation and less hip range of motion during stance. SIGNIFICANCE Running barefoot may facilitate running performance by increasing power generation at the ankle in children with CP, GMFCS level I. Higher barefoot loading rates may have implications for performance and injury.
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Affiliation(s)
- M Tinker
- School of Allied Health, Curtin University, Bentley WA 6102, Australia
| | - A Betten
- School of Allied Health, Curtin University, Bentley WA 6102, Australia
| | - S Morris
- School of Allied Health, Curtin University, Bentley WA 6102, Australia
| | - N Gibson
- School of Allied Health, Curtin University, Bentley WA 6102, Australia; Perth Children's Hospital, Nedlands WA 6009, Australia
| | - G Allison
- School of Allied Health, Curtin University, Bentley WA 6102, Australia
| | - L Ng
- School of Allied Health, Curtin University, Bentley WA 6102, Australia
| | - G Williams
- School of Physiotherapy, University of Melbourne, Victoria 3010, Australia
| | - A Chappell
- School of Allied Health, Curtin University, Bentley WA 6102, Australia; Western Kids Health, Mt Hawthorn WA 6016, Australia.
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Schmida EA, Wille CM, Stiffler-Joachim MR, Kliethermes SA, Heiderscheit BC. Vertical Loading Rate Is Not Associated with Running Injury, Regardless of Calculation Method. Med Sci Sports Exerc 2022; 54:1382-1388. [PMID: 35320147 PMCID: PMC9288487 DOI: 10.1249/mss.0000000000002917] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
INTRODUCTION Loading rate (LR), the slope of the vertical ground reaction force (vGRF), is commonly used to assess running-related injury risk. However, the relationship between LR and running-related injuries, including bone stress injuries (BSI), is unclear. Inconsistent findings may result from the numerous LR calculation methods that exist and their application across different running speeds. PURPOSE This study aimed to assess the influence of calculation method and running speed on LR values and to determine the association of LR during healthy running with subsequent injury. METHODS Healthy preseason running data and subsequent injury records from Division I cross-country athletes ( n = 79) over four seasons (2015-2019) at 2.68 m·s -1 , preferred training pace, and 4.47 m·s -1 were collected. LR at each speed was calculated four ways: 1) maximum and 2) average slope from 20% to 80% of vGRF magnitude at impact peak (IP), 3) average slope from initial contact to IP, and 4) average slope from 3% to 12% of stance time. Linear mixed effects models and generalized estimation equations were used to assess LR associations. RESULTS LR values differed depending on speed and calculation method ( P value <0.001). The maximum slope from 20% to 80% of the vGRF at 4.47 m·s -1 produced the highest LR estimate and the average slope from initial contact to IP at 2.68 m·s -1 produced the lowest. Sixty-four injuries (20 BSI) were observed. No significant association was found between LR and all injuries or BSI across any calculation method ( P values ≥0.13). CONCLUSIONS Calculation method and running speed result in significantly different LR values. Regardless of calculation method, no association between LR and subsequent injury was identified. Thus, healthy baseline LR may not be useful to prospectively assess running-related injury risk.
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Affiliation(s)
- Elizabeth A. Schmida
- Department of Orthopedics and Rehabilitation, University of Wisconsin-Madison, Madison, WI
- Badger Athletic Performance Program, University of Wisconsin-Madison, Madison, WI
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI
| | - Christa M. Wille
- Department of Orthopedics and Rehabilitation, University of Wisconsin-Madison, Madison, WI
- Badger Athletic Performance Program, University of Wisconsin-Madison, Madison, WI
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI
| | - Mikel R. Stiffler-Joachim
- Department of Orthopedics and Rehabilitation, University of Wisconsin-Madison, Madison, WI
- Badger Athletic Performance Program, University of Wisconsin-Madison, Madison, WI
| | - Stephanie A. Kliethermes
- Department of Orthopedics and Rehabilitation, University of Wisconsin-Madison, Madison, WI
- Badger Athletic Performance Program, University of Wisconsin-Madison, Madison, WI
| | - Bryan C. Heiderscheit
- Department of Orthopedics and Rehabilitation, University of Wisconsin-Madison, Madison, WI
- Badger Athletic Performance Program, University of Wisconsin-Madison, Madison, WI
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI
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12
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Wiegand K, Tandy R, Freedman Silvernail J. Plantar fasciitis injury status influences foot mechanics during running. Clin Biomech (Bristol, Avon) 2022; 97:105712. [PMID: 35779463 DOI: 10.1016/j.clinbiomech.2022.105712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 06/17/2022] [Accepted: 06/24/2022] [Indexed: 02/07/2023]
Abstract
BACKGROUND The biomechanical factors related to plantar fasciitis are not well understood. A history of injury is considered a risk factor for subsequent injury, but it is unknown if differences in mechanics exist before, during, and after injury. This study compared gait mechanics among individuals with plantar fasciitis, resolved plantar fasciitis, and uninjured controls. METHODS Thirty male and female runners were divided into three groups: 1) plantar fasciitis (n = 10, age 43 ± 11 years); 2) resolved plantar fasciitis (n = 10, age 43 ± 13 years); and 3) control (n = 10, age 38 ± 11 years). Participants ran at preferred velocity and 3.3 m/s while kinematics and kinetics were collected. Variables of interest include vertical loading rate, foot, ankle, knee, and hip kinematics, arch height index, arch rigidity index, and arch drop. Group differences were analyzed at each velocity using one-way analysis of variance. FINDINGS The plantar fasciitis group exhibited less forefoot extension (P = 0.02), more midfoot inversion (P < 0.01), and more midfoot extension (P < 0.01) than the resolved plantar fasciitis group. Foot mechanics in controls did not differ. Sagittal knee range of motion was greater in the plantar fasciitis group than resolved or control (P = 0.01). No other variables were significantly different among groups. INTERPRETATION The plantar fasciitis group exhibited dynamic foot mechanics which suggest a lower, more flexible arch compared to the resolved group, although static measures of foot structure and ankle motion did not differ. The differences between these groups indicate that the motion of the forefoot and midfoot during gait are important to consider for plantar fasciitis.
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Affiliation(s)
- Kristyne Wiegand
- Eastern Washington University, 526 5(th) St, Cheney, WA 99004, United States; University of Nevada, Las Vegas, 4505 S Maryland Pkwy, Las Vegas, NV 89154, United States.
| | - Richard Tandy
- University of Nevada, Las Vegas, 4505 S Maryland Pkwy, Las Vegas, NV 89154, United States
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Fu F, Guo L, Tang X, Wang J, Xie Z, Fekete G, Cai Y, Hu Q, Gu Y. Effect of the Innovative Running Shoes With the Special Midsole Structure on the Female Runners’ Lower Limb Biomechanics. Front Bioeng Biotechnol 2022; 10:866321. [PMID: 35733527 PMCID: PMC9208082 DOI: 10.3389/fbioe.2022.866321] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 04/27/2022] [Indexed: 11/21/2022] Open
Abstract
The study aimed to research the effects of innovative running shoes (a high heel-to-toe drop and special structure of midsole) on the biomechanics of the lower limbs and perceptual sensitivity in female runners. Fifteen healthy female runners were recruited to run through a 145-m runway with planted force plates at one peculiar speed (3.6 m/s ± 5%) with two kinds of shoe conditions (innovative running shoes vs. normal running shoes) while getting biomechanical data. The perception of shoe characteristics was assessed simultaneously through a 15-cm visual analog scale. The statistical parametric mapping technique calculated the time-series parameters. Regarding 0D parameters, the ankle dorsiflexion angle of innovative running shoes at touchdown was higher, and the peak dorsiflexion angle, range of motion, peak dorsiflexion velocity, and plantarflexion moment on the metatarsophalangeal joint of innovative running shoes during running were significantly smaller than those of normal running shoes (all p < 0.001). In addition, the braking phase and the time of peak vertical force 1 of innovative running shoes were found to be longer than those of normal running shoes (both p < 0.05). Meanwhile, the average vertical loading rate 1, peak vertical loading rate 1, peak braking force, and peak vertical force 1 in the innovative running shoes were lower than those of the normal running shoes during running (both p < 0.01). The statistical parametric mapping analysis exhibited a higher ankle dorsiflexion angle (0–4%, p < 0.05), a smaller knee internal rotation angle (0–6%, p < 0.05) (63–72%, p < 0.05), a decreased vertical ground reaction force (11–17%, p = 0.009), and braking anteroposterior ground reaction force (22–27%, p = 0.043) for innovative running shoes than normal running shoes. Runners were able to perceive the cushioning of innovative running shoes was better than that of normal running shoes. These findings suggested combining the high offset and structure of the midsole would benefit the industrial utilization of shoe producers in light of reducing the risk of running injuries for female runners.
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Affiliation(s)
- Fengqin Fu
- Faculty of Sports Science, Ningbo University, Ningbo, China
- Doctoral School on Safety and Security Sciences, Óbuda University, Budapest, Hungary
- Science Laboratory, Innovation center of Xtep Co., Ltd., Xiamen, China
| | - Lianming Guo
- Science Laboratory, Innovation center of Xtep Co., Ltd., Xiamen, China
| | - Xunfei Tang
- Science Laboratory, Innovation center of Xtep Co., Ltd., Xiamen, China
| | - Jiayu Wang
- Faculty of Sports Science, Ningbo University, Ningbo, China
| | - Zhihao Xie
- Science Laboratory, Innovation center of Xtep Co., Ltd., Xiamen, China
| | - Gusztáv Fekete
- Savaria Institute of Technology, Eötvös Loránd University, Budapest, Hungary
| | - Yuhui Cai
- Science Laboratory, Innovation center of Xtep Co., Ltd., Xiamen, China
| | - Qiuli Hu
- Faculty of Sports Science, Ningbo University, Ningbo, China
| | - Yaodong Gu
- Faculty of Sports Science, Ningbo University, Ningbo, China
- *Correspondence: Yaodong Gu,
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14
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Jafarnezhadgero AA, Hamlabadi MP, Sajedi H, Granacher U. Recreational runners who recovered from COVID-19 show different running kinetics and muscle activities compared with healthy controls. Gait Posture 2022; 91:260-265. [PMID: 34775229 PMCID: PMC8584715 DOI: 10.1016/j.gaitpost.2021.11.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 10/12/2021] [Accepted: 11/01/2021] [Indexed: 02/02/2023]
Abstract
BACKGROUND Social isolation through quarantine represents an effective means to prevent COVID-19 infection. A negative side-effect of quarantine is low physical activity. RESEARCH QUESTION What are the differences of running kinetics and muscle activities of recreational runners with a history of COVID-19 versus healthy controls? METHODS Forty men and women aged 20-30 years participated in this study and were divided into two experimental groups. Group 1 (age: 24.1 ± 2.9) consisted of participants with a history of COVID-19 (COVID group) and group 2 (age: 24.2 ± 2.7) of healthy age and sex-matched controls (controls). Both groups were tested for their running kinetics using a force plate and electromyographic activities (i.e., tibialis anterior [TA], gastrocnemius medialis [Gas-M], biceps femoris [BF], semitendinosus [ST], vastus lateralis [VL], vastus medialis [VM], rectus femoris [RF], gluteus medius [Glut-M]). RESULTS Results demonstrated higher peak vertical (p = 0.029; d=0.788) and medial (p = 0.004; d=1.119) ground reaction forces (GRFs) during push-off in COVID individuals compared with controls. Moreover, higher peak lateral GRFs were found during heel contact (p = 0.001; d=1.536) in the COVID group. COVID-19 individuals showed a shorter time-to-reach the peak vertical (p = 0.001; d=3.779) and posterior GRFs (p = 0.005; d=1.099) during heel contact. Moreover, the COVID group showed higher Gas-M (p = 0.007; d=1.109) and lower VM activity (p = 0.026; d=0.811) at heel contact. SIGNIFICANCE Different running kinetics and muscle activities were found in COVID-19 individuals versus healthy controls. Therefore, practitioners and therapists are advised to implement balance and/or strength training to improve lower limbs alignment and mediolateral control during dynamic movements in runners who recovered from COVID-19.
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Affiliation(s)
- Amir Ali Jafarnezhadgero
- Department of Sport Management and Biomechanics, Faculty of Education Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran
| | - Milad Piran Hamlabadi
- Department of Sport Management and Biomechanics, Faculty of Education Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran
| | - Heidar Sajedi
- Department of Sport Science, Farhangian University, Sanandaj, Iran
| | - Urs Granacher
- Division of Training and Movement Sciences, Research Focus Cognition Sciences, University of Potsdam, Potsdam, Germany,Corresponding author
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15
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Jafarnezhadgero AA, Fakhri E, Granacher U. Effects of nail softness and stiffness with distance running shoes on ground reaction forces and vertical loading rates in male elite long-distance runners with pronated feet. BMC Sports Sci Med Rehabil 2021; 13:120. [PMID: 34627372 PMCID: PMC8501533 DOI: 10.1186/s13102-021-00352-7] [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: 04/16/2021] [Accepted: 09/21/2021] [Indexed: 11/10/2022]
Abstract
BACKGROUND To improve propulsion during running, athletes often wear spike shoes designed for training and/or competition. Running with spike shoes may cause pain and/or injuries. To address this problem, a modified spike shoe was tested. This study aimed to evaluate the effects of running with dual-versus single-stiffness spike running shoes on running mechanics in long-distance runners with pronated feet. METHODS Sixteen male elite (national competitive level) runners (5000 or 10,000 m) aged 28.2 ± 2.5 years with pronated feet volunteered to participate in this study. To be included, participants had to have achieved personal best race times over 5- and/or 10-km races under 17 or 34 min during official running competitions. All participants were heel strikers and had a history of 11.2 ± 4.2 years of training. For the assessment of running kinetics, a force plate was imbedded into a walkway. Running kinematics were recorded using a Vicon-motion-capture system. Nike Zoom Rival shoes (Nike, Nike Zoom Rival, USA) were selected and adapted according to spike softness and stiffness. Participants ran at a constant speed of ~4.0 m/s across the walkway with both shoe conditions in randomized order. Six trials were recorded per condition. The main outcomes included peak ground reaction forces and their time-to-peak, average and instantaneous vertical loading rates, free moments, and peak ankle eversion angles. RESULTS Paired t-tests revealed significantly lower lateral (p = 0.021, d = 0.95) and vertical (p = 0.010, d = 1.40) forces at heel contact during running with dual-stiffness spike shoes. Running with dual-stiffness spike shoes resulted in a significantly longer time-to-peak vertical (p = 0.004, d = 1.40) force at heel contact. The analysis revealed significantly lower average (p = 0.005, d = 0.46) and instantaneous (p = 0.021, d = 0.49) loading rates and peak negative free moment amplitudes (p = 0.016, d = 0.81) when running with dual-stiffness spike shoes. Finally, significantly lower peak ankle eversion angles were observed with dual-stiffness spike shoes (p < 0.001, d = 1.29). CONCLUSIONS Running in dual- compared with single-stiffness spike distance running shoes resulted in lower loading rates, free moment amplitudes, and peak ankle eversion angles of long-distance runners with pronated feet.
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Affiliation(s)
- Amir Ali Jafarnezhadgero
- Department of Sport Managements and Biomechanics, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran
| | - Ehsan Fakhri
- Department of Sport Managements and Biomechanics, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran
| | - Urs Granacher
- Division of Training and Movement Sciences, Research Focus Cognition Sciences, University of Potsdam, Potsdam, Germany.
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16
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Isherwood J, Rimmer E, Fu F, Xie Z, Sterzing T. Biomechanical and perceptual cushioning sensitivity based on mechanical running shoe properties. FOOTWEAR SCIENCE 2021. [DOI: 10.1080/19424280.2021.1913243] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Joshua Isherwood
- Xtep Sports Science & Engineering Laboratory, Xtep (China) Co. Ltd, Xiamen, China
| | - Esther Rimmer
- Xtep Sports Science & Engineering Laboratory, Xtep (China) Co. Ltd, Xiamen, China
| | - Fengqin Fu
- Xtep Sports Science & Engineering Laboratory, Xtep (China) Co. Ltd, Xiamen, China
| | - Zhihao Xie
- Xtep Sports Science & Engineering Laboratory, Xtep (China) Co. Ltd, Xiamen, China
| | - Thorsten Sterzing
- Xtep Sports Science & Engineering Laboratory, Xtep (China) Co. Ltd, Xiamen, China
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17
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Yu L, Mei Q, Xiang L, Liu W, Mohamad NI, István B, Fernandez J, Gu Y. Principal Component Analysis of the Running Ground Reaction Forces With Different Speeds. Front Bioeng Biotechnol 2021; 9:629809. [PMID: 33842444 PMCID: PMC8026898 DOI: 10.3389/fbioe.2021.629809] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 02/26/2021] [Indexed: 01/10/2023] Open
Abstract
Ground reaction force (GRF) is a key metric in biomechanical research, including parameters of loading rate (LR), first impact peak, second impact peak, and transient between first and second impact peaks in heel strike runners. The GRFs vary over time during stance. This study was aimed to investigate the variances of GRFs in rearfoot striking runners across incremental speeds. Thirty female and male runners joined the running tests on the instrumented treadmill with speeds of 2.7, 3.0, 3.3, and 3.7 m/s. The discrete parameters of vertical average loading rate in the current study are consistent with the literature findings. The principal component analysis was modeled to investigate the main variances (95%) in the GRFs over stance. The females varied in the magnitude of braking and propulsive forces (PC1, 84.93%), whereas the male runners varied in the timing of propulsion (PC1, 53.38%). The female runners dominantly varied in the transient between the first and second peaks of vertical GRF (PC1, 36.52%) and LR (PC2, 33.76%), whereas the males variated in the LR and second peak of vertical GRF (PC1, 78.69%). Knowledge reported in the current study suggested the difference of the magnitude and patterns of GRF between male and female runners across different speeds. These findings may have implications for the prevention of sex-specific running-related injuries and could be integrated with wearable signals for the in-field prediction and estimation of impact loadings and GRFs.
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Affiliation(s)
- Lin Yu
- Loudi Vocational and Technical College, Loudi, China.,Faculty of Sports Sciences and Coaching, Sultan Idris Education University, Tanjong Malim, Malaysia.,Faculty of Sports Science, Ningbo University, Ningbo, China
| | - Qichang Mei
- Faculty of Sports Science, Ningbo University, Ningbo, China.,Research Academy of Grand Health, Ningbo University, Ningbo, China.,Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| | - Liangliang Xiang
- Faculty of Sports Science, Ningbo University, Ningbo, China.,Research Academy of Grand Health, Ningbo University, Ningbo, China.,Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| | - Wei Liu
- Faculty of Sports Science, Ningbo University, Ningbo, China
| | - Nur Ikhwan Mohamad
- Faculty of Sports Sciences and Coaching, Sultan Idris Education University, Tanjong Malim, Malaysia
| | - Bíró István
- Faculty of Engineering, University of Szeged, Szeged, Hungary
| | - Justin Fernandez
- Research Academy of Grand Health, Ningbo University, Ningbo, China.,Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand.,Department of Engineering Science, University of Auckland, Auckland, New Zealand
| | - Yaodong Gu
- Faculty of Sports Science, Ningbo University, Ningbo, China.,Research Academy of Grand Health, Ningbo University, Ningbo, China.,Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
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18
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Isherwood J, Wang H, Sterzing T. Running biomechanics and running shoe perception of Chinese men and women. FOOTWEAR SCIENCE 2020. [DOI: 10.1080/19424280.2020.1853827] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Joshua Isherwood
- Sports Science & Engineering Laboratory, Xtep (China) Co. Ltd, Xiamen, China
| | - Huan Wang
- Sports Science & Engineering Laboratory, Xtep (China) Co. Ltd, Xiamen, China
- Graduate School, Shenyang Sport University, Shenyang, China
| | - Thorsten Sterzing
- Sports Science & Engineering Laboratory, Xtep (China) Co. Ltd, Xiamen, China
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19
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Petrone N, Costa G, Foscan G, Gri A, Mazzanti L, Migliore G, Cutti AG. Development of Instrumented Running Prosthetic Feet for the Collection of Track Loads on Elite Athletes. SENSORS (BASEL, SWITZERLAND) 2020; 20:s20205758. [PMID: 33050513 PMCID: PMC7601311 DOI: 10.3390/s20205758] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 09/24/2020] [Accepted: 10/04/2020] [Indexed: 06/11/2023]
Abstract
Knowledge of loads acting on running specific prostheses (RSP), and in particular on running prosthetic feet (RPF), is crucial for evaluating athletes' technique, designing safe feet, and biomechanical modelling. The aim of this work was to develop a J-shaped and a C-shaped wearable instrumented running prosthetic foot (iRPF) starting from commercial RPF, suitable for load data collection on the track. The sensing elements are strain gauge bridges mounted on the foot in a configuration that allows decoupling loads parallel and normal to the socket-foot clamp during the stance phase. The system records data on lightweight athlete-worn loggers and transmits them via Wi-Fi to a base station for real-time monitoring. iRPF calibration procedure and static and dynamic validation of predicted ground-reaction forces against those measured by a force platform embedded in the track are reported. The potential application of this wearable system in estimating determinants of sprint performance is presented.
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Affiliation(s)
- Nicola Petrone
- Department of Industrial Engineering, University of Padova, Via Venezia 1, 35131 Padova, Italy; (G.C.); (G.F.); (A.G.); (L.M.)
| | - Gianfabio Costa
- Department of Industrial Engineering, University of Padova, Via Venezia 1, 35131 Padova, Italy; (G.C.); (G.F.); (A.G.); (L.M.)
| | - Gianmario Foscan
- Department of Industrial Engineering, University of Padova, Via Venezia 1, 35131 Padova, Italy; (G.C.); (G.F.); (A.G.); (L.M.)
| | - Antonio Gri
- Department of Industrial Engineering, University of Padova, Via Venezia 1, 35131 Padova, Italy; (G.C.); (G.F.); (A.G.); (L.M.)
| | - Leonardo Mazzanti
- Department of Industrial Engineering, University of Padova, Via Venezia 1, 35131 Padova, Italy; (G.C.); (G.F.); (A.G.); (L.M.)
| | - Gianluca Migliore
- INAIL, Via Rabuina 14, 40054 Vigorso di Budrio, Italy; (G.M.); (A.G.C.)
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20
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Johnson CD, Tenforde AS, Outerleys J, Reilly J, Davis IS. Impact-Related Ground Reaction Forces Are More Strongly Associated With Some Running Injuries Than Others. Am J Sports Med 2020; 48:3072-3080. [PMID: 32915664 DOI: 10.1177/0363546520950731] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Inconsistent associations have been reported for impact-related ground reaction force variables and running injuries when grouping all injuries together. However, previous work has shown more consistent associations when focusing on specific injuries. PURPOSE To compare ground reaction force variables between healthy and injured runners as a group and within specific common injuries. STUDY DESIGN Controlled laboratory study. METHODS A total of 125 runners presenting with patellofemoral pain, tibial bone stress injury, plantar fasciitis, Achilles tendinopathy, or iliotibial band syndrome and 65 healthy controls completed an instrumented treadmill assessment at a self-selected speed. Impact-related ground reaction force variables included vertical average (VALR) and instantaneous (VILR) load rates, posterior and medial/lateral instantaneous load rates, and vertical stiffness at initial loading (VSIL). Mean comparisons were made between the general and specific injury and control groups (α = .05). Cutoff thresholds were established and evaluated using several criteria. RESULTS VALR (+17.5%; P < .01), VILR (+15.8%; P < .01), and VSIL (+19.7%; P < .01) were significantly higher in the overall injured versus control groups. For individual injuries, VALR, VILR, and VSIL were significantly higher for patellofemoral pain (+23.4%-26.4%; P < .01) and plantar fasciitis (+17.5%-29.0%; P < .01), as well as VSIL for Achilles tendinopathy (+29.4%; P < .01). Cutoff thresholds showed better diagnostic criteria for individual versus grouped injuries. CONCLUSION Impact variables (VALR, VILR, and VSIL) were significantly higher when assessing the injured group as a whole. However, these findings were driven by specific injury groups, highlighting the importance of taking an injury-specific approach to biomechanical risk factors for running injury. CLINICAL RELEVANCE These results suggest that practitioners may want to address impact loading in their treatment of injured runners, especially in those with patellofemoral pain and plantar fasciitis.
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Affiliation(s)
- Caleb D Johnson
- Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, Massachusetts, USA
| | - Adam S Tenforde
- Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, Massachusetts, USA
| | - Jereme Outerleys
- Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, Massachusetts, USA
| | - Julia Reilly
- Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, Massachusetts, USA
| | - Irene S Davis
- Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, Massachusetts, USA
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21
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Pirscoveanu CI, Dam P, Brandi A, Bilgram M, Oliveira AS. Fatigue-related changes in vertical impact properties during normal and silent running. J Sports Sci 2020; 39:421-429. [PMID: 32951516 DOI: 10.1080/02640414.2020.1824340] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Running while minimizing sound volume can reduce vertical impact loading, potentially reducing injury risks. Fatigue can increase the vertical loading rate during running, but it is unknown whether fatigue influences silent running similarly. This study aimed to explore the differences in vertical impact properties during normal and silent running following a fatiguing task. Seventeen participants performed overground running (normal and silent) before and after a fatiguing running protocol. Running footfall sounds were collected using four microphones surrounding a force platform on the track. Peak impact sound, vertical impact peak force (IPF), instantaneous (VILR), and average vertical loading rate (VALR) were compared from Pre- to Post-fatigue. Peak impact sounds were significantly greater for fatigued runners during normal running when compared to silent running (p < 0.005), without changes in force parameters. Moreover, peak impact sounds, IPF, VILR, and VALR from normal running were greater when compared to silent running (p < 0.001), both fresh or fatigued. Our results suggest that fatigue may not compromise silent running technique, which may be relevant to reduce early vertical impact loading. Therefore, runners seeking to modify running style towards the reduction of impact loading may benefit from including silent running drills in their training sessions.
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Affiliation(s)
| | - Peter Dam
- Department of Health Science and Technology, Aalborg University , Aalborg, Denmark
| | - August Brandi
- Department of Health Science and Technology, Aalborg University , Aalborg, Denmark
| | - Malthe Bilgram
- Department of Health Science and Technology, Aalborg University , Aalborg, Denmark
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22
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Xu D, Cen X, Wang M, Rong M, István B, Baker JS, Gu Y. Temporal Kinematic Differences between Forward and Backward Jump-Landing. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17186669. [PMID: 32933208 PMCID: PMC7559031 DOI: 10.3390/ijerph17186669] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 09/04/2020] [Accepted: 09/11/2020] [Indexed: 12/14/2022]
Abstract
Backward jump-landing during sports performance will result in dynamic postural instability with a greater risk of injury, and most research studies have focused on forward landing. Differences in kinematic temporal characteristics between single-leg and double-leg backward jump-landing are seldom researched and understood. The purpose of this study was to compare and analyze lower extremity kinematic differences throughout the landing phases of forward and backward jumping using single-leg and double-leg landings (FS and BS, FD and BD). Kinematic data were collected during the landing phases of FS and BS, FD and BD in 45 participants. Through statistical parametric mapping (SPM) analysis, we found that the BS showed smaller hip and knee flexion and greater vertical ground reactive force (VGRF) than the FS during 0–37.42% (p = 0.031), 16.07–32.11% (p = 0.045), and 23.03–17.32% (p = 0.041) landing phases. The BD showed smaller hip and knee flexion than the FD during 0–20.66% (p = 0.047) and 0–100% (p < 0.001) landing phases. Most differences appeared within a time frame during the landing phase at 30–50 ms in which non-contact anterior cruciate ligament (ACL) injuries are thought to occur and are consistent with the identification of risk in biomechanical analysis. A landing strategy that consciously increases the knee and hip flexion angles during backward landing should be considered for people as a measure to avoid injury during the performance of this type of physical activity.
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Affiliation(s)
- Datao Xu
- Faculty of Sports Science, Ningbo University, Ningbo 315211, China; (D.X.); (X.C.)
| | - Xuanzhen Cen
- Faculty of Sports Science, Ningbo University, Ningbo 315211, China; (D.X.); (X.C.)
| | - Meizi Wang
- Savaria Institute of Technology, Eötvös Loránd University, 9700 Szombathely, Hungary;
| | - Ming Rong
- Faculty of Sports Science, Ningbo University, Ningbo 315211, China; (D.X.); (X.C.)
- Correspondence: (M.R.); (Y.G.); Tel.: +86-574-87600456 (M.R.); +86-574-87600208 (Y.G.)
| | - Bíró István
- Faculty of Engineering, University of Szeged, 6724 Szeged, Hungary;
| | - Julien S. Baker
- Centre for Health and Exercise Science Research, Hong Kong Baptist University, Hong Kong 999077, China;
| | - Yaodong Gu
- Faculty of Sports Science, Ningbo University, Ningbo 315211, China; (D.X.); (X.C.)
- Correspondence: (M.R.); (Y.G.); Tel.: +86-574-87600456 (M.R.); +86-574-87600208 (Y.G.)
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23
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Abstract
Running is one of the most accessible physical activities and long-distance running has attracted extensive attention in the past several years. While the incidence of running injuries, especially to the lower extremities, has increased. The objective of this study was to investigate the differences in ground reaction forces (GRF) and kinematic param between long-distance runners before and after long-distance running on treadmill (TM), asphalt road (AR), and plastic track (PT). Eight-camera Vicon motion analysis system was used to measure the hip, knee and ankle motion param of 10 healthy male subjects at a speed of 2.8 ± 0.2m/s. The hip, knee and ankle kinematics and the relationship of joint angles of lower limbs in the sagittal plane, coronal plane and transversal plane were analyzed. Ground reaction force (GRF) was collected using an AMTI force platform. The results showed that there were no significant differences in GRF and average loading rate (VALR). There was no significant difference in the range of motion (ROM) of ankle and hip after long-distance running on three surfaces compared to pre-test. Compared with stance-period of pre-test, the stance-period of AR and PT were significantly longer. Post hoc analyses exhibited the stance-period of AR and PT were longer than TM. In conclusion, runners can adjust different joints angles to maintain a similar GRF during long-distance running on different sports surfaces.
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24
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Hobara H, Sakata H, Amma R, Hisano G, Hashizume S, Baum BS, Usui F. Loading rates in unilateral transfemoral amputees with running-specific prostheses across a range of speeds. Clin Biomech (Bristol, Avon) 2020; 75:104999. [PMID: 32339944 DOI: 10.1016/j.clinbiomech.2020.104999] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 04/06/2020] [Accepted: 04/08/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND Understanding the potential risks of running-related injuries in unilateral transfemoral amputees contributes to the development and implementation of the injury prevention programme in running gait rehabilitation. We investigated the vertical ground reaction force loading in unilateral transfemoral amputees who used running-specific prostheses across a range of running speeds. METHODS Ten unilateral transfemoral amputees and ten non-amputees performed running trials on an instrumented treadmill at the incremental speeds of 30, 40, 50, and 60% of their maximum acquired speeds. Per-step and cumulative vertical instantaneous loading rates were calculated from the vertical ground reaction force in the affected, unaffected, and non-amputated control limbs. FINDINGS Both the per-step and cumulative vertical instantaneous loading rates of the unaffected limbs in runners with unilateral transfemoral amputation were significantly greater than the affected and non-amputated control limbs at all speeds. INTERPRETATION The results of the present study suggest that runners with unilateral transfemoral amputation may be exposed to a greater risk of running-related injuries in their unaffected limbs compared to the affected and non-amputated control limbs.
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Affiliation(s)
- Hiroaki Hobara
- National Institute of Advanced Industrial Science and Technology, Tokyo, Japan.
| | - Hiroyuki Sakata
- National Institute of Advanced Industrial Science and Technology, Tokyo, Japan; Tokyo University of Science, Chiba, Japan
| | - Ryo Amma
- National Institute of Advanced Industrial Science and Technology, Tokyo, Japan; Tokyo University of Science, Chiba, Japan
| | - Genki Hisano
- National Institute of Advanced Industrial Science and Technology, Tokyo, Japan; Tokyo Institute of Technology, Tokyo, Japan
| | - Satoru Hashizume
- National Institute of Advanced Industrial Science and Technology, Tokyo, Japan
| | | | - Fumio Usui
- Tetsudou Kousaikai Foundation, Tokyo, Japan
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Derie R, Robberechts P, Van den Berghe P, Gerlo J, De Clercq D, Segers V, Davis J. Tibial Acceleration-Based Prediction of Maximal Vertical Loading Rate During Overground Running: A Machine Learning Approach. Front Bioeng Biotechnol 2020; 8:33. [PMID: 32117918 PMCID: PMC7010603 DOI: 10.3389/fbioe.2020.00033] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 01/15/2020] [Indexed: 11/23/2022] Open
Abstract
Ground reaction forces are often used by sport scientists and clinicians to analyze the mechanical risk-factors of running related injuries or athletic performance during a running analysis. An interesting ground reaction force-derived variable to track is the maximal vertical instantaneous loading rate (VILR). This impact characteristic is traditionally derived from a fixed force platform, but wearable inertial sensors nowadays might approximate its magnitude while running outside the lab. The time-discrete axial peak tibial acceleration (APTA) has been proposed as a good surrogate that can be measured using wearable accelerometers in the field. This paper explores the hypothesis that applying machine learning to time continuous data (generated from bilateral tri-axial shin mounted accelerometers) would result in a more accurate estimation of the VILR. Therefore, the purpose of this study was to evaluate the performance of accelerometer-based predictions of the VILR with various machine learning models trained on data of 93 rearfoot runners. A subject-dependent gradient boosted regression trees (XGB) model provided the most accurate estimates (mean absolute error: 5.39 ± 2.04 BW⋅s–1, mean absolute percentage error: 6.08%). A similar subject-independent model had a mean absolute error of 12.41 ± 7.90 BW⋅s–1 (mean absolute percentage error: 11.09%). All of our models had a stronger correlation with the VILR than the APTA (p < 0.01), indicating that multiple 3D acceleration features in a learning setting showed the highest accuracy in predicting the lab-based impact loading compared to APTA.
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Affiliation(s)
- Rud Derie
- Department of Movement and Sports Sciences, Ghent University, Ghent, Belgium
| | | | | | - Joeri Gerlo
- Department of Movement and Sports Sciences, Ghent University, Ghent, Belgium
| | - Dirk De Clercq
- Department of Movement and Sports Sciences, Ghent University, Ghent, Belgium
| | - Veerle Segers
- Department of Movement and Sports Sciences, Ghent University, Ghent, Belgium
| | - Jesse Davis
- Department of Computer Science, KU Leuven, Leuven, Belgium
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Isherwood J, Hughes L, Qian JY, Sterzing T. Biomechanical effects of continuous loop running in comparison to discontinuous runway running on locomotion and running shoe characterization. FOOTWEAR SCIENCE 2019. [DOI: 10.1080/19424280.2019.1696896] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Joshua Isherwood
- Sports Science and Engineering Laboratory, Xtep (China) Co. Ltd, Xiamen, China
| | - Liam Hughes
- Sports Science and Engineering Laboratory, Xtep (China) Co. Ltd, Xiamen, China
| | - Jie Yuan Qian
- Sports Science and Engineering Laboratory, Xtep (China) Co. Ltd, Xiamen, China
- Faculty of Sports Science, Ningbo University, Ningbo, China
| | - Thorsten Sterzing
- Sports Science and Engineering Laboratory, Xtep (China) Co. Ltd, Xiamen, China
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27
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Wearing SC, Davis IS, Brauner T, Hooper SL, Horstmann T. Do habitual foot-strike patterns in running influence functional Achilles tendon properties during gait? J Sports Sci 2019; 37:2735-2743. [PMID: 31506014 DOI: 10.1080/02640414.2019.1663656] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The capacity of foot-strike running patterns to influence the functional properties of the Achilles tendon is controversial. This study used transmission-mode ultrasound to investigate the influence of habitual running foot-strike pattern on Achilles tendon properties during barefoot walking and running. Fifteen runners with rearfoot (RFS) and 10 with a forefoot (FFS) foot-strike running pattern had ultrasound transmission velocity measured in the right Achilles tendon during barefoot walking (≈1.1 ms-1) and running (≈2.0 ms-1). Temporospatial gait parameters, ankle kinematics and vertical ground reaction force were simultaneously recorded. Statistical comparisons between foot-strike patterns were made using repeated measure ANOVAs. FFS was characterised by a significantly shorter stance duration (-4%), greater ankle dorsiflexion (+2°), and higher peak vertical ground reaction force (+20% bodyweight) than RFS running (P < .05). Both groups adopted a RFS pattern during walking, with only the relative timing of peak dorsiflexion (3%), ground reaction force (1-2%) and peak vertical force loading rates (22-23%) differing between groups (P < .05). Peak ultrasound transmission velocity in the Achilles tendon was significantly higher in FFS during walking (≈100 ms-1) and running (≈130 ms-1) than RFS (P < .05). Functional Achilles tendon properties differ with habitual footfall patterns in recreational runners.
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Affiliation(s)
- Scott C Wearing
- Institute of Health and Biomedical Innovation, Queensland University of Technology , Brisbane , Australia
| | - I S Davis
- Department of Physical Medicine and Rehabilitation, Harvard Medical School , Boston , USA
| | - T Brauner
- Faculty of Sports and Health Sciences, Technische Universität München , Munich , Germany
| | - S L Hooper
- Institute of Health and Biomedical Innovation, Queensland University of Technology , Brisbane , Australia
| | - T Horstmann
- Faculty of Sports and Health Sciences, Technische Universität München , Munich , Germany
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28
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Mei Q, Gu Y, Xiang L, Baker JS, Fernandez J. Foot Pronation Contributes to Altered Lower Extremity Loading After Long Distance Running. Front Physiol 2019; 10:573. [PMID: 31191329 PMCID: PMC6540596 DOI: 10.3389/fphys.2019.00573] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 04/24/2019] [Indexed: 11/15/2022] Open
Abstract
This study presents an investigation of the changes in foot posture, joint kinematics, joint moments and joint contact forces in the lower extremity following a 5 k treadmill run. A relationship between knee and ankle joint loading and foot posture index (FPI) is developed. Twenty recreational male heel-strike runners participated in this study. All participants had a history of running exercise and were free from lower extremity injuries and foot deformities. Foot posture was assessed from a six-item FPI to quantitatively classify high supination to high pronation foot poses. The FPI is scored using a combination of observations and foot palpations. The three-dimensional marker trajectories, ground reaction force and surface electromyography (EMG) were recorded at pre and post-gait sessions conducted over-ground and 5 k running was conducted on a treadmill. Joint kinematics, joint moments and joint contact forces were computed in OpenSim. Simulated EMG activations were compared against experimental EMG to validate the model. A paired sample t-test was conducted using a 1D statistical parametric mapping method computed temporally. Hip joint moments and contact forces increased during initial foot contact following 5 k running. Knee abduction moment and superior-inferior knee contact force increased, whereas the knee extension moment decreased. Ankle plantarflexion moment and ankle contact forces increased during stance. FPI was found to be moderately correlated with peak knee and ankle moments. Recreational male runners presented increased static foot pronation after 5 k treadmill running. These findings suggest that following mid distance running foot pronation may be an early indicator of increased lower limb joint loading. Furthermore, the FPI may be used to quantify the changes in knee and ankle joint moments.
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Affiliation(s)
- Qichang Mei
- Faculty of Sports Science, Ningbo University, Ningbo, China
- Research Academy of Grand Health, Ningbo University, Ningbo, China
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| | - Yaodong Gu
- Faculty of Sports Science, Ningbo University, Ningbo, China
- Research Academy of Grand Health, Ningbo University, Ningbo, China
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| | - Liangliang Xiang
- Faculty of Sports Science, Ningbo University, Ningbo, China
- Research Academy of Grand Health, Ningbo University, Ningbo, China
| | - Julien S. Baker
- Faculty of Sports Science, Ningbo University, Ningbo, China
- Institute for Clinical Exercise and Health Science, University of the West of Scotland, Paisley, United Kingdom
| | - Justin Fernandez
- Faculty of Sports Science, Ningbo University, Ningbo, China
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
- Department of Engineering Science, University of Auckland, Auckland, New Zealand
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29
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Zhang S, Li Y, Li L. Running ground reaction force complexity at the initial stance phase increased with ageing. Sports Biomech 2019; 20:619-628. [PMID: 30942127 DOI: 10.1080/14763141.2019.1596300] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Running mechanics could be influenced by some degenerative musculoskeletal changes associated with ageing. However, the shoe effect on ground reaction force (GRF) amplitude and complexity of older runners is still unclear. The objective of our study was to assess the effects of age and shoe on amplitude and complexity of GRF during treadmill running. In total, 20 healthy runners were recruited. GRF data were collected for 13 younger runners and seven older runners during running on an instrumented treadmill at 3.5 m/s. Maximum vertical loading rate and GRF variables were generated. Sample entropy of GRF during the first 20% of the stance phase was calculated to assess GRF complexity. Age and shoe type did not significantly affect the maximal loading rate and GRF. Older participants exhibited higher anteroposterior and vertical GRF sample entropy compared to younger runners. In conclusion, the amplitudes of GRF were not influenced by age group, which indicated that muscle strength in the older runners tested could fulfil mechanical demand (e.g., shock absorption, force generation) during running. However, the increased GRF complexity in initial stance phase with ageing could be a result of reduced muscle contraction coordination and smoothness of force production.
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Affiliation(s)
- Shuqi Zhang
- College of Human Movement Science, Beijing Sport University, Beijing, China.,Department of Kinesiology and Physical Education, Northern Illinois University, DeKalb, IL, USA
| | - Yumeng Li
- Department of Health and Human Performance, Texas State University, San Marcos, TX, USA
| | - Li Li
- Department of Health Sciences and Kinesiology, Georgia Southern University, Statesboro, GA, USA
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Van den Berghe P, Six J, Gerlo J, Leman M, De Clercq D. Validity and reliability of peak tibial accelerations as real-time measure of impact loading during over-ground rearfoot running at different speeds. J Biomech 2019; 86:238-242. [DOI: 10.1016/j.jbiomech.2019.01.039] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 01/22/2019] [Accepted: 01/22/2019] [Indexed: 10/27/2022]
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31
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SHIH YO, TENG HSIANGLING, POWERS CHRISTOPHERM. Lower Extremity Stiffness Predicts Ground Reaction Force Loading Rate in Heel Strike Runners. Med Sci Sports Exerc 2019; 51:1692-1697. [DOI: 10.1249/mss.0000000000001963] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Breine B, Malcolm P, Galle S, Fiers P, Frederick EC, De Clercq D. Running speed-induced changes in foot contact pattern influence impact loading rate. Eur J Sport Sci 2018; 19:774-783. [PMID: 30394188 DOI: 10.1080/17461391.2018.1541256] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Purpose. We aimed to determine the effect of speed-induced changes in foot contact patterns on the vertical instantaneous loading rate (VILR). We hypothesized that transition runners, i.e. runners that shift towards a mid- (MF) or forefoot contact pattern (FF) when running speed increases, show smaller increases in VILR than non-transition runners, i.e. runners that remain with a rearfoot contact pattern (RF). Methods. Fifty-two male and female runners ran overground at 3.2, 4.1, 5.1 and 6.2 m s-1. Ground reaction forces, lower limb sagittal plane knee and ankle kinematics and plantar pressures were recorded. Multi-level linear regression models were used to assess differences between transition and non-transition runners. Results. Non-transition runners experienced larger speed-induced increases in VILR (48.6 ± 2.6 BW s-1 per m s-1) than transition runners (-1.4 ± 7.6 BW s-1 per m s-1). Transition runners showed higher VILRs and a more flat foot touch down at the same pre-transition speed than non-transition runners. Conclusion. When running speed increases, some runners transition towards more anterior foot contact patterns. This reduces or even eliminates the speed-induced increase in VILR. This result is especially the case for those RF runners who already have relatively high VILRs and flat foot positioning at slower running speeds.
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Affiliation(s)
- Bastiaan Breine
- a Department of Movement and Sports Sciences , Ghent University , Gent , Belgium
| | - Philippe Malcolm
- b Department of Biomechanics and Center for Research in Human Movement Variability , University of Nebraska at Omaha , Omaha , NE , USA
| | - Samuel Galle
- a Department of Movement and Sports Sciences , Ghent University , Gent , Belgium
| | - Pieter Fiers
- a Department of Movement and Sports Sciences , Ghent University , Gent , Belgium
| | | | - Dirk De Clercq
- a Department of Movement and Sports Sciences , Ghent University , Gent , Belgium
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33
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Law MHC, Choi EMF, Law SHY, Chan SSC, Wong SMS, Ching ECK, Chan ZYS, Zhang JH, Lam GWK, Lau FOY, Cheung RTH. Effects of footwear midsole thickness on running biomechanics. J Sports Sci 2018; 37:1004-1010. [PMID: 30358487 DOI: 10.1080/02640414.2018.1538066] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Shoe manufacturers launch running shoes with increased (e.g., maximalists) or decreased (e.g., minimalists) midsole thickness and claim that they may prevent running injury. Previous studies tested footwear models with different midsole thicknesses on the market but the shoe construct was not strictly comparable. Therefore, in the present study, we examined the effect of midsole thickness, from 1-mm to 29-mm, in a standard test shoe prototype on the vertical loading rates, footstrike angle and temporal spatial parameters in distance runners. Fifteen male habitual rearfoot strikers were recruited from local running clubs. They were asked to run on an instrumented treadmill in shoes with different midsole thicknesses. We found significant interactions between midsole thickness with vertical loading rates (p < 0.001), footstrike angle (p = 0.013), contact time (p < 0.001), cadence (p = 0.003), and stride length (p = 0.004). Specifically, shoes with thinner midsole (1- and 5-mm) significantly increased the vertical loading rates and shortened the contact time, when compared with thicker midsole shoes (25- and 29-mm). However, we did not observe any substantial differences in the footstrike angle, cadence and stride length between other shod conditions. The present study provides biomechanical data regarding the relationship between full spectrum midsole thicknesses and running biomechanics in a group of rearfoot strikers.
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Affiliation(s)
- Mark H C Law
- a Gait & Motion Analysis Laboratory, Department of Rehabilitation Sciences , The Hong Kong Polytechnic University , Hong Kong, China
| | - Eric M F Choi
- a Gait & Motion Analysis Laboratory, Department of Rehabilitation Sciences , The Hong Kong Polytechnic University , Hong Kong, China
| | - Stephanie H Y Law
- a Gait & Motion Analysis Laboratory, Department of Rehabilitation Sciences , The Hong Kong Polytechnic University , Hong Kong, China
| | - Subrina S C Chan
- a Gait & Motion Analysis Laboratory, Department of Rehabilitation Sciences , The Hong Kong Polytechnic University , Hong Kong, China
| | - Sonia M S Wong
- a Gait & Motion Analysis Laboratory, Department of Rehabilitation Sciences , The Hong Kong Polytechnic University , Hong Kong, China
| | - Eric C K Ching
- a Gait & Motion Analysis Laboratory, Department of Rehabilitation Sciences , The Hong Kong Polytechnic University , Hong Kong, China
| | - Zoe Y S Chan
- a Gait & Motion Analysis Laboratory, Department of Rehabilitation Sciences , The Hong Kong Polytechnic University , Hong Kong, China
| | - Janet H Zhang
- a Gait & Motion Analysis Laboratory, Department of Rehabilitation Sciences , The Hong Kong Polytechnic University , Hong Kong, China
| | - Gilbert W K Lam
- b Department of Kinesiology , Shenyang Sport University , Shenyang , China.,c Li Ning Sports Research Center , Beijing , China
| | - Fannie O Y Lau
- a Gait & Motion Analysis Laboratory, Department of Rehabilitation Sciences , The Hong Kong Polytechnic University , Hong Kong, China.,d Department of Orthopaedics & Traumatology , The Chinese University of Hong , Hong Kong , China
| | - Roy T H Cheung
- a Gait & Motion Analysis Laboratory, Department of Rehabilitation Sciences , The Hong Kong Polytechnic University , Hong Kong, China
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34
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Malisoux L, Gette P, Urhausen A, Bomfim J, Theisen D. Influence of sports flooring and shoes on impact forces and performance during jump tasks. PLoS One 2017; 12:e0186297. [PMID: 29020108 PMCID: PMC5636165 DOI: 10.1371/journal.pone.0186297] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 09/28/2017] [Indexed: 11/18/2022] Open
Abstract
We aim to determine the influence of sports floorings and sports shoes on impact mechanics and performance during standardised jump tasks. Twenty-one male volunteers performed ankle jumps (four consecutive maximal bounds with very dynamic ankle movements) and multi-jumps (two consecutive maximal counter-movement jumps) on force plates using minimalist and cushioned shoes under 5 sports flooring (SF) conditions. The shock absorption properties of the SF, defined as the proportion of peak impact force absorbed by the tested flooring when compared with a concrete hard surface, were: SF0 = 0% (no flooring), SF1 = 19%, SF2 = 26%, SF3 = 37% and SF4 = 45%. Shoe and flooring effects were compared using 2x5 repeated-measures ANOVA with post-hoc Bonferroni-corrected comparisons. A significant interaction between SF and shoe conditions was found for VILR only (p = 0.003). In minimalist shoes, SF influenced Vertical Instantaneous Loading Rate (VILR) during ankle jumps (p = 0.006) and multi-jumps (p<0.001), in accordance with shock absorption properties. However, in cushioned shoes, SF influenced VILR during ankle jumps only (p<0.001). Contact Time was the only additional variable affected by SF, but only during multi-jumps in minimalist shoes (p = 0.037). Cushioned shoes induced lower VILR (p<0.001) and lower Contact Time (p≤0.002) during ankle jumps and multi-jumps compared to minimalist shoes. During ankle jumps, cushioned shoes induced greater Peak Vertical Ground Reaction Force (PVGRF, p = 0.002), greater Vertical Average Loading Rate (p<0.001), and lower eccentric (p = 0.008) and concentric (p = 0.004) work. During multi-jumps, PVGRF was lower (p<0.001) and jump height was higher (p<0.001) in cushioned compared to minimalist shoes. In conclusion, cushioning influenced impact forces during standardised jump tasks, whether it was provided by the shoes or the sports flooring. VILR is the variable that was the most affected.
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Affiliation(s)
- Laurent Malisoux
- Sports Medicine Research Laboratory, Luxembourg Institute of Health, Luxembourg, Grand-Duchy of Luxembourg
- * E-mail:
| | - Paul Gette
- Sports Medicine Research Laboratory, Luxembourg Institute of Health, Luxembourg, Grand-Duchy of Luxembourg
| | - Axel Urhausen
- Sports Medicine Research Laboratory, Luxembourg Institute of Health, Luxembourg, Grand-Duchy of Luxembourg
- Sports Clinic, Centre Hospitalier de Luxembourg, Luxembourg, Grand-Duchy of Luxembourg
| | - Joao Bomfim
- Mondo Luxembourg SA, Foetz, Grand-Duchy of Luxembourg
| | - Daniel Theisen
- Sports Medicine Research Laboratory, Luxembourg Institute of Health, Luxembourg, Grand-Duchy of Luxembourg
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