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Martinez E, Hoogkamer W, Powell DW, Paquette MR. The Influence of "Super-Shoes" and Foot Strike Pattern on Metabolic Cost and Joint Mechanics in Competitive Female Runners. Med Sci Sports Exerc 2024; 56:1337-1344. [PMID: 38376997 DOI: 10.1249/mss.0000000000003411] [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: 02/22/2024]
Abstract
PURPOSE The objective of this study is to assess the influence of "super-shoes" on metabolic cost and joint mechanics in competitive female runners and to understand how foot strike pattern may influence the footwear effects. METHODS Eighteen competitive female runners ran four 5-min bouts on a force instrumented treadmill at 12.9 km·h -1 in 1) Nike Vaporfly Next% 2™ (SUPER) and 2) Nike Pegasus 38™ (CON) in a randomized and mirrored order. RESULTS Metabolic power was improved by 4.2% ( P < 0.001; d = 0.43) and metatarsophalangeal (MTP) negative work ( P < 0.001; d = 1.22), ankle negative work ( P = 0.001; d = 0.67), and ankle positive work ( P < 0.001; d = 0.97) were all smaller when running in SUPER compared with CON. There was no correlation between foot strike pattern and the between-shoe (CON to SUPER) percentage change for metabolic power ( r = 0.093, P = 0.715). CONCLUSIONS Metabolic power improved by 4.2% in "super-shoes" (but only by ~3.2% if controlling for shoe mass differences) in this cohort of competitive female runners, which is a smaller improvement than previously observed in men. The reduced mechanical demand at the MTP and ankle in "super-shoes" are consistent with previous literature and may explain or contribute to the metabolic improvements observed in "super-shoes"; however, foot strike pattern was not a moderating factor for the metabolic improvements of "super-shoes." Future studies should directly compare the metabolic response among different types of "super-shoes" between men and women.
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Affiliation(s)
| | - Wouter Hoogkamer
- School of Public Health and Health Sciences, University of Massachusetts, Amherst, MA
| | | | - Max R Paquette
- College of Health Sciences, University of Memphis, Memphis, TN
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Lu R, Chen H, Huang J, Ye J, Gao L, Liu Q, Quan W, Gu Y. Biomechanical Investigation of Lower Limbs during Slope Transformation Running with Different Longitudinal Bending Stiffness Shoes. SENSORS (BASEL, SWITZERLAND) 2024; 24:3902. [PMID: 38931685 PMCID: PMC11207841 DOI: 10.3390/s24123902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Revised: 06/06/2024] [Accepted: 06/12/2024] [Indexed: 06/28/2024]
Abstract
BACKGROUND During city running or marathon races, shifts in level ground and up-and-down slopes are regularly encountered, resulting in changes in lower limb biomechanics. The longitudinal bending stiffness of the running shoe affects the running performance. PURPOSE This research aimed to investigate the biomechanical changes in the lower limbs when transitioning from level ground to an uphill slope under different longitudinal bending stiffness (LBS) levels in running shoes. METHODS Fifteen male amateur runners were recruited and tested while wearing three different LBS running shoes. The participants were asked to pass the force platform with their right foot at a speed of 3.3 m/s ± 0.2. Kinematics data and GRFs were collected synchronously. Each participant completed and recorded ten successful experiments per pair of shoes. RESULTS The range of motion in the sagittal of the knee joint was reduced with the increase in the longitudinal bending stiffness. Positive work was increased in the sagittal plane of the ankle joint and reduced in the keen joint. The negative work of the knee joint increased in the sagittal plane. The positive work of the metatarsophalangeal joint in the sagittal plane increased. CONCLUSION Transitioning from running on a level surface to running uphill, while wearing running shoes with high LBS, could lead to improved efficiency in lower limb function. However, the higher LBS of running shoes increases the energy absorption of the knee joint, potentially increasing the risk of knee injuries. Thus, amateurs should choose running shoes with optimal stiffness when running.
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Affiliation(s)
- Runhan Lu
- Faculty of Sports Science, Ningbo University, Ningbo 315211, China; (R.L.); (J.H.); (J.Y.); (Q.L.)
| | - Hairong Chen
- Doctoral School on Safety and Security Sciences, Óbuda University, 1034 Budapest, Hungary;
- Faculty of Engineering, University of Szeged, 6724 Szeged, Hungary
| | - Jialu Huang
- Faculty of Sports Science, Ningbo University, Ningbo 315211, China; (R.L.); (J.H.); (J.Y.); (Q.L.)
| | - Jingyi Ye
- Faculty of Sports Science, Ningbo University, Ningbo 315211, China; (R.L.); (J.H.); (J.Y.); (Q.L.)
| | - Lidong Gao
- Department of Material Science and Technology, Audi Hungaria Faculty of Automotive Engineering, Széchenyi István University, 9026 Győr, Hungary;
| | - Qian Liu
- Faculty of Sports Science, Ningbo University, Ningbo 315211, China; (R.L.); (J.H.); (J.Y.); (Q.L.)
- Doctoral School on Safety and Security Sciences, Óbuda University, 1034 Budapest, Hungary;
- Faculty of Engineering, University of Szeged, 6724 Szeged, Hungary
| | - Wenjing Quan
- Faculty of Sports Science, Ningbo University, Ningbo 315211, China; (R.L.); (J.H.); (J.Y.); (Q.L.)
| | - Yaodong Gu
- Faculty of Sports Science, Ningbo University, Ningbo 315211, China; (R.L.); (J.H.); (J.Y.); (Q.L.)
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Song Y, Cen X, Sun D, Bálint K, Wang Y, Chen H, Gao S, Bíró I, Zhang M, Gu Y. Curved carbon-plated shoe may further reduce forefoot loads compared to flat plate during running. Sci Rep 2024; 14:13215. [PMID: 38851842 PMCID: PMC11162459 DOI: 10.1038/s41598-024-64177-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Accepted: 06/05/2024] [Indexed: 06/10/2024] Open
Abstract
Using a curved carbon-fiber plate (CFP) in running shoes may offer notable performance benefit over flat plates, yet there is a lack of research exploring the influence of CFP geometry on internal foot loading during running. The objective of this study was to investigate the effects of CFP mechanical characteristics on forefoot biomechanics in terms of plantar pressure, bone stress distribution, and contact force transmission during a simulated impact peak moment in forefoot strike running. We employed a finite element model of the foot-shoe system, wherein various CFP configurations, including three stiffnesses (stiff, stiffer, and stiffest) and two shapes (flat plate (FCFP) and curved plate (CCFP)), were integrated into the shoe sole. Comparing the shoes with no CFP (NCFP) to those with CFP, we consistently observed a reduction in peak forefoot plantar pressure with increasing CFP stiffness. This decrease in pressure was even more notable in a CCFP demonstrating a further reduction in peak pressure ranging from 5.51 to 12.62%, compared to FCFP models. Both FCFP and CCFP designs had a negligible impact on reducing the maximum stress experienced by the 2nd and 3rd metatarsals. However, they greatly influenced the stress distribution in other metatarsal bones. These CFP designs seem to optimize the load transfer pathway, enabling a more uniform force transmission by mainly reducing contact force on the medial columns (the first three rays, measuring 0.333 times body weight for FCFP and 0.335 for CCFP in stiffest condition, compared to 0.373 in NCFP). We concluded that employing a curved CFP in running shoes could be more beneficial from an injury prevention perspective by inducing less peak pressure under the metatarsal heads while not worsening their stress state compared to flat plates.
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Affiliation(s)
- Yang Song
- Research Academy of Medicine Combining Sports, Ningbo No.2 Hospital, Ningbo, China
- Department of Biomedical Engineering, Faculty of Engineering, The Hong Kong Polytechnic University, Hong Kong, China
| | - Xuanzhen Cen
- Doctoral School on Safety and Security Sciences, Óbuda University, Budapest, Hungary
- Faculty of Engineering, University of Szeged, Szeged, Hungary
| | - Dong Sun
- Research Academy of Medicine Combining Sports, Ningbo No.2 Hospital, Ningbo, China
- Faculty of Sports Science, Ningbo University, Ningbo, China
| | - Kovács Bálint
- Research Academy of Medicine Combining Sports, Ningbo No.2 Hospital, Ningbo, China
- Faculty of Sports Science, Ningbo University, Ningbo, China
- Department of Kinesiology, Hungarian University of Sports Science, Budapest, Hungary
| | - Yan Wang
- Department of Biomedical Engineering, Faculty of Engineering, The Hong Kong Polytechnic University, Hong Kong, China
| | - Hairong Chen
- Doctoral School on Safety and Security Sciences, Óbuda University, Budapest, Hungary
- Faculty of Engineering, University of Szeged, Szeged, Hungary
| | - Shunxiang Gao
- Faculty of Sports Science, Ningbo University, Ningbo, China
| | - István Bíró
- Doctoral School on Safety and Security Sciences, Óbuda University, Budapest, Hungary
- Faculty of Engineering, University of Szeged, Szeged, Hungary
| | - Ming Zhang
- Department of Biomedical Engineering, Faculty of Engineering, The Hong Kong Polytechnic University, Hong Kong, China
| | - Yaodong Gu
- Research Academy of Medicine Combining Sports, Ningbo No.2 Hospital, Ningbo, China.
- Doctoral School on Safety and Security Sciences, Óbuda University, Budapest, Hungary.
- Faculty of Sports Science, Ningbo University, Ningbo, China.
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Hata K, Hamamura Y, Noro H, Yamazaki Y, Nagato S, Kanosue K, Yanagiya T. Plantar Flexor Muscle Activity and Fascicle Behavior in Gastrocnemius Medialis During Running in Highly Cushioned Shoes With Carbon-Fiber Plates. J Appl Biomech 2024; 40:192-200. [PMID: 38458184 DOI: 10.1123/jab.2023-0170] [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: 06/27/2023] [Revised: 12/18/2023] [Accepted: 01/09/2024] [Indexed: 03/10/2024]
Abstract
The purposes of this study were to clarify the electromyography (EMG) of plantar flexors and to analyze the fascicle and tendon behaviors of the gastrocnemius medialis (GM) during running in the carbon-fiber plate embedded in thicker midsole racing shoes, such as the Nike ZoomX Vaporfly (VF) and traditional racing shoes (TRAD). We compared the fascicle and series elastic element behavior of the GM and EMG of the lower limb muscles during running (14 km/h, 45 s) in athletes wearing VF or TRAD. GM EMGs in the push-off phase were approximately 50% lower in athletes wearing VF than in TRAD. Although the series elastic element behavior and/or mean fascicle-shortening velocity during the entire stance phase were not significantly different between VF and TRAD, a significant difference was found in both the mean EMG and integral EMG of the GM during the push-off phase. EMG of the gastrocnemius lateralis (GL) during the first half of the push-off phase was significantly different between VF and TRAD. Present results suggest that VF facilitates running propulsion, resulting in a decrease in GM and GL EMGs at a given running velocity during the push-off phase, leading to a reduction in metabolic cost.
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Affiliation(s)
- Keiichiro Hata
- Faculty of Health and Sports Science, Juntendo University, Chiba, Japan
| | - Yuta Hamamura
- Graduate School of Health and Sports Science, Juntendo University, Chiba, Japan
| | - Hiroaki Noro
- Faculty of Health and Sports Science, Juntendo University, Chiba, Japan
- Graduate School of Health and Sports Science, Juntendo University, Chiba, Japan
| | - Yohei Yamazaki
- Graduate School of Health and Sports Science, Juntendo University, Chiba, Japan
- Institute of Health and Sports Science & Medicine, Juntendo University, Chiba, Japan
| | - Shunsuke Nagato
- Faculty of Health and Sports Science, Juntendo University, Chiba, Japan
| | - Kazuyuki Kanosue
- Institute of Health and Sports Science & Medicine, Juntendo University, Chiba, Japan
| | - Toshio Yanagiya
- Faculty of Health and Sports Science, Juntendo University, Chiba, Japan
- Institute of Health and Sports Science & Medicine, Juntendo University, Chiba, Japan
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Matijevich ES, Honert EC, Yang F, Lam WK, Nigg BM. Greater foot and footwear mechanical work associated with less ankle joint work during running. Sports Biomech 2024:1-19. [PMID: 38164950 DOI: 10.1080/14763141.2023.2296916] [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: 06/05/2023] [Accepted: 11/23/2023] [Indexed: 01/03/2024]
Abstract
Footwear energy storage and return is often suggested as one explanation for metabolic energy savings when running in Advanced Athletic Footwear. However, there is no common understanding of how footwear energy storage and return facilitates changes in muscle and joint kinetics. The purpose of this study was to evaluate the magnitude and timing of foot, footwear and lower limb joint powers and work while running in Advanced and Traditional Athletic Footwear. Fifteen runners participated in an overground motion analysis study. Since footwear kinetics are methodologically challenging to quantify, we leveraged distal rearfoot power analyses ('foot + footwear' power) and evaluated changes in the magnitude and timing of foot + footwear power and lower limb joint powers. Running in Advanced Footwear resulted in greater foot + footwear work, compared to Traditional Shoes, and lower positive ankle work, potentially reducing the muscular demand on the runner. The timing of foot + footwear power varied only slightly across footwear. There are exciting innovation opportunities to manipulate the timing of footwear energy and return. This study demonstrates the research value of quantifying time-series foot + footwear power, and points industry developers towards footwear innovation opportunities.
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Affiliation(s)
- Emily S Matijevich
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, AB, Canada
| | - Eric C Honert
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, AB, Canada
| | - Fan Yang
- Li Ning Sports Research Center, Beijing, China
| | - Wing-Kai Lam
- Department of Kinesiology, Shenyang Sport University, Shenyang, China
| | - Benno M Nigg
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, AB, Canada
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6
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Beltran RT, Powell DW, Greenwood D, Paquette MR. The Influence of Footwear Longitudinal Bending Stiffness on Running Economy and Biomechanics in Older Runners. RESEARCH QUARTERLY FOR EXERCISE AND SPORT 2023; 94:1062-1072. [PMID: 36094795 DOI: 10.1080/02701367.2022.2114589] [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: 09/13/2021] [Accepted: 07/30/2022] [Indexed: 06/15/2023]
Abstract
Purpose: This study assessed the effects of footwear longitudinal bending stiffness on running economy and biomechanics of rearfoot striking older runners. Methods: Nine runners over 60 years of age completed two running bouts at their preferred running pace in each of three footwear conditions: low (4.4 ± 1.8 N·m-1), moderate (5.7 ± 1.7 N·m-1), and high (6.4 ± 1.6 N·m-1) bending stiffness. Testing order was randomized and a mirror protocol was used (i.e., A,B,C,C,B,A). Expired gases, lower limb kinematics, and ground reaction forces were collected simultaneously and lower limb joint kinetics, running economy (i.e., VO2), leg stiffness, and spatio-temporal variables were calculated. Results: Running economy was not different among stiffness conditions (p = 0.60, p = 0.53 [mass adjusted]). Greater footwear stiffness reduced step length (p = 0.046) and increased peak vertical ground reaction force (p = 0.019) but did not change peak ankle plantarflexor torque (p = 0.65), peak positive ankle power (p = 0.48), ankle positive work (p = 0.86), propulsive force (p = 0.081), and leg stiffness (p = 0.46). Moderate footwear stiffness yielded greater peak negative knee power compared to low (p = 0.04) and high (p = 0.03) stiffness. Conclusions: These novel findings demonstrate that increasing footwear longitudinal bending stiffness using flat carbon fiber inserts does not improve running economy and generally does not alter lower limb joint mechanics of rearfoot strike runners over 60 years. Future studies should investigate how other footwear characteristics (e.g., midsole material, plate location, and sole curvature) influence economy and biomechanics in this population.
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7
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Hoenig T, Saxena A, Rice HM, Hollander K, Tenforde AS. Navigating the challenges and opportunities with 'super shoes': balancing performance gains with injury risk. Br J Sports Med 2023; 57:1472-1473. [PMID: 37451705 DOI: 10.1136/bjsports-2023-106875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/01/2023] [Indexed: 07/18/2023]
Affiliation(s)
- Tim Hoenig
- Department of Trauma and Orthopaedic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | - Hannah M Rice
- Department of Physical Performance, Norwegian School of Sport Sciences, Oslo, Norway
| | | | - Adam S Tenforde
- Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, Massachusetts, USA
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8
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Mai P, Robertz L, Robbin J, Bill K, Weir G, Kurz M, Trudeau MB, Hollander K, Hamill J, Willwacher S. Towards functionally individualised designed footwear recommendation for overuse injury prevention: a scoping review. BMC Sports Sci Med Rehabil 2023; 15:152. [PMID: 37951935 PMCID: PMC10638717 DOI: 10.1186/s13102-023-00760-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Accepted: 10/25/2023] [Indexed: 11/14/2023]
Abstract
Injury prevention is essential in running due to the risk of overuse injury development. Tailoring running shoes to individual needs may be a promising strategy to reduce this risk. Novel manufacturing processes allow the production of individualised running shoes that incorporate features that meet individual biomechanical and experiential needs. However, specific ways to individualise footwear to reduce injury risk are poorly understood. Therefore, this scoping review provides an overview of (1) footwear design features that have the potential for individualisation; and (2) the literature on the differential responses to footwear design features between selected groups of individuals. These purposes focus exclusively on reducing the risk of overuse injuries. We included studies in the English language on adults that analysed: (1) potential interaction effects between footwear design features and subgroups of runners or covariates (e.g., age, sex) for running-related biomechanical risk factors or injury incidences; (2) footwear comfort perception for a systematically modified footwear design feature. Most of the included articles (n = 107) analysed male runners. Female runners may be more susceptible to footwear-induced changes and overuse injury development; future research should target more heterogonous sampling. Several footwear design features (e.g., midsole characteristics, upper, outsole profile) show potential for individualisation. However, the literature addressing individualised footwear solutions and the potential to reduce biomechanical risk factors is limited. Future studies should leverage more extensive data collections considering relevant covariates and subgroups while systematically modifying isolated footwear design features to inform footwear individualisation.
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Affiliation(s)
- Patrick Mai
- Institute of Biomechanics and Orthopaedics, German Sport University Cologne, Am Sportpark Müngersdorf 6, 50933, Cologne, Germany.
- Institute for Advanced Biomechanics and Motion Studies, Offenburg University, Offenburg, Germany.
- Department of Physical Performance, Norwegian School of Sports Sciences, Oslo, Norway.
| | - Leon Robertz
- Institute of Biomechanics and Orthopaedics, German Sport University Cologne, Am Sportpark Müngersdorf 6, 50933, Cologne, Germany
| | - Johanna Robbin
- Institute for Advanced Biomechanics and Motion Studies, Offenburg University, Offenburg, Germany
| | - Kevin Bill
- Institute of Biomechanics and Orthopaedics, German Sport University Cologne, Am Sportpark Müngersdorf 6, 50933, Cologne, Germany
| | - Gillian Weir
- Biomechanics Laboratory, University of Massachusetts Amherst, Amherst, MA, USA
| | - Markus Kurz
- Sports Tech Research Centre, Mid Sweden University, Östersund, Sweden
| | | | - Karsten Hollander
- Institute of Interdisciplinary Exercise Science and Sports Medicine, MSH Medical School Hamburg, Hamburg, Germany
| | - Joseph Hamill
- Biomechanics Laboratory, University of Massachusetts Amherst, Amherst, MA, USA
| | - Steffen Willwacher
- Institute of Biomechanics and Orthopaedics, German Sport University Cologne, Am Sportpark Müngersdorf 6, 50933, Cologne, Germany
- Institute for Advanced Biomechanics and Motion Studies, Offenburg University, Offenburg, Germany
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9
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Asmussen MJ. How to make the "jump" on understanding the importance of the intrinsic foot muscles for propulsion. JOURNAL OF SPORT AND HEALTH SCIENCE 2023; 12:648-650. [PMID: 36481572 PMCID: PMC10466181 DOI: 10.1016/j.jshs.2022.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 11/14/2022] [Accepted: 11/16/2022] [Indexed: 06/17/2023]
Affiliation(s)
- Michael J Asmussen
- Department of Biology, Faculty of Science & Technology, Mount Royal University, Calgary, AB T3E 6K6, Canada.
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10
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Rodrigo-Carranza V, González-Mohíno F, Santos-Concejero J, González-Ravé JM. Impact of advanced footwear technology on elite men's in the evolution of road race performance. J Sports Sci 2023; 40:2661-2668. [PMID: 36814065 DOI: 10.1080/02640414.2023.2183103] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Advanced footwear technology (AFT) changed footwear design concepts by using a curved carbon fibre plate in combination with new, more compliant and resilient foams. The aim of this study was (1) to examine the individual effects of AFT on the evolution of the main road events and (2) to re-assess the impact of AFT on the world's top-100 performance in men's 10k, half-marathon and marathon events. Data from the top-100 men's 10k, half-marathon and marathon performances were collected between 2015 and 2019. The shoes used by the athletes were identified in 93.1% of the cases by publicly available photographs. Runners wearing AFT had an average performance of 1671 ± 22.28 s compared to 1685 ± 18.97 s of runners not using AFT in 10k (0.83%) (p < 0.001), 3589 ± 29.79 s compared to 3607 ± 30.49 s in half-marathon (0.50%) (p < 0.001) and 7563 ± 86.10 s compared to 7637 ± 72.51 s in the marathon (0.97%) (p < 0.001). Runners wearing AFTs were faster by ~1% in the main road events compared to non-users. Individual analysis showed that ~25% of the runners did not benefit from the use of this type of footwear. The results of this study suggest that AFT has a clear positive impact on running performance in main road events.
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Affiliation(s)
| | - Fernando González-Mohíno
- Sport Training Lab. University of Castilla-La Mancha, Toledo, Spain.,Facultad de Ciencias de la Vida y de la Naturaleza, Universidad Nebrija, Madrid, Spain
| | - Jordan Santos-Concejero
- Department of Physical Education and Sport, University of the Basque Country UPV/EHU, Vitoria‑Gasteiz, Spain
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11
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Ardigò LP, Buglione A, Russo L, Cular D, Esposito F, Doria C, Padulo J. Marathon shoes vs. track spikes: a crossover pilot study on metabolic demand at different speeds in experienced runners. Res Sports Med 2023; 31:13-20. [PMID: 33988477 DOI: 10.1080/15438627.2021.1929225] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The aim of this study was to assess the metabolic cost (Cr) with marathon shoes (Adidas Adizero 3 [AA]) vs. track spikes (Nike Zoom Matumbo 3 [NZM]) on track. For this, five experienced runners were randomly assessed (NZM/AA) on a running track at 73% and 85% of best performance speed on 1500-m race. At first, speed (4.39 ± 0.53 m·s-1), Crs with AA and NZM resulted 3.63 ± 0.29 and 3.64 ± 0.43 J·kg-1·m-1 (+0.3% with NZM, effect size [ES] small and p = 0.951), respectively. Besides, at second speed (5.20 ± 0.18 m·s-1), Crs were 4.09 ± 0.28 and 4.07 ± 0.22 J·kg-1·m-1 (-0.5% with NZM, ES small and p = 0.919) with AA and NZM, respectively. It resulted in an increased Cr (+12.2%) between s1 and s2 with both shoe conditions (ES large and p = 0.009 and 0.011 with AA and NZM, respectively). There is a pattern yet to be confirmed for track spikes to become more beneficial at higher speeds (when duty factor becomes lower and therefore grip on track is crucial).
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Affiliation(s)
- Luca Paolo Ardigò
- School of Exercise and Sport Science, Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | - Antonio Buglione
- Department of Human Sciences and Promotion of the Quality of Life, San Raffaele Roma Open University, Rome, Italy
| | - Luca Russo
- Department of Biotechnology and Applied Clinical Science, University of L'Aquila, L'Aquila, Italy
| | - Drazen Cular
- Faculty of Kinesiology, University of Split, Split, Croatia.,"Einstein" Craft for Research, Development, Education, Trade and Services, Split, Croatia
| | - Fabio Esposito
- Department of Biomedical Sciences for Health, Università Degli Studi Di Milano, Milan, Italy.,IRCSS Istituto Ortopedico Galeazzi, Milano, Italy
| | - Christian Doria
- Department of Biomedical Sciences for Health, Università Degli Studi Di Milano, Milan, Italy
| | - Johnny Padulo
- Department of Biomedical Sciences for Health, Università Degli Studi Di Milano, Milan, Italy
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12
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Perrin TP, Morio CYM, Besson T, Kerhervé HA, Millet GY, Rossi J. Comparison of skin and shoe marker placement on metatarsophalangeal joint kinematics and kinetics during running. J Biomech 2023; 146:111410. [PMID: 36529092 DOI: 10.1016/j.jbiomech.2022.111410] [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: 01/25/2022] [Revised: 11/28/2022] [Accepted: 12/01/2022] [Indexed: 12/12/2022]
Abstract
This study investigated the effects of marker placement (skin- vs shoe-mounted) on metatarsophalangeal joint (MTP) kinematics and kinetics during running. Fifteen trained men ran on a 15-m track at 10 and 13 km/h with three (low, standard and high stiffness) shoe longitudinal bending stiffnesses (LBS). Reflective markers were fixed on the shoe upper, and on the skin using holes cut in the shoe. Three-dimensional marker positions and ground reaction forces were recorded at 200 and 2000 Hz, respectively. Kinematic and kinetic parameters were analyzed using one-dimensional metrics (statistical parametric mapping). MTP joint was less dorsiflexed at midstance ([57% to 100%] of braking phase and [0% to 48%] of pushing phase), and the MTP joint plantarflexion moment was higher ([22% to 55%] of pushing phase) with the shoe markerset in comparison with the skin markerset. The effect of LBS on MTP angle was found to be significant for a larger percentage of each stride using the shoe markerset compared to the skin markerset. However, the effect of LBS on plantarflexion moment was significant with the shoe markerset only. The effect of running speed on MTP angle was significant for a larger percentage of each stride with the skin markerset. This study demonstrates that the placement of markers influences the measurement of MTP kinematics and kinetics and that these effects are mediated by other variables such as LBS or running speed. It is concluded that the shoe markerset does not fully reflect the movement of the MTP joint.
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Affiliation(s)
- T P Perrin
- Univ Lyon, UJM-Saint-Etienne, Inter-university Laboratory of Human Movement Biology, EA 7424, F-42023 Saint-Etienne, France; ENS Rennes, Bruz, France
| | - C Y M Morio
- Decathlon SportsLab, Movement Sciences Department, Lille, France
| | - T Besson
- Univ Lyon, UJM-Saint-Etienne, Inter-university Laboratory of Human Movement Biology, EA 7424, F-42023 Saint-Etienne, France
| | - H A Kerhervé
- Univ Rennes, M2S - EA 7470, F-35000 Rennes, France
| | - G Y Millet
- Univ Lyon, UJM-Saint-Etienne, Inter-university Laboratory of Human Movement Biology, EA 7424, F-42023 Saint-Etienne, France; Institut Universitaire de France (IUF), France
| | - J Rossi
- Univ Lyon, UJM-Saint-Etienne, Inter-university Laboratory of Human Movement Biology, EA 7424, F-42023 Saint-Etienne, France.
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Nguyen AP, Gillain L, Delieux L, Detrembleur C, Mahaudens P, Esculier JF. Opinions about running shoes in runners and non-runners. FOOTWEAR SCIENCE 2022. [DOI: 10.1080/19424280.2022.2144468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Anh Phong Nguyen
- Institut de Recherche Expérimentale et Clinique, NeuroMusculoSkeletal Lab (NMSK), Université catholique de Louvain, Secteur des Sciences de la Santé, Brussels, Belgium
- The Running Clinic, Quebec, Canada
| | - Loris Gillain
- Institut de Recherche Expérimentale et Clinique, NeuroMusculoSkeletal Lab (NMSK), Université catholique de Louvain, Secteur des Sciences de la Santé, Brussels, Belgium
| | - Louise Delieux
- Institut de Recherche Expérimentale et Clinique, NeuroMusculoSkeletal Lab (NMSK), Université catholique de Louvain, Secteur des Sciences de la Santé, Brussels, Belgium
| | - Christine Detrembleur
- Institut de Recherche Expérimentale et Clinique, NeuroMusculoSkeletal Lab (NMSK), Université catholique de Louvain, Secteur des Sciences de la Santé, Brussels, Belgium
| | - Philippe Mahaudens
- Institut de Recherche Expérimentale et Clinique, NeuroMusculoSkeletal Lab (NMSK), Université catholique de Louvain, Secteur des Sciences de la Santé, Brussels, Belgium
- Service d’orthopédie et de traumatologie de l’appareil locomoteur, Cliniques universitaires Saint-Luc, Brussels, Belgium
- Service de médecine physique et réadaptation, Cliniques universitaires Saint-Luc, Brussels, Belgium
| | - Jean-François Esculier
- The Running Clinic, Quebec, Canada
- Department of Physical Therapy, University of British Columbia, Vancouver, Canada
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14
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Chen H, Shao E, Sun D, Xuan R, Baker JS, Gu Y. Effects of footwear with different longitudinal bending stiffness on biomechanical characteristics and muscular mechanics of lower limbs in adolescent runners. Front Physiol 2022; 13:907016. [PMID: 36060684 PMCID: PMC9437943 DOI: 10.3389/fphys.2022.907016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 07/01/2022] [Indexed: 12/03/2022] Open
Abstract
Background: Running shoes with carbon plates have been identified to have positive effects on improving running performance from a biomechanical perspective. However, the specific difference between the effects of carbon plates with different longitudinal bending stiffness (LBS)on biomechanical characteristics and muscular mechanics of lower limbs in adolescent runners remains unclear. This study aimed to identify the difference in biomechanical characteristics and muscular mechanics in lower limbs during running stance phases between wearing shoes with low longitudinal bending stiffness (Llbs) and high longitudinal bending stiffness (Hlbs) carbon plates in adolescent runners. Methods: 10 male adolescent runners with a habit of daily running exercise (age: 13.5 ± 0.6 years; height: 166.3 ± 1.9 cm; bodyweight: 50.8 ± 3.1 kg; foot length: 25.4 ± 0.2 cm) were recruited and asked to conduct two times of tests by wearing shoes with Llbs and Hlbs carbon plates in a randomized order. Paired t-test and statistical parametric mapping (SPM) analysis were used to identify the difference in biomechanical characteristics and muscular mechanics in lower limbs during running stance phases. Result: Under the condition of wearing shoes with Hlbs, the time of foot contact significantly increased, whereas the range of motion (ROM) of hip and metatarsophalangeal (MTP) in the sagittal plane significantly reduced as well as the peak moment of ankle joint in the sagittal plane. The activations of vastus medialis, vastus lateralis, flexor digitorum brevis (flex dig brevis), and flexor hallucis longus (flex hall long) significantly increased under the condition of wearing shoes with Hlbs. According to the results of the SPM analysis, the joint angles (hip, ankle, and MTP), the net joint moments (knee, ankle, and MTP), and the muscle forces (gluteus maximus and tibialis anterior) were significant difference during the running stance phase between conditions of wearing shoes with Hlbs and Llbs. Conclusion: Running shoes with Llb carbon plates are appropriate for adolescent runners due to the advantages of biomechanical characteristics and muscular mechanics.
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Affiliation(s)
- Hairong Chen
- Faculty of Sports Science, Ningbo University, Ningbo, China
| | - Enze Shao
- Faculty of Sports Science, Ningbo University, Ningbo, China
| | - Dong Sun
- Faculty of Sports Science, Ningbo University, Ningbo, China
| | - Rongrong Xuan
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo, China
- *Correspondence: Rongrong Xuan, ; Yaodong Gu,
| | - Julien S. Baker
- Department of Sport Physical Education and Health, Hong Kong Baptist University, Kowloon, Hong Kong SAR, China
- Center for Health and Exercise Science Research, Hong Kong Baptist University, Kowloon, Hong Kong SAR, China
| | - Yaodong Gu
- Faculty of Sports Science, Ningbo University, Ningbo, China
- *Correspondence: Rongrong Xuan, ; Yaodong Gu,
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15
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2021 ISB World Athletics Award for Biomechanics: The Subtalar Joint Maintains "Spring-Like" Function While Running in Footwear That Perturbs Foot Pronation. J Appl Biomech 2022; 38:221-231. [PMID: 35894959 DOI: 10.1123/jab.2021-0354] [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: 11/09/2021] [Revised: 05/05/2022] [Accepted: 05/14/2022] [Indexed: 11/18/2022]
Abstract
Humans have the remarkable ability to run over variable terrains. During locomotion, however, humans are unstable in the mediolateral direction and this instability must be controlled actively-a goal that could be achieved in more ways than one. Walking research indicates that the subtalar joint absorbs energy in early stance and returns it in late stance, an attribute that is credited to the tibialis posterior muscle-tendon unit. The purpose of this study was to determine how humans (n = 11) adapt to mediolateral perturbations induced by custom-made 3D-printed "footwear" that either enhanced or reduced pronation of the subtalar joint (modeled as motion in 3 planes) while running (3 m/s). In all conditions, the subtalar joint absorbed energy (ie, negative mechanical work) in early stance followed by an immediate return of energy (ie, positive mechanical work) in late stance, demonstrating a "spring-like" behavior. These effects increased and decreased in footwear conditions that enhanced or reduced pronation (P ≤ .05), respectively. Of the recorded muscles, the tibialis posterior (P ≤ .05) appeared to actively change its activation in concert with the changes in joint energetics. We suggest that the "spring-like" behavior of the subtalar joint may be an inherent function that enables the lower limb to respond to mediolateral instabilities during running.
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Honert EC, Ostermair F, von Tscharner V, Nigg BM. Changes in ankle work, foot work, and tibialis anterior activation throughout a long run. JOURNAL OF SPORT AND HEALTH SCIENCE 2022; 11:330-338. [PMID: 33662603 PMCID: PMC9189696 DOI: 10.1016/j.jshs.2021.02.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 10/19/2020] [Accepted: 12/22/2020] [Indexed: 06/12/2023]
Abstract
BACKGROUND The ankle and foot together contribute to over half of the positive and negative work performed by the lower limbs during running. Yet, little is known about how foot kinetics change throughout a run. The amount of negative foot work may decrease as tibialis anterior (TA) electromyography (EMG) changes throughout longer-duration runs. Therefore, we examined ankle and foot work as well as TA EMG changes throughout a changing-speed run. METHODS Fourteen heel-striking subjects ran on a treadmill for 58 min. We collected ground reaction forces, motion capture, and EMG. Subjects ran at 110%, 100%, and 90% of their 10-km running speed and 2.8 m/s multiple times throughout the run. Foot work was evaluated using the distal rearfoot work, which provides a net estimate of all work contributors within the foot. RESULTS Positive foot work increased and positive ankle work decreased throughout the run at all speeds. At the 110% 10-km running speed, negative foot work decreased and TA EMG frequency shifted lower throughout the run. The increase in positive foot work may be attributed to increased foot joint work performed by intrinsic foot muscles. Changes in negative foot work and TA EMG frequency may indicate that the TA plays a role in negative foot work in the early stance of a run. CONCLUSION This study is the first to examine how the kinetic contributions of the foot change throughout a run. Future studies should investigate how increases in foot work affect running performance.
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Affiliation(s)
- Eric C Honert
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Alberta T2N 1N4, Canada.
| | - Florian Ostermair
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Alberta T2N 1N4, Canada; Institute of Sports and Sports Science, Karlsruhe Institute of Technology, Karlsruhe 76131, Germany; Department of Sports Science and Sports, Friedrich Alexander University Erlangen-Nuremberg, Erlangen 91058, Germany
| | - Vinzenz von Tscharner
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Alberta T2N 1N4, Canada
| | - Benno M Nigg
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Alberta T2N 1N4, Canada
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Hébert-Losier K, Finlayson SJ, Driller MW, Dubois B, Esculier JF, Beaven CM. Metabolic and performance responses of male runners wearing 3 types of footwear: Nike Vaporfly 4%, Saucony Endorphin racing flats, and their own shoes. JOURNAL OF SPORT AND HEALTH SCIENCE 2022; 11:275-284. [PMID: 33264686 PMCID: PMC9189709 DOI: 10.1016/j.jshs.2020.11.012] [Citation(s) in RCA: 38] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 09/02/2020] [Accepted: 10/22/2020] [Indexed: 06/01/2023]
Abstract
PURPOSE We compared running economy (RE) and 3-km time-trial (TT) variables of runners wearing Nike Vaporfly 4% (VP4), Saucony Endorphin lightweight racing flats (FLAT), and their habitual running (OWN) footwear. METHODS Eighteen male recreational runners (age = 33.5 ± 11.9 year (mean ± SD), peak oxygen uptake (VO2peak) = 55.8 ± 4.4 mL/kg·min) attended 4 sessions approximately 7 days apart. The first session consisted of a VO2peak test to inform subsequent RE speeds set at 60%, 70%, and 80% of the speed eliciting VO2peak. In subsequent sessions, treadmill RE and 3-km TTs were assessed in the 3 footwear conditions in a randomized, counterbalanced crossover design. RESULTS Oxygen consumption (mL/kg·min) was less in VP4 (from 4.3% to 4.4%, p ≤ 0.002) and FLAT (from 2.7% to 3.4%, p ≤ 0.092) vs. OWN across intensities, with a non-significant difference between VP4 and FLAT (1.0%-1.7%, p ≥ 0.292). Findings related to energy cost (W/kg) and energetics cost of transport (J/kg·m) were comparable. VP4 3-km TT performance (11:07.6 ± 0:56.6 mm:ss) was enhanced vs. OWN by 16.6 s (2.4%, p = 0.005) and vs. FLAT by 13.0 s (1.8%, p = 0.032). The 3-km times between OWN and FLAT (0.5%, p = 0.747) were similar. Most runners (n = 11, 61%) ran their fastest TT in VP4. CONCLUSION Overall, VP4 improved laboratory-based RE measures in male recreational runners at relative speeds compared to OWN, but the RE improvements in VP4 were not significant vs. FLAT. More runners exhibited better treadmill TT performances in VP4 (61%) vs. FLAT (22%) and OWN (17%). The variability in RE (-10.3% to 13.3%) and TT (-4.7% to 9.3%) improvements suggests that responses to different types of shoes are individualized and warrant further investigation.
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Affiliation(s)
- Kim Hébert-Losier
- Division of Health, Engineering, Computing and Science, Te Huataki Waiora School of Health, University of Waikato, Mount Maunganui, Tauranga 3116, New Zealand.
| | - Steven J Finlayson
- Division of Health, Engineering, Computing and Science, Te Huataki Waiora School of Health, University of Waikato, Mount Maunganui, Tauranga 3116, New Zealand
| | - Matthew W Driller
- Division of Health, Engineering, Computing and Science, Te Huataki Waiora School of Health, University of Waikato, Mount Maunganui, Tauranga 3116, New Zealand; Sport and Exercise Science, School of Allied Health, Human Services and Sport, La Trobe University, Melbourne, VIC 3086, Australia
| | - Blaise Dubois
- Research & Development, the Running Clinic, Lac-Beauport, QC G3B 2J8, Canada
| | | | - Christopher Martyn Beaven
- Division of Health, Engineering, Computing and Science, Te Huataki Waiora School of Health, University of Waikato, Mount Maunganui, Tauranga 3116, New Zealand
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18
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Healey LA, Hoogkamer W. Longitudinal bending stiffness does not affect running economy in Nike Vaporfly Shoes. JOURNAL OF SPORT AND HEALTH SCIENCE 2022; 11:285-292. [PMID: 34280602 PMCID: PMC9189697 DOI: 10.1016/j.jshs.2021.07.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 04/23/2021] [Accepted: 06/03/2021] [Indexed: 05/31/2023]
Abstract
PURPOSE This study aimed to determine the independent effect of the curved carbon-fiber plate in the Nike Vaporfly 4% shoe on running economy and running biomechanics. METHODS Fifteen healthy male runners completed a metabolic protocol and a biomechanics protocol. In both protocols participants wore 2 different shoes, an intact Nike Vaporfly 4% (VFintact) and a cut Nike Vaporfly 4% (VFcut). The VFcut had 6 medio-lateral cuts through the carbon-fiber plate in the forefoot to reduce the effectiveness of the plate. In the metabolic protocol, participants ran at 14 km/h for 5 min, twice with each shoe, on a force-measuring treadmill while we measured metabolic rate. In the biomechanics protocol, participants ran across a runway with embedded force plates at 14 km/h. We calculated running economy, kinetics, and lower limb joint mechanics. RESULTS Running economy did not significantly differ between shoe conditions (on average, 0.55% ± 1.77% (mean ± SD)) worse in the VFcut compared to the VFintact; 95% confidence interval (-1.44% to 0.40%). Biomechanical differences were only found in the metatarsophalangeal (MTP) joint with increased MTP dorsiflexion angle, angular velocity, and negative power in the VFcut. Contact time was 1% longer in the VFintact. CONCLUSION Cutting the carbon-fiber plate and reducing the longitudinal bending stiffness did not have a significant effect on the energy savings in the Nike Vaporfly 4%. This suggests that the plate's stiffening effect on the MTP joint plays a limited role in the reported energy savings, and instead savings are likely from a combination and interaction of the foam, geometry, and plate.
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Affiliation(s)
- Laura A Healey
- Integrative Locomotion Laboratory, Department of Kinesiology, University of Massachusetts, Amherst, MA 01003-9258, USA.
| | - Wouter Hoogkamer
- Integrative Locomotion Laboratory, Department of Kinesiology, University of Massachusetts, Amherst, MA 01003-9258, USA
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Cigoja S, Fletcher JR, Nigg BM. Can changes in midsole bending stiffness of shoes affect the onset of joint work redistribution during a prolonged run? JOURNAL OF SPORT AND HEALTH SCIENCE 2022; 11:293-302. [PMID: 33359799 PMCID: PMC9189708 DOI: 10.1016/j.jshs.2020.12.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 10/23/2020] [Accepted: 11/27/2020] [Indexed: 05/14/2023]
Abstract
PURPOSE This study aimed to investigate if changing the midsole bending stiffness of athletic footwear can affect the onset of lower limb joint work redistribution during a prolonged run. METHODS Fifteen trained male runners (10-km time of <44 min) performed 10-km runs at 90% of their individual speed at lactate threshold (i.e., when change in lactate exceeded 1 mmol/L during an incremental running test) in a control and stiff shoe condition on 2 occasions. Lower limb joint kinematics and kinetics were measured using a motion capture system and a force-instrumented treadmill. Data were acquired every 500 m. RESULTS Prolonged running resulted in a redistribution of positive joint work from distal to proximal joints in both shoe conditions. Compared to the beginning of the run, less positive work was performed at the ankle (approximately 9%; p ≤ 0.001) and more positive work was performed at the knee joint (approximately 17%; p ≤ 0.001) at the end of the run. When running in the stiff shoe condition, the onset of joint work redistribution at the ankle and knee joints occurred at a later point during the run. CONCLUSION A delayed onset of joint work redistribution in the stiff condition may result in less activated muscle volume, because ankle plantar flexor muscles have shorter muscles fascicles and smaller cross-sectional areas compared to knee extensor muscles. Less active muscle volume could be related to previously reported decreases in metabolic cost when running in stiff footwear. These results contribute to the notion that footwear with increased stiffness likely results in reductions in metabolic cost by delaying joint work redistribution from distal to proximal joints.
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Affiliation(s)
- Sasa Cigoja
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, AB T2N 1N4, Canada.
| | - Jared R Fletcher
- Department of Health and Physical Education, Mount Royal University, Calgary, AB T3E 6K6, Canada
| | - Benno M Nigg
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, AB T2N 1N4, Canada
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20
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Quan W, Ren F, Xu D, Gusztav F, Baker JS, Gu Y. Effects of Fatigue Running on Joint Mechanics in Female Runners: A Prediction Study Based on a Partial Least Squares Algorithm. Front Bioeng Biotechnol 2021; 9:746761. [PMID: 34631685 PMCID: PMC8497745 DOI: 10.3389/fbioe.2021.746761] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Accepted: 09/13/2021] [Indexed: 11/21/2022] Open
Abstract
Background: Joint mechanics are permanently changed using different intensities and running durations. These variations in intensity and duration also influence fatigue during prolonged running. Little is known about the potential interactions between fatigue and joint mechanics in female recreational runners. Thus, the purpose of this study was to describe and examine kinematic and joint mechanical parameters when female recreational runners are subject to fatigue as a result of running. Method: Fifty female recreational runners maintained running on a treadmill to induce fatigue conditions. Joint mechanics, sagittal joint angle, moment, and power were recorded pre- and immediately post fatigue treadmill running. Result: Moderate reductions in absolute positive ankle power, total ankle energy dissipation, dorsiflexion at initial contact, max dorsiflexion angle, and range of motion of the joint ankle were collected after fatigue following prolonged fatigue running. Knee joint mechanics, joint angle, and joint power remained unchanged after prolonged fatigue running. Nevertheless, with the decreased ankle joint work, negative knee power increased. At the hip joint, the extension angle was significantly decreased. The range motion of the hip joint, hip positive work and hip positive power were increased during the post-prolonged fatigue running. Conclusion: This study found no proximal shift in knee joint mechanics in amateur female runners following prolonged fatigue running. The joint work redistribution was associated with running fatigue changes. As for long-distance running, runners should include muscle strength training to avoid the occurrence of running-related injuries.
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Affiliation(s)
- Wenjing Quan
- Faculty of Sports Science, Ningbo University, Ningbo, China.,Savaria Institute of Technology, Eötvös Loránd University, Szombathely, Hungary
| | - Feng Ren
- Faculty of Sports Science, Ningbo University, Ningbo, China
| | - Datao Xu
- Faculty of Sports Science, Ningbo University, Ningbo, China
| | - Fekete Gusztav
- Savaria Institute of Technology, Eötvös Loránd University, Szombathely, Hungary
| | - Julien S Baker
- Centre for Health and Exercise Science Research, Department of Sport and Physical Education, Hong Kong Baptist University, Hong Kong, China
| | - Yaodong Gu
- Faculty of Sports Science, Ningbo University, Ningbo, China
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21
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Effects of Longitudinal Bending Stiffness of forefoot rocker profile shoes on ankle kinematics and kinetics. Gait Posture 2021; 90:326-333. [PMID: 34564006 DOI: 10.1016/j.gaitpost.2021.09.188] [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: 01/29/2021] [Revised: 08/27/2021] [Accepted: 09/16/2021] [Indexed: 02/02/2023]
Abstract
INTRODUCTION Rocker profile shoes with a proximally placed apex are currently one of the most prescribed shoe modifications for treatment and prevention of lower leg deficits. Three geometrical rocker design parameters apex position (AP), apex angle (AA) and rocker radius (RR) influence both plantar pressure redistribution and kinetic and kinematic alterations of the lower leg. In addition, longitudinal bending stiffness (LBS) of the outsole influences these parameters as well. This study aims to investigate the effects of the LBS in combination with different forefoot radii of rocker shoes on kinematics and kinetics of the lower limb. METHODS 10 participants walked in standard shoes and six experimental shoe conditions with high and low LBS and three different forefoot rocker radii with the same (proximal) AP and AA. Lower extremity kinematics and kinetics were collected while walking on an instrumented treadmill at preferred walking speed and analysed with a repeated measures ANOVA and Statistical Parametric Mapping (SPM) (α = .05; post hoc α = .05/6). RESULTS SPM analyses revealed no significant differences for LBS and interaction LBS*RR for most research variables in terminal stance (ankle angle, ankle moment, ankle power, foot-to-horizontal angle, shank-to-vertical angle, external ankle moment, ground reaction force angle). A significant LBS effect was found for anterior-posterior position of the centre of pressure during pre-swing and peak ankle dorsiflexion angle. No relevant significant differences were found in spatio-temporal parameters and total work at the ankle between low and high LBS. CONCLUSION This study showed that longitudinal bending stiffness does not affect the biomechanical working mechanism of rocker profile shoes as long as toe plantarflexion is restricted. Providing that the forefoot rocker radius supports at least a normal foot-to-horizontal angle at toe-off, there is no reason to increase sole stiffness to change ankle kinematics and kinetics.
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22
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Fu F, Levadnyi I, Wang J, Xie Z, Fekete G, Cai Y, Gu Y. Effect of the Construction of Carbon Fiber Plate Insert to Midsole on Running Performance. MATERIALS 2021; 14:ma14185156. [PMID: 34576379 PMCID: PMC8467156 DOI: 10.3390/ma14185156] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 08/26/2021] [Accepted: 08/30/2021] [Indexed: 11/16/2022]
Abstract
In this paper, to investigate the independent effect of the construction of the forefoot carbon-fiber plate inserted to the midsole on running biomechanics and finite element simulation, fifteen male marathon runners were arranged to run across a runway with embedded force plates at two specific running speeds (fast-speed: 4.81 ± 0.32 m/s, slow-speed: 3.97 ± 0.19 m/s) with two different experimental shoes (a segmented forefoot plate construction (SFC), and a full forefoot plate construction (FFC)), simulating the different pressure distributions, energy return, and stiffness during bending in the forefoot region between the SFC and FFC inserted to midsole. Kinetics and joint mechanics were analyzed. The results showed that the footwear with SFC significantly increased the peak metatarsophalangeal joint (MTPJ) plantarflexion velocity and positive work at the knee joint compared to the footwear with FFC. The results about finite element simulation showed a reduced maximum pressure on the midsole; meanwhile, not significantly affected was the longitudinal bending stiffness and energy return with the SFC compared to the FFC. The results can be used for the design of marathon running shoes, because changing the full carbon fiber plate to segment carbon fiber plate induced some biomechanical transformation but did not significantly affect the running performance, what is more, reducing the peak pressure of the carbon plate to the midsole by cutting the forefoot area of the carbon fiber plate could be beneficial from a long-distance running perspective for manufacturers.
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Affiliation(s)
- Fengqin Fu
- Faculty of Sports Science, Ningbo University, Ningbo 315000, China; (F.F.); (J.W.)
- Doctoral School on Safety and Security Sciences, Óbuda University, 1011-1239 Budapest, Hungary
- Xtep Sports Science & Engineering Laboratory, Xtep Co. Ltd., Xiamen 361000, China; (I.L.); (Z.X.); (Y.C.)
| | - Ievgen Levadnyi
- Xtep Sports Science & Engineering Laboratory, Xtep Co. Ltd., Xiamen 361000, China; (I.L.); (Z.X.); (Y.C.)
| | - Jiayu Wang
- Faculty of Sports Science, Ningbo University, Ningbo 315000, China; (F.F.); (J.W.)
| | - Zhihao Xie
- Xtep Sports Science & Engineering Laboratory, Xtep Co. Ltd., Xiamen 361000, China; (I.L.); (Z.X.); (Y.C.)
| | - Gusztáv Fekete
- Savaria Institute of Technology, Eötvös Loránd University, 9700 Szombathely, Hungary;
| | - Yuhui Cai
- Xtep Sports Science & Engineering Laboratory, Xtep Co. Ltd., Xiamen 361000, China; (I.L.); (Z.X.); (Y.C.)
| | - Yaodong Gu
- Faculty of Sports Science, Ningbo University, Ningbo 315000, China; (F.F.); (J.W.)
- Correspondence: ; Tel.: +86-574-87600208
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Bräuer S, Kiesewetter P, Milani TL, Mitschke C. The 'Ride' Feeling during Running under Field Conditions-Objectified with a Single Inertial Measurement Unit. SENSORS 2021; 21:s21155010. [PMID: 34372251 PMCID: PMC8348449 DOI: 10.3390/s21155010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 07/20/2021] [Accepted: 07/22/2021] [Indexed: 11/25/2022]
Abstract
Foot rollover and the ‘ride’ feeling that occurs during heel–toe transition during running have been investigated mostly in laboratory settings due to the technical requirements of ‘golden standard’ measurement devices. Hence, the purpose of the current study was to investigate ‘ride’ and rollover with a heel cap-mounted inertial measurement unit (IMU) when running under field conditions to get realistic results. Twenty athletes ran on a 1 km outdoor track with five different shoe conditions, only differing in their midsole bending stiffness. The peak angular velocity (PAV) in the sagittal plane of the shoe was analyzed. The subjective evaluation of the ‘ride’ perception during heel–toe transition was rated on a visual analogue scale. The results revealed that PAV and ‘ride’ varied for the different shoes. The regression analysis showed that PAV has a significant impact on the ‘ride’ rating (R2 = 0.952; p = 0.005). The shoe with a medium midsole bending stiffness had the lowest value for PAV (845.6 deg/s) and the best rating of perceived ‘ride’ on average. Our results show that IMU can be used as a low-cost method to investigate the heel–toe transition during field-running. In addition, we found that midsole bending stiffness influenced PAV and the subjective feeling of ‘ride’.
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Willwacher S, Lichtwark G, Cresswell AG, Kelly LA. Effects of midsole bending stiffness and shape on lower extremity joint work per distance in level, incline and decline running. FOOTWEAR SCIENCE 2021. [DOI: 10.1080/19424280.2021.1917672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Steffen Willwacher
- Institute for Biomechanics and Orthopaedics, German Sports University Cologne, Köln, Germany
| | - Glen Lichtwark
- School of Human Motion and Nutrition Sciences, The University of Queensland, Saint Lucia, Australia
| | - Andrew G. Cresswell
- School of Human Motion and Nutrition Sciences, The University of Queensland, Saint Lucia, Australia
| | - Luke A. Kelly
- School of Human Motion and Nutrition Sciences, The University of Queensland, Saint Lucia, Australia
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Sanno M, Epro G, Brüggemann GP, Willwacher S. Running into Fatigue: The Effects of Footwear on Kinematics, Kinetics, and Energetics. Med Sci Sports Exerc 2021; 53:1217-1227. [PMID: 33394899 DOI: 10.1249/mss.0000000000002576] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
PURPOSE Recent studies identified a redistribution of positive mechanical work from distal to proximal joints during prolonged runs, which might partly explain the reduced running economy observed with running-induced fatigue. Higher mechanical demand of plantar flexor muscle-tendon units, for example, through minimal footwear, can lead to an earlier onset of fatigue, which might affect the redistribution of lower extremity joint work during prolonged runs. Therefore, the purpose of this study was to examine the effects of a racing flat and cushioned running shoe on the joint-specific contributions to lower extremity joint work during a prolonged fatiguing run. METHODS On different days, 18 runners performed two 10-km runs with near-maximal effort in a racing flat and a cushioned shoe on an instrumented treadmill synchronized with a motion capture system. Joint kinetics and kinematics were calculated at 13 predetermined distances throughout the run. The effects of shoes, distance, and their interaction were analyzed using a two-factor repeated-measures ANOVA. RESULTS For both shoes, we found a redistribution of positive joint work from the ankle (-6%) to the knee (+3%) and the hip (+3%) throughout the entire run. Negative ankle joint work was higher (P < 0.01) with the racing flat compared with the cushioned shoe. Initial differences in foot strike patterns between shoes disappeared after 2 km of running distance. CONCLUSIONS Irrespective of the shoe design, alterations in the running mechanics occurred in the first 2 km of the run, which might be attributed to the existence of a habituation rather than fatigue effect. Although we did not find a difference between shoes in the fatigue-related redistribution of joint work from distal to more proximal joints, more systematical studies are needed to explore the effects of specific footwear design features.
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Affiliation(s)
| | - Gaspar Epro
- Sport and Exercise Science Research Center, School of Applied Sciences, London South Bank University, London, UNITED KINGDOM
| | - Gert-Peter Brüggemann
- Institute of Biomechanics and Orthopedics, German Sport University Cologne, Cologne, GERMANY
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Krupenevich RL, Clark WH, Ray SF, Takahashi KZ, Kashefsky HE, Franz JR. Effects of age and locomotor demand on foot mechanics during walking. J Biomech 2021; 123:110499. [PMID: 34015739 DOI: 10.1016/j.jbiomech.2021.110499] [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: 09/07/2020] [Revised: 04/26/2021] [Accepted: 05/02/2021] [Indexed: 01/09/2023]
Abstract
Older adults exhibit reductions in push-off power that are often attributed to deficits in plantarflexor force-generating capacity. However, growing evidence suggests that the foot may also contribute to push-off power during walking. Thus, age-related changes in foot structure and function may contribute to altered foot mechanics and ultimately reduced push-off power. The purpose of this paper was to quantify age-related differences in foot mechanical work during walking across a range of speeds and at a single fixed speed with varied demands for push-off power. 9 young and 10 older adults walked at 1.0, 1.2, and 1.4 m/s, and at 1.2 m/s with an aiding or impeding horizontal pulling force equal to 5% BW. We calculated foot work in Visual3D using a unified deformable foot model, accounting for contributions of structures distal to the hindfoot's center-of-mass. Older adults walked while performing less positive foot work and more negative net foot work (p < 0.05). Further, we found that the effect of age on mechanical work performed by the foot and the ankle-foot complex increased with increased locomotor demand (p < 0.05). Our findings suggest that during walking, age-related differences in foot mechanics may contribute to reduced push-off intensity via greater energy loss from distal foot structures, particularly during walking tasks with a greater demand for foot power generation. These findings are the first step in understanding the role of the foot in push-off power deficits in older adults and may serve as a roadmap for developing future low-cost mobility interventions.
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Affiliation(s)
- Rebecca L Krupenevich
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Chapel Hill, NC, USA.
| | - William H Clark
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Chapel Hill, NC, USA
| | - Samuel F Ray
- Department of Biomechanics, University of Nebraska at Omaha, Omaha, NE, USA
| | - Kota Z Takahashi
- Department of Biomechanics, University of Nebraska at Omaha, Omaha, NE, USA
| | - Howard E Kashefsky
- Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Jason R Franz
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Chapel Hill, NC, USA
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Energetics and Biomechanics of Running Footwear with Increased Longitudinal Bending Stiffness: A Narrative Review. Sports Med 2021; 51:873-894. [DOI: 10.1007/s40279-020-01406-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/29/2020] [Indexed: 10/21/2022]
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Subramanium A, Honert EC, Cigoja S, Nigg BM. The effects of shoe upper construction on mechanical ankle joint work during lateral shuffle movements. J Sports Sci 2021; 39:1791-1799. [PMID: 33749509 DOI: 10.1080/02640414.2021.1898174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Lateral shuffles are common movements in sports and are facilitated by the hip, knee, and ankle joints. Shoe uppers can change ankle kinetics during walking and running. However, it is not known how shoe upper modifications affect ankle kinetics during shuffling. The purpose of this study was to investigate the effects of shoe upper construction on mechanical ankle joint work during shuffling. It was hypothesized that a shoe with a reinforced upper will result in decreased negative ankle joint work. Twenty participants performed Maximal (MLST) and Submaximal Lateral Shuffle Tests (90% of MLST) in footwear with a minimal (MU) and reinforced upper (RU). Ground reaction forces and ankle kinematics were collected to compute ankle joint work. Performing lateral shuffles in the RU condition resulted in significantly reduced positive (MU: 0.62 ± 0.16 J/kg, RU: 0.55 ± 0.16 J/kg; p = 0.001, d = 0.44) and negative (MU: -0.60 ± 0.20 J/kg, RU: -0.53 ± 0.19 J/kg; p = 0.004, d = 0.41) ankle work. A decrease in positive and negative work could be a performance benefit, enabling the athlete to perform the same movement with a lower energy cost. More extreme upper interventions may yield even larger performance benefits.
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Affiliation(s)
- Ashna Subramanium
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Canada
| | - Eric C Honert
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Canada
| | - Sasa Cigoja
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Canada
| | - Benno M Nigg
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Canada
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Does running speed affect the response of joint level mechanics in non-rearfoot strike runners to footwear of varying longitudinal bending stiffness? Gait Posture 2021; 84:187-191. [PMID: 33360383 DOI: 10.1016/j.gaitpost.2020.11.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 11/10/2020] [Accepted: 11/30/2020] [Indexed: 02/02/2023]
Abstract
BACKGROUND Modifying the longitudinal bending stiffness (LBS) of footwear has become a popular method to improve sport performance. It has been demonstrated to influence running economy by altering lower extremity joint level mechanics. Previous studies have only examined within-participant effects at one running speed. RESEARCH QUESTION Do joint level mechanics differ in response to varying footwear LBS at a range of running speeds? METHODS This study utilized a cross-sectional repeated measure study design using a convenience sample. Ten well trained non-rearfoot strike male distance runners ran at 3.89, 4.70, and 5.56 m/s (14, 17, 20 km/hr) in footwear of three different LBS levels. Mechanics and energetics of the metatarsophalangeal joint (MTPJ), ankle, knee, and hip joints during stance phase were assessed using an 8-camera optical motion capture system (fs = 200 Hz), a force instrumented treadmill (fs = 1000 Hz) and standard inverse dynamics theory. RESULTS Range of motion and negative work decreased and angular stiffness increased for the MTPJ with increasing LBS at all speeds (p < .001). Peak MTPJ moment did not change at any speed in response to increased LBS. Negative work at the ankle decreased in the stiff shoe at 17 km/hr (p = .036). Peak ankle plantar flexion velocity decreased with increasing LBS at all speeds (p < .05). SIGNIFICANCE While changes in MTPJ mechanics were consistent across speeds, decreased negative ankle work was only observed at 17 km/hr in the stiff shoe, suggesting that perhaps tuned footwear LBS may need to focus primarily on metabolically beneficial changes in ankle plantar flexor mechanical behavior to improve performance in distance runners. Tuning footwear stiffness may also be beneficial to clinical populations, as clinicians seek to optimize their patients' locomotion economy.
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Increasing the midsole bending stiffness of shoes alters gastrocnemius medialis muscle function during running. Sci Rep 2021; 11:749. [PMID: 33436965 PMCID: PMC7804138 DOI: 10.1038/s41598-020-80791-3] [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: 06/30/2020] [Accepted: 12/28/2020] [Indexed: 01/30/2023] Open
Abstract
In recent years, increasing the midsole bending stiffness (MBS) of running shoes by embedding carbon fibre plates in the midsole resulted in many world records set during long-distance running competitions. Although several theories were introduced to unravel the mechanisms behind these performance benefits, no definitive explanation was provided so far. This study aimed to investigate how the function of the gastrocnemius medialis (GM) muscle and Achilles tendon is altered when running in shoes with increased MBS. Here, we provide the first direct evidence that the amount and velocity of GM muscle fascicle shortening is reduced when running with increased MBS. Compared to control, running in the stiffest condition at 90% of speed at lactate threshold resulted in less muscle fascicle shortening (p = 0.006, d = 0.87), slower average shortening velocity (p = 0.002, d = 0.93) and greater estimated Achilles tendon energy return (p ≤ 0.001, d = 0.96), without a significant change in GM fascicle work (p = 0.335, d = 0.40) or GM energy cost (p = 0.569, d = 0.30). The findings of this study suggest that running in stiff shoes allows the ankle plantarflexor muscle-tendon unit to continue to operate on a more favourable position of the muscle's force-length-velocity relationship by lowering muscle shortening velocity and increasing tendon energy return.
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Uddin KZ, Youssef G, Trkov M, Seyyedhosseinzadeh H, Koohbor B. Gradient optimization of multi-layered density-graded foam laminates for footwear material design. J Biomech 2020; 109:109950. [PMID: 32807338 DOI: 10.1016/j.jbiomech.2020.109950] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 07/03/2020] [Accepted: 07/08/2020] [Indexed: 10/23/2022]
Abstract
Several sports-related injuries and orthopedic treatments need the necessity of corrective shoes that can assuage the excessive pressure on sensitive locations of the foot. In the present work, we study the mechanical and energy absorption characteristics of density-graded foams designed for shoe midsoles. The stress-strain responses of polyurea foams with relative densities (nominal density of foam divided by the density of water) of 0.095, 0.23, and 0.35 are obtained experimentally and used as input to a semi-analytical model. Using this model, three-layered foam laminates with various gradients are designed and characterized in terms of their weight, strength, and energy absorption properties. We show that, in comparison with monolithic foams, significant improvement in strength and energy absorption performance can be achieved through density gradation. Our findings also suggest that there is not a single gradient that offers a superior combination of strength, energy absorption, and weight. Rather, an optimal gradient depends on the plantar location and pressure. Depending on the magnitude of the local plantar pressure, density gradients that lead to the highest specific energy absorption are identified for normal walking and running conditions.
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Affiliation(s)
- Kazi Zahir Uddin
- Department of Mechanical Engineering, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, USA
| | - George Youssef
- Experimental Mechanics Laboratory, Department of Mechanical Engineering, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Mitja Trkov
- Department of Mechanical Engineering, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, USA
| | - Hamid Seyyedhosseinzadeh
- Orthopedic Research Group, School of Osteopathic Medicine, Rowan University, 201 S. Broadway, Camden, NJ 08103, USA
| | - Behrad Koohbor
- Department of Mechanical Engineering, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, USA.
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32
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Nigg BM, Cigoja S, Nigg SR. Effects of running shoe construction on performance in long distance running. FOOTWEAR SCIENCE 2020. [DOI: 10.1080/19424280.2020.1778799] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Benno M. Nigg
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Canada
| | - Sasa Cigoja
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Canada
| | - Sandro R. Nigg
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Canada
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33
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McLeod AR, Bruening D, Johnson AW, Ward J, Hunter I. Improving running economy through altered shoe bending stiffness across speeds. FOOTWEAR SCIENCE 2020. [DOI: 10.1080/19424280.2020.1734870] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
| | | | | | - Jared Ward
- Exercise Sciences, Brigham Young University, Provo, UT, USA
| | - Iain Hunter
- Exercise Sciences, Brigham Young University, Provo, UT, USA
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34
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Cigoja S, Asmussen MJ, Firminger CR, Fletcher JR, Edwards WB, Nigg BM. The Effects of Increased Midsole Bending Stiffness of Sport Shoes on Muscle-Tendon Unit Shortening and Shortening Velocity: a Randomised Crossover Trial in Recreational Male Runners. SPORTS MEDICINE - OPEN 2020; 6:9. [PMID: 32030489 PMCID: PMC7005237 DOI: 10.1186/s40798-020-0241-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 01/31/2020] [Indexed: 11/25/2022]
Abstract
BACKGROUND Individual compliances of the foot-shoe interface have been suggested to store and release elastic strain energy via ligamentous and tendinous structures or by increased midsole bending stiffness (MBS), compression stiffness, and resilience of running shoes. It is unknown, however, how these compliances interact with each other when the MBS of a running shoe is increased. The purpose of this study was to investigate how structures of the foot-shoe interface are influenced during running by changes to the MBS of sport shoes. METHODS A randomised crossover trial was performed, where 13 male, recreational runners ran on an instrumented treadmill at 3.5 m·s-1 while motion capture was used to estimate foot arch, plantar muscle-tendon unit (pMTU), and shank muscle-tendon unit (sMTU) behaviour in two conditions: (1) control shoe and (2) the same shoe with carbon fibre plates inserted to increase the MBS. RESULTS Running in a shoe with increased MBS resulted in less deformation of the arch (mean ± SD; stiff, 7.26 ± 1.78°; control, 8.84 ± 2.87°; p ≤ 0.05), reduced pMTU shortening (stiff, 4.39 ± 1.59 mm; control, 6.46 ± 1.42 mm; p ≤ 0.01), and lower shortening velocities of the pMTU (stiff, - 0.21 ± 0.03 m·s-1; control, - 0.30 ± 0.05 m·s-1; p ≤ 0.01) and sMTU (stiff, - 0.35 ± 0.08 m·s-1; control, - 0.45 ± 0.11 m·s-1; p ≤ 0.001) compared to a control condition. The positive and net work performed at the arch and pMTU, and the net work at the sMTU were significantly lower in the stiff compared to the control condition. CONCLUSION The findings of this study showed that if a compliance of the foot-shoe interface is altered during running (e.g. by increasing the MBS of a shoe), the mechanics of other structures change as well. This could potentially affect long-distance running performance.
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Affiliation(s)
- Sasa Cigoja
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada.
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada.
| | - Michael J Asmussen
- Department of Biology, Faculty of Science & Technology, Mount Royal University, Calgary, AB, Canada
| | - Colin R Firminger
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada
- Biomedical Engineering Graduate Program, University of Calgary, Calgary, AB, Canada
| | - Jared R Fletcher
- Department of Health and Physical Education, Mount Royal University, Calgary, AB, Canada
| | - W Brent Edwards
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada
- Biomedical Engineering Graduate Program, University of Calgary, Calgary, AB, Canada
| | - Benno M Nigg
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada
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