{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,30]],"date-time":"2026-08-30T13:14:32Z","timestamp":1788095672108,"version":"build-2803163510"},"reference-count":36,"publisher":"Journal of Sports Science and Medicine","license":[{"start":{"date-parts":[[2026,9,1]],"date-time":"2026-09-01T00:00:00Z","timestamp":1788220800000},"content-version":"am","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["jsportscimed"],"abstract":"<jats:p>&lt;p&gt;The objective of the study was to compare conventional biomechanical outcomes, movement regularity, and local dynamic stability among habitual rearfoot strikers during acute non-rearfoot-strike adoption (HRFS-AN) and after 12 weeks of gait retraining (HRFS-GR), and habitual non-rearfoot strikers (HNRFS). Thirty-three male recreational runners enrolled. Analyses included 13 habitual rearfoot strikers assessed during acute NRFS adoption and after 12 weeks of gait retraining, together with 14 HNRFS. Participants ran on a treadmill at 9 km\u00b7h\u207b&lt;sup&gt;1&lt;\/sup&gt; while ground reaction forces and lower-limb kinematics were recorded. Coefficient of variation (CV), sample entropy (SampEn), and largest Lyapunov exponent (LyE) were used to characterize discrete kinematic variability, temporal regularity, and local dynamic stability, respectively. Runners in all three states adopted an NRFS pattern. HRFS-AN showed a more anterior foot strike than HRFS-GR and HNRFS. Peak vertical ground reaction force and most spatiotemporal and discrete kinematic outcomes did not differ among states; selected joint angle and CV outcomes differed, while VILR and VALR were lower in HRFS-AN than in HRFS-GR. Compared with HRFS-AN, HRFS-GR and HNRFS exhibited lower SampEn for sagittal-plane knee and ankle motion and vertical COM motion, and lower LyE for sagittal-plane knee and vertical COM motion. Compared with HNRFS, HRFS-GR exhibited higher SampEn for sagittal-plane knee and transverse-plane hip motion and higher LyE for sagittal-plane knee and coronal-plane hip motion. Most conventional biomechanical outcomes were similar among states; however, HRFS-AN exhibited a more anterior foot strike than HRFS-GR and HNRFS, as well as lower VILR and VALR than HRFS-GR. Compared with acute adoption, the retrained state showed greater regularity and local dynamic stability in selected knee, ankle, and COM trajectories, although selected differences from HNRFS remained. These findings suggest that a gradual 12-week gait-retraining programme may be an appropriate approach for transitioning habitual rearfoot strikers to NRFS.&lt;\/p&gt;<\/jats:p>","DOI":"10.52082\/jssm.2026.822","type":"journal-article","created":{"date-parts":[[2026,8,30]],"date-time":"2026-08-30T13:09:08Z","timestamp":1788095348000},"page":"822-837","source":"Crossref","is-referenced-by-count":0,"title":["Movement Regularity and Local Dynamic Stability During Acute and 12-Week Retrained Non-Rearfoot-Strike Running Compared to Habitual Non-Rearfoot-Strike Running"],"prefix":"10.52082","author":[{"given":"Kaicheng","family":"Wu","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Liqin","family":"Deng","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xini","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bokai","family":"Suo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zeyu","family":"Lu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiaze","family":"He","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fan","family":"Yang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Weijie","family":"Fu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"29163","published-online":{"date-parts":[[2026,9,1]]},"reference":[{"key":"ref0","unstructured":"Altman, A.R., Davis, I.S. (2012) A kinematic method for footstrike pattern detection in barefoot and shod runners. Gait &#x0026; Posture 35, 298-300."},{"key":"ref1","unstructured":"Ekizos, A., Santuz, A., Arampatzis, A. (2017) Transition from shod to barefoot alters dynamic stability during running. Gait &#x0026; Posture 56, 31-36."},{"key":"ref2","unstructured":"Ekizos, A., Santuz, A., Arampatzis, A. (2018) Short- and long-term effects of altered point of ground reaction force application on human running energetics. Journal of Experimental Biology 221."},{"key":"ref3","unstructured":"Futrell, E.E., Gross, K.D., Reisman, D., Mullineaux, D.R., Davis, I.S. (2020) Transition to forefoot strike reduces load rates more effectively than altered cadence. Journal of Sport and Health Science 9, 248-257."},{"key":"ref4","unstructured":"Green, P., MacLeod, C.J. (2016) SIMR: an R package for power analysis of generalized linear mixed models by simulation. Methods in Ecology and Evolution 7, 493-498."},{"key":"ref5","unstructured":"Hasegawa, H., Yamauchi, T., Kraemer, W.J. (2007) Foot strike patterns of runners at the 15-km point during an elite-level half marathon. Journal of Strength and Conditioning Research 21, 888-893."},{"key":"ref6","unstructured":"Hollander, K., Hamacher, D., Zech, A. (2021) Running barefoot leads to lower running stability compared to shod running - results from a randomized controlled study. Scientific Reports 11, 4376."},{"key":"ref7","unstructured":"Hunter, B., Greenhalgh, A., Karsten, B., Burnley, M., Muniz-Pumares, D. (2021) A non-linear analysis of running in the heavy and severe intensity domains. European Journal of Applied Physiology 121, 1297-1313."},{"key":"ref8","unstructured":"Hunter, B., Karsten, B., Greenhalgh, A., Burnley, M., Muniz-Pumares, D. (2023) The application of non-linear methods to quantify changes to movement dynamics during running: A scoping review. Journal of Sports Sciences 41, 481-494."},{"key":"ref9","unstructured":"Krakauer, J.W., Hadjiosif, A.M., Xu, J., Wong, A.L., Haith, A.M. (2019) Motor learning. Comprehensive Physiology 9, 613-663."},{"key":"ref10","unstructured":"Kulmala, J.P., Avela, J., Pasanen, K., Parkkari, J. (2013) Forefoot strikers exhibit lower running-induced knee loading than rearfoot strikers. Medicine &#x0026; Science in Sports &#x0026; Exercise 45, 2306-2313."},{"key":"ref11","unstructured":"Baida, S.R., Gore, S.J., Franklyn-Miller, A.D., Moran, K.A. (2018) Does the amount of lower extremity movement variability differ between injured and uninjured populations? A systematic review. Scandinavian Journal of Medicine &#x0026; Science in Sports 28, 1320-1338."},{"key":"ref12","unstructured":"Lieberman, D.E., Venkadesan, M., Werbel, W.A., Daoud, A.I., D'Andrea, S., Davis, I.S., Mang'eni, R.O., Pitsiladis, Y. (2010) Foot strike patterns and collision forces in habitually barefoot versus shod runners. Nature 463, 531-535."},{"key":"ref13","unstructured":"McCamley, J.D., Denton, W., Arnold, A., Raffalt, P.C., Yentes, J.M. (2018) On the calculation of sample entropy using continuous and discrete human gait data. Entropy 20."},{"key":"ref14","unstructured":"Napier, C., Jiang, X., MacLean, C.L., Menon, C., Hunt, M.A. (2020) The use of a single sacral marker method to approximate the centre of mass trajectory during treadmill running. Journal of Biomechanics 108, 109886."},{"key":"ref15","unstructured":"Patoz, A., Lussiana, T., Gindre, C., H&#x00E9;bert-Losier, K. (2019) Recognition of foot strike pattern in Asian recreational runners. Sports 7."},{"key":"ref16","unstructured":"Richman, J.S., Moorman, J.R. (2000) Physiological time-series analysis using approximate entropy and sample entropy. American Journal of Physiology-Heart and Circulatory Physiology 278, H2039-H2049."},{"key":"ref17","unstructured":"Rosenstein, M.T., Collins, J.J., De Luca, C.J. (1993) A practical method for calculating largest Lyapunov exponents from small data sets. Physica D: Nonlinear Phenomena 65, 117-134."},{"key":"ref18","unstructured":"Saini, M., Kerrigan, D.C., Thirunarayan, M.A., Duff-Raffaele, M. (1998) The vertical displacement of the center of mass during walking: a comparison of four measurement methods. Journal of Biomechanical Engineering 120, 133-139."},{"key":"ref19","unstructured":"Seabold, S. and Perktold, J. (2010) Statsmodels: Econometric and statistical modeling with Python. Proceedings of the 9th Python in Science Conference, 92-96."},{"key":"ref20","unstructured":"Stergiou, N., Decker, L.M. (2011) Human movement variability, nonlinear dynamics, and pathology: is there a connection? Human Movement Science 30, 869-888."},{"key":"ref21","unstructured":"Strongman, C., Morrison, A. (2021) Evaluating dynamic similarity of fixed, self-selected and anatomically scaled speeds in non-linear analysis of gait during treadmill running. Human Movement Science 76, 102768."},{"key":"ref22","doi-asserted-by":"crossref","unstructured":"Bonacci, J., Fox, A., Hall, M., Fuller, J.T., Vicenzino, B. (2020) Effect of gait retraining on segment coordination and joint variability in individuals with patellofemoral pain. Clinical Biomechanics 80, 105179.","DOI":"10.1016\/j.clinbiomech.2020.105179"},{"key":"ref23","unstructured":"Valenzuela, K.A., Lynn, S.K., Mikelson, L.R., Noffal, G.J., Judelson, D.A. (2015) Effect of acute alterations in foot strike patterns during running on sagittal plane lower limb kinematics and kinetics. Journal of Sports Science and Medicine 14, 225-232."},{"key":"ref24","unstructured":"Warne, J.P., Kilduff, S.M., Gregan, B.C., Nevill, A.M., Moran, K.A., Warrington, G.D. (2014) A 4-week instructed minimalist running transition and gait-retraining changes plantar pressure and force. Scandinavian Journal of Medicine &#x0026; Science in Sports 24, 964-973."},{"key":"ref25","unstructured":"Williams, D.S., McClay, I.S., Manal, K.T. (2000) Lower extremity mechanics in runners with a converted forefoot strike pattern. Journal of Applied Biomechanics 16, 210-218."},{"key":"ref26","unstructured":"Wood, J.M., Kim, H.E., Morton, S.M. (2024) Reinforcement learning during locomotion. eNeuro 11, ENEURO.0383-23.2024."},{"key":"ref27","unstructured":"Yang, Y., Zhang, X., Luo, Z., Wang, X., Ye, D., Fu, W. (2020) Alterations in running biomechanics after 12 week gait retraining with minimalist shoes. International Journal of Environmental Research and Public Health 17."},{"key":"ref28","unstructured":"Yentes, J.M., Raffalt, P.C. (2021) Entropy analysis in gait research: methodological considerations and recommendations. Annals of Biomedical Engineering 49, 979-990."},{"key":"ref29","unstructured":"Zhang, X., Deng, L., Yang, Y., Xiao, S., Li, L., Fu, W. (2021) Effects of 12-week transition training with minimalist shoes on Achilles tendon loading in habitual rearfoot strike runners. Journal of Biomechanics 128, 110807."},{"key":"ref30","unstructured":"Bovalino, S.P., Kingsley, M.I.C. (2021) Foot strike patterns during overground distance running: A systematic review and meta-analysis. Sports Medicine - Open 7, 82."},{"key":"ref31","unstructured":"Bramble, D.M., Lieberman, D.E. (2004) Endurance running and the evolution of Homo. Nature 432, 345-352."},{"key":"ref32","unstructured":"Buchecker, M., M&#x00FC;ller, E., Wegenkittl, S., Sattlecker, G., St&#x00F6;ggl, T. (2018) An entropy approach for evaluating adaptive motor learning processes while walking with unstable footwear. Human Movement Science 60, 48-56."},{"key":"ref33","unstructured":"Crowley, P., Vuillerme, N., Samani, A., Madeleine, P. (2021) The effects of walking speed and mobile phone use on the walking dynamics of young adults. Scientific Reports 11, 1237."},{"key":"ref34","unstructured":"Deng, L., Dai, B., Zhang, X., Xiao, S., Fu, W. (2024) Effects of gait retraining using minimalist shoes on the medial gastrocnemius muscle-tendon unit behavior and dynamics during running. Scandinavian Journal of Medicine &#x0026; Science in Sports 34, e14630."},{"key":"ref35","unstructured":"Dingwell, J.B., Cusumano, J.P., Cavanagh, P.R., Sternad, D. (2001) Local dynamic stability versus kinematic variability of continuous overground and treadmill walking. Journal of Biomechanical Engineering 123, 27-32."}],"container-title":["Journal of Sports Science and Medicine"],"original-title":[],"language":"en","deposited":{"date-parts":[[2026,8,30]],"date-time":"2026-08-30T13:09:10Z","timestamp":1788095350000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.jssm.org\/jssm-25-822.xml-Fulltext"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,9,1]]},"references-count":36,"URL":"https:\/\/doi.org\/10.52082\/jssm.2026.822","archive":["Internet Archive"],"relation":{},"ISSN":["1303-2968"],"issn-type":[{"value":"1303-2968","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,9,1]]}}}