Effects of running-induced fatigue on plantar pressure distribution in runners with different strike types |
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| Affiliation: | 1. Department of Human Movement Studies, University of Ostrava, Czech Republic;2. Department of Kinesiology and Nutrition Sciences. University of Nevada Las Vegas, USA;1. Research Group in Sports Biomechanics (GIBD), Department of Physical Education and Sports, Universitat de València, St: Gascó Oliag, 3, 46010 Valencia, Spain;2. Research Group in Medical Physics (GIFIME), Department of Physiology, Universitat de València, Ave: Blasco Ibáñez, 15, 46010 Valencia, Spain;3. Department of Physiatry and Nursing, Faculty of Health and Sport Science (FCSD), University of Zaragoza, Ronda Misericordia, 5, 22001 Huesca, Spain;4. Textile Research Institute (AITEX), Sq: Emilio Sala, 1, 03801 Alcoy, Spain;1. Orthopaedics and Traumatology Hospital, University of Basel, Basel, Switzerland;2. Department of Biomedical Engineering, University of Basel, Basel, Switzerland;3. Department of Clinical Research, University of Basel, Basel, Switzerland;4. Medical Fitness Team, Basel, Switzerland;5. Department of Sport Science and Kinesiology, University of Salzburg, Hallein-Rif, Austria;6. Clarahof Clinic of Orthopaedic Surgery, Merian Iselin Hospital Basel, Basel, Switzerland;1. Centre for Human Movement Sciences, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands;2. Center for Sports Medicine, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands;3. Department of Rehabilitation Medicine, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands;4. Department of Epidemiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands |
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| Abstract: | BackgroundRunning induced-fatigue is an important factor in running related injuries. Runners with different strike types have different running mechanics and suffer from different injury patterns. Underlying mechanism of this difference is not well understood.Research questionThe aim of this study was to examine the effects of running-induced fatigue on plantar pressure distribution in runners with different strike types.Methods30 rearfoot (age = 21.56 ± 2.28 years; height = 1.67 ± 0.08 m; mass = 61.43 ± 11.57 kg; BMI = 21.77 ± 2.9 kg∙m−2) and 30 forefoot (age = 19.73 ± 1.68 years; height = 1.71 ± 0.08 m; mass = 65.7 ± 13.45; BMI = 22.53 ± 3.39 kg∙m−2) strike male and female recreational runners were recruited to this study. Participants ran in 3.3 m/s barefoot along the plantar pressure measuring device (Footscan®, Rsscan International) before and after running-induced fatigue. Fatigue protocol was performed on a treadmill. Peak plantar pressure and peak plantar force (% body weight), contact time and medio-lateral force ratio were calculated while running. Repeated measures ANOVA test was used to investigate the effect of running-induced fatigue on plantar pressure variables (p ≤ 0.05).ResultsAfter running-induced fatigue, in the rearfoot strike group, increases in loading of medial and lateral portions of the heel, first metatarsal and big toe was observed, and in lesser toes and in the forefoot push off phase, the medio-lateral force ratio decreased. While, in the forefoot strike group first to third metatarsals loading increased and fifth metatarsal loading decreased after fatigue, and medio-lateral force ratio in the foot flat and forefoot push off phase increased. In both groups contact time increased after fatigue.SignificanceOur data indicate that running-induced fatigue has different effects on plantar pressure distribution pattern in runners with different strike type. These different effects reflect different adaptation strategies in runners with different strike types, and could explain existence of different injury patterns in runners with different strike types. |
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| Keywords: | Running Rearfoot strike Forefoot strike Foot loading Medio-lateral force ratio |
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