Effects of the foot strike pattern on muscle activity and neuromuscular fatigue in downhill trail running

Minimizing musculo‐skeletal damage and fatigue is considered paramount for performance in trail running. Our purposes were to investigate the effects of the foot strike pattern and its variability on (a) muscle activity during a downhill trail run and (b) immediate and delayed neuromuscular fatigue....

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Bibliographic Details
Published in:Scandinavian journal of medicine & science in sports 2017-08, Vol.27 (8), p.809-819
Main Authors: Giandolini, M., Horvais, N., Rossi, J., Millet, G. Y., Morin, J.‐B., Samozino, P.
Format: Article
Language:English
Subjects:
Acceleration
Adult
Biomechanical Phenomena
Downhill running
Electromyography
Fatigue
Foot - physiology
foot strike
Gait
Heel
Humans
Knee
Life Sciences
Linear Models
Male
Metatarsal Bones
muscle activity
Muscle Fatigue - physiology
Muscle function
Muscle, Skeletal - physiology
neuromuscular fatigue
Pain
Running
Running - physiology
Sports medicine
Sports training
Torque
trail running
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Summary:Minimizing musculo‐skeletal damage and fatigue is considered paramount for performance in trail running. Our purposes were to investigate the effects of the foot strike pattern and its variability on (a) muscle activity during a downhill trail run and (b) immediate and delayed neuromuscular fatigue. Twenty‐three runners performed a 6.5‐km run (1264 m of negative elevation change). Electromyographic activity of lower‐limb muscles was recorded continuously. Heel and metatarsal accelerations were recorded to identify the running technique. Peripheral and central fatigue was assessed in knee extensors (KE) and plantar flexors (PF) at Pre‐, Post‐, and 2 days post downhill run (Post2d). Anterior patterns were associated with (a) higher gastrocnemius lateralis activity and lower tibialis anterior and vastus lateralis activity during the run and (b) larger decreases in KE high‐frequency stimulus‐evoked torque Post and larger decrements in KE MVC Post2d. High patterns variability during the run was associated with (a) smaller decreases in KE Db100 Post and MVC Post2d and (b) smaller decreases in PF MVC Post and Post2d. Anterior patterns increase the severity of KE peripheral fatigue. However, high foot strike pattern variability during the run reduced acute and delayed neuromuscular fatigue in KE and PF.
ISSN:0905-7188
1600-0838
DOI:10.1111/sms.12692