Running mechanics and leg muscle activity patterns during early and late acceleration phases of repeated treadmill sprin
- PDF / 1,571,478 Bytes
- 12 Pages / 595.276 x 790.866 pts Page_size
- 57 Downloads / 159 Views
ORIGINAL ARTICLE
Running mechanics and leg muscle activity patterns during early and late acceleration phases of repeated treadmill sprints in male recreational athletes Olivier Girard1,2 · Franck Brocherie3 · Jean‑Benoit Morin4,5 · Grégoire P. Millet6 · Clint Hansen7 Received: 22 January 2020 / Accepted: 10 September 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Purpose We determined whether running mechanics and leg muscle activity patterns for pre-activation (50 ms prior to foot contact) and loading (first half, second half and entire stance) phases vary between early, late and entire acceleration phases during repeated treadmill sprints. Methods Ten male athletes performed three sets of five 5-s sprint accelerations (25-s and 3-min recovery between sprints and sets, respectively) on an instrumented treadmill. Ground reaction forces and surface EMG data (root mean square values of vastus lateralis, rectus femoris, biceps femoris, gastrocnemius medialis, gastrocnemius lateralis and tibialis anterior muscles of the right leg) corresponding to early, late and entire acceleration (steps 2, 4 and 6; steps 8, 10 and 12; and all steps, respectively) have been compared. Results Independently of fatigue, vertical and horizontal forces, contact time, step length, and step frequency differed as running velocity increased over different sprint acceleration sections (all P
Data Loading...
