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Running after cycling induces inter-limb differences in muscle activation but not in kinetics or kinematics

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journal contribution
posted on 14.05.2021, 04:50 by Tiago Jacques, Rodrigo Rico-BiniRodrigo Rico-Bini, Anton Arndt
Overuse injuries are a common problem to triathletes’ population. Overuse injuries may arise from inter-limb biomechanical differences during running, but the literature lacks information regarding inter-limb differences in triathletes. In this study inter-limb differences were investigated in injury-free triathletes during the running portion of a simulated cycle-run transition. Thirteen triathletes performed a 5 km run preceded by a 20 min cycling trial at 70% of maximal power output. During the Start, Mid and End stages of running, kinetic, kinematic and muscle activation variables were compared between the preferred and non-preferred limbs across the stance phase. A statistical parametric mapping analysis showed no differences between limbs when considering kinetic and kinematic variables (p > 0.05, ES<0.60). A lower soleus activation was observed in the preferred limb (p < 0.05, ES>0.60) from 53.40–75.9% of the stance phase at the End stage of running. In conclusion, inter-limb differences in kinetic or kinematic variables may not represent a risk for overloading in triathletes. However, inter-limb differences in triceps surae activation during running after cycling may represent one potential factor leading to overuse injuries in triathletes and should be further investigated.

Funding

This work was supported by the Centrum for Idrottsforskning (CIF Sweden) and Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ Brazil).

History

Publication Date

15/01/2021

Journal

Journal of Sports Sciences

Volume

39

Issue

2

Pagination

7p. (p. 154-160)

Publisher

Taylor and Francis

ISSN

0264-0414

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