Divergent isokinetic muscle strength deficits in street running athletes

Grazioli, Rafael, Sobieski, Nataniel, Wilhelm, Eurico N., Brusco, Clarissa Muller and Rech, Anderson (2022) Divergent isokinetic muscle strength deficits in street running athletes. Sport Sciences for Health, 18 (3). pp. 781-788. ISSN 1824-7490

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Official URL: https://doi.org/10.1007/s11332-021-00856-2


Background: Running is a very popular activity and muscle strength imbalance has been treated with caution to prevent injuries. Aim: The present study aimed to compare and correlate knee flexion and extension strength imbalance based on peak torque (PT) and total work (TW) in running athletes. Methods: Thirty-eight male amateur running athletes (38 ± 6 years; 80.6 ± 8.3 kg; 177 ± 7 cm; 7.8 ± 8.4 years of training; 3.5 ± 0.9 training sessions a week; 33.5 ± 13.4 km of training per week) took part in the present study. Knee flexion eccentric and concentric PT and TW, as well as concentric knee extension PT and TW were assessed. PT- and TW-based hamstring-to-quadriceps ratios (H:Q), as well as PT and TW contralateral imbalance were quantified. Results: A significant correlation was observed between TW and PT concentric knee flexion contralateral deficits (r = 0.52, p < 0.001). No further correlations were found among TW- and PT-based muscle strength imbalance variables (p > 0.05). All mean comparisons of H:Q and contralateral imbalances using TW or PT were significantly different (p < 0.05). Conclusions: Our results showed that TW and PT muscle strength imbalance were unrelated, and the H:Q and contralateral imbalance profile of endurance runners may differ based on the isokinetic variable analyzed.

Item Type: Article
Additional Information: Funding information: We thank to CAPES and CNPq Brazilian Government Associations for support. We also thank to Universidade de Caxias do Sul and all the running athletes who participated in this research and made it possible.
Uncontrolled Keywords: Running, Muscle imbalance, Hamstring-to-quadriceps ratios, Isokinetic dynamometry
Subjects: C600 Sports Science
Department: Faculties > Health and Life Sciences > Sport, Exercise and Rehabilitation
Depositing User: Elena Carlaw
Date Deposited: 11 Nov 2021 14:28
Last Modified: 22 Oct 2022 03:30
URI: https://nrl.northumbria.ac.uk/id/eprint/47707

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