Journal
PLOS ONE
Volume 17, Issue 6, Pages -Publisher
PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pone.0269695
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The study investigated the effects of different assessment modalities on the within-limb asymmetry of the same leg. The results showed that the magnitude and direction of within-limb strength imbalances were inconsistent under different resistance load conditions within the same assessment.
The presence of inter-limb asymmetries can influence strength performance and represent an injury risk factor for team sport athletes. The present study aimed to investigate the effects of changes in resistance loads using different assessment modalities on the magnitude and the direction of inter-limb asymmetry within the same leg. Fifteen young elite soccer players from the same professional academy performed rear-foot-elevated-split-squat-test at different loading conditions (body mass with no overload, 25% of body mass, 50% of body mass 50%), isokinetic knee flexor (concentric 30 degrees center dot s(-1), concentric 60 degrees center dot s(-1), eccentric 90 degrees center dot s(-1)) and extensor (concentric 60 degrees center dot s(-1), eccentric 60 degrees center dot s(-1)). The outcomes from the agreement analyses suggested moderate level agreement between body mass vs body mass 25% (Kappa = 0.46), with no agreement or fair agreement for the other between-assessment comparison. Our results demonstrated that the magnitude and direction of within-limb strength imbalances were inconsistent when compared within the same assessment under different resistance load conditions.
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