The Ecological Validity of Countermovement Jump to On-Court Asymmetry
in Basketball
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abstract
AbstractJump-based asymmetry is often used as an indicator of sport performance and may
be used to discern injury susceptibility. Due to task specificity, however,
countermovement jump asymmetry may not be representative of on-court asymmetry.
As such, we assessed the association between countermovement jump asymmetry and
on-court impact asymmetry metrics (n=3, and n=4, respectively)
using linear regressions (α=0.05). Fifteen female basketball
athletes completed countermovement jump and on-court sessions across a
competitive season. A significant negative association was found between peak
landing force asymmetry and both overall and medium acceleration on-court
asymmetry (b=–0.1, R2=0.08, p<0.001;
b=–0.1, R2 =0.11, p<0.001,
respectively), as well as between peak propulsive force asymmetry and on-court
medium acceleration asymmetry (b=–0.24,
R2=0.04, p=0.01). Alternatively, both peak landing
and peak propulsive force asymmetry were significantly positively associated
with on-court high acceleration asymmetry (b=0.17,
R2 =0.08, p<0.001; b=0.35,
R2=0.02, p=0.04, respectively). While some
overlap may exist, countermovement jump and on-court impact asymmetry appear to
be independent. Thus, sport-specific monitoring may be necessary to adequately
monitor injury susceptibility using asymmetry.
