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Side-to-Side Asymmetry of Single-Leg Repeated Deceleration-Acceleration Performance is Related to Deterioration of Running Change-of-Direction Performance in Amateur Adult Female Netball Players

Clark, Nicholas and Mullally, Elaine (2021) Side-to-Side Asymmetry of Single-Leg Repeated Deceleration-Acceleration Performance is Related to Deterioration of Running Change-of-Direction Performance in Amateur Adult Female Netball Players. In: Women in Sport and Exercise (WISE) Annual Conference, 2021-04-19 - 2021-04-22, University of Worcester.

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Abstract

Background Side-to-side asymmetry of single-leg motor-performance is hypothetically linked to deterioration of running change-of-direction (CoD) performance in games-players. Currently, asymmetry research biases single-leg motor-performance in elite male and female athletes. Asymmetry issues that influence performance and have implications for practice have not been examined for amateur adult female games-players. Aim To determine the relationships between triple-hop-for-distance (THD) absolute-asymmetry (THD-AA) and Illinois-agility-test (IAT) performance, and single-hop-for-distance (SHD) absolute-asymmetry (SHD-AA) and IAT performance, in amateur adult female netball players. Methods Twenty-three players participated (mean±SD: age 28.7±6.2yr; height 171.6±7.0cm; mass 68.2±9.8kg). Test order was THD (cm), SHD (cm), IAT (s). For THD and SHD, leg order was right, left. Practice trials preceded three measured trials. For THD and SHD, trial means were used to compute a limb-symmetry-index (LSI; %): (right ÷ left) × 100. Absolute-asymmetry (%) was calculated: 100 − LSI. Negative signs were removed. Normality of data was tested (Shapiro-Wilk). Spearman’s correlation (rs) assessed relationships. Coefficient of determination (rs2) assessed the proportion (%) of variance shared between variables. Alpha was set a priori (0.05). Results Data were (median, range): THD-AA 3.3%, 0.2-15.8%; SHD-AA 2.4%, 0.0-17.3%; IAT 19.6s, 17.8-22.9s. Relationships were: THD-AA/IAT, rs=0.54, rs2=0.29, p=0.01; SHD-AA/IAT, rs=0.31, rs2=0.10, p=0.07. Conclusion As THD-AA increased, IAT performance deteriorated. Approaching one-third (29%) of the variance in IAT performance was explained by THD-AA. Therefore, to enhance repetitive running CoD performance in amateur adult female netball players, training efforts may need to consider mitigating right-left asymmetries in sagittal plane single-leg repeated deceleration-acceleration performance as represented by the THD.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Additional Information: Published proceedings: _not provided_
Uncontrolled Keywords: Knee, Asymmetry, Netball, Hop test, Change of direction
Divisions: Faculty of Science and Health > Sport, Rehabilitation and Exercise Sciences, School of
Depositing User: Elements
Date Deposited: 09 Jun 2021 15:05
Last Modified: 09 Jun 2021 16:15
URI: http://repository.essex.ac.uk/id/eprint/30350

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