Purpose
To examine the test re-test reliability of isometric maximal voluntary contractions (MVC) of hip adduction (ADDISO), hip abduction (ABDISO), and multijoint leg extension (SQUATISO) in recreationally trained female Australian footballers.
Methods
Data were collected from 24 female Australian footballers (age: 22.6 ± 4.5 y; height: 169.4 ± 5.5 cm; body mass: 66.6 ± 8.0 kg; 4.5 ± 4.4 sport-specific training; 2.5 ± 2.0 resistance training years) from the same club on two non-consecutive days. Participants performed 3 isometric MVCs of ADDISO, ABDISO and SQUATISO. The SQUATISO was performed at 140° knee flexion with a vertical trunk position and ADDISO and ABDISO measures were performed in a supine position at 60° of knee flexion and 60° hip flexion. Reliability was assessed using paired T-tests and the intraclass correlation coefficient (ICC) with 95% confidence intervals (CI), typical error (TE) and coefficient of variation (CV%) with 95% CI.
Results
SQUATISO peak force (ICC: .95; CV%: 4.1), ABDISO for left, right and sum (ICC: .90 – .92; CV%: 5.0–5.7), and ADDISO for left right and sum (ICC: .86 − .91; CV%: 6.2–6.9) were deemed acceptably reliable based on predetermined criteria (ICC ≥ .8 and CV% ≤ 10).
Conclusion
SQUATISO, ABDISO and ADDISO tests demonstrated acceptable reliability for the assessment of peak force in recreational female Australian footballers, suggesting these assessments are suitable for muscle strength testing and monitoring adaptations to training.