Evaluation of Trunk Muscle Strength and Endurance: A Comparison of Women With and Without Chronic Ankle Instability

Objective: The purpose of this study was to compare the strength and endurance of the trunk muscles in women with chronic ankle instability (CAI) compared with those who do not have CAI.

Methods: Sixty-two women were assigned into 2 equal groups of 31; group A included women with CAI and group B included healthy women. Peak torques per body weight of the trunk extensors and flexors were measured using a Biodex System 3 Isokinetic Dynamometer. McGill core endurance tests (prone bridge, right side bridge, left side bridge, trunk flexion, and horizontal back extension) were administered to assess trunk muscle endurance. Statistical analysis using 1-way between-subjects multivariate analysis of variance was performed.

Results: No significant differences in peak torques per body weight strength ratios of trunk extensors and flexors between the 2 tested groups (P > .05) were found. Similarly, no significant difference was found in the trunk muscle endurance between the 2 tested groups (P > .05).

Conclusion: No statistically significant differences were observed in the strength and endurance of the trunk muscle between women with CAI and healthy women.