Between Session Reliability of Traditional and Temporal Bilateral and Unilateral Dynamic Strength Index Calculations and Association With Sprint and Change of Direction Performance
Analysis shows variable reliability of dynamic strength index methods in 38 male participants, indicating implications for sprint and change of direction performance.
Key Points
Reliability of dynamic strength index was assessed using interclass correlation coefficients, averaging 0.24 to 0.76 across measures.
Bayesian analysis revealed that bilateral DSI had greater reliability compared to unilateral measures, with significant variability based on limb dominance.
K-means clustering identified that DSI 100 for the dominant side correlated best with sprint performance outcomes, specifically with R² values of 0.33 to 0.36.
Findings suggest cautious application of dynamic strength index for exercise prescription targeting rapid directional changes, highlighting limitations in reliability measures.