How Many Familiarization Sessions Does the Isometric Squat Test Require for Stable Results.

Area of Science:

• Sports Science
• Biomechanics
• Strength and Conditioning

Background:

• Isometric strength testing is crucial for assessing athlete performance.
• The isometric squat test (ISQT) is a safe and efficient method for evaluating force production.
• Current literature lacks consensus on the optimal number of familiarization sessions for ISQT.

Purpose of the Study:

• To determine the number of familiarization sessions needed for stable ISQT performance.
• To investigate the influence of familiarization on ISQT reliability.
• To establish standardized protocols for isometric strength testing.

Main Methods:

• Fifteen male athletes participated in 4 testing days with at least 24 hours between sessions.
• Each session included 3 maximal isometric squat tests (ISQTs).
• Peak force data were analyzed using a generalized linear mixed model and ICC calculations.

Main Results:

• Significant effects of sessions and trials on ISQT performance were observed (p < 0.05).
• Intraclass correlation coefficients (ICC) increased over sessions, indicating reduced variability (ICC = 0.905 for sessions 1-4; 0.949 for sessions 3-4).
• Progressive reduction in performance variability was noted over time.

Conclusions:

• A minimum of 3 familiarization sessions, with 3 trials per session, is recommended for reliable ISQT outcomes.
• Adequate familiarization is essential for mitigating within-subject variability in isometric strength testing.
• This study aids in standardizing ISQT protocols for accurate athlete assessment.