Force-Time Analysis of the Drop Jump: Reliability of Jump Measures and Calculation Methods for Measuring Jump Height

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14

Measurement Techniques; Psychomotor Skills; Test Reliability; Computation; Exercise; Young Adults; College Students; Student Athletes; Foreign Countries

10.1080/1091367X.2023.2257169

1091-367X
1532-7841

The purpose was to evaluate reliability of measurements during drop jump (DJ) and magnitude of differences in vertical jump height (VJH) when calculated using two variables: time-in-the-air and center-of-mass velocity. Thirty-seven handball players performed three single-leg and double-leg DJs on a portable force plate during two sessions. Sixteen outcome measures and four sets of reliability metrics, including intraclass correlation coefficients (ICCs), were estimated. All outcome measures, except vertical time-to-stabilization, yielded high (0.70-0.89) to very high (0.90-0.96) interday and intraday ICCs for the single-leg and double-leg DJ tests. These results indicated that the single-leg and double-leg DJ tests can be considered reliable for short-term and long-term monitoring of collegiate handball players of both sexes. In addition, the single-leg DJ VJH calculated using these two variables differed in magnitude (mean difference in test measurements: 0.64 cm, p < 0.001, effect size: 0.165). Therefore, we recommend using the same method to calculate single-leg VJH for long-term monitoring.

As Provided

2024

EJ1420297