Force-Time Analysis of the Drop Jump: Reliability of Jump Measures and Calculation Methods for Measuring Jump Height
Measurement in Physical Education and Exercise Science, vol.28, no.2, pp.119-132, 2024 (SCI-Expanded, SSCI, Scopus)
- Publication Type: Article / Article
- Volume: 28 Issue: 2
- Publication Date: 2024
- Doi Number: 10.1080/1091367x.2023.2257169
- Journal Name: Measurement in Physical Education and Exercise Science
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Social Sciences Citation Index (SSCI), Scopus, Academic Search Premier, CAB Abstracts, CINAHL, Educational research abstracts (ERA), ERIC (Education Resources Information Center), Psycinfo, SportDiscus
- Page Numbers: pp.119-132
- Keywords: athlete monitoring, handball, single and double leg drop jump, vertical jump height, vertical jump test
- Hacettepe University Affiliated: Yes
Abstract
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 <.001, effect size: 0.165). Therefore, we recommend using the same method to calculate single-leg VJH for long-term monitoring.