Next Article in Journal
Neuromuscular Adaptations Following Training and Protein Supplementation in a Group of Trained Weightlifters
Next Article in Special Issue
Portable Force Plates: A Viable and Practical Alternative to Rapidly and Accurately Monitor Elite Sprint Performance
Previous Article in Journal
Analysis of the Relationship between Elite Wrestlers’ Leg Strength and Balance Performance, and Injury History
Open AccessFeature PaperArticle

Is a Bimodal Force-Time Curve Related to Countermovement Jump Performance?

School of Sport, Ulster University, Jordanstown, Shore Road, Newtownabbey, County Antrim BT37 0QB, UK
Ulster Rugby, Kingspan Stadium, Belfast BT6 0FT, UK
Author to whom correspondence should be addressed.
Sports 2018, 6(2), 36;
Received: 12 March 2018 / Revised: 13 April 2018 / Accepted: 16 April 2018 / Published: 18 April 2018
A countermovement jump (CMJ) represents one of the most frequently used performance tests for monitoring neuromuscular function in athletes. An often-overlooked feature that may provide some useful diagnostic information is the actual shape of the force-time curve. The aim of this study was therefore to consider how the shape of the force-time curve influences jump performance. Thirty-three male rugby union players performed two CMJs on a force plate, with discrete variables and continuous curve analysis used. The subjects were dichotomized based on shape of the force-time curve during the propulsion phase and by jump height. The differences between the unimodal and bimodal groups were unclear for jump height (ES = 0.28, ±0.58) and reactive strength index-modified (ES = −0.30, ±0.59). A substantial difference between high (40.2 ± 2.9 cm) and low (31.2 ± 3.2 cm) jumpers only existed in the late propulsion phase by 79.0% to 97.0% of the normalized force-time curve. A bimodal force-time curve is not representative of an optimal pattern of performance and simply reflects an inefficient stretch-shortening cycle. The inter-individual variability that exists in braking COM displacement renders temporal phase analysis impractical in cross-sectional type studies. View Full-Text
Keywords: movement; attention; neuromuscular function; shape movement; attention; neuromuscular function; shape
Show Figures

Figure 1

MDPI and ACS Style

Kennedy, R.A.; Drake, D. Is a Bimodal Force-Time Curve Related to Countermovement Jump Performance? Sports 2018, 6, 36.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map

Back to TopTop