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Force-Velocity-Power Assessment in Semiprofessional Rugby Union Players

McMaster, Daniel T.; Gill, Nicholas D.; Cronin, John B.; McGuigan, Michael R.

Journal of Strength & Conditioning Research: April 2016 - Volume 30 - Issue 4 - p 1118–1126
doi: 10.1519/JSC.0b013e3182a1da46
Original Research

Abstract: McMaster, DT, Gill, N, Cronin, J, and McGuigan, M. Force-velocity-power assessment in semiprofessional rugby union players. J Strength Cond Res 30(4): 1118–1126, 2016—There is a constant and necessary evolution of training and assessment methods in the elite contact sports; as is required to continually improve the physical qualities of these respective athletes to match the growing sport and position-specific performance demands. Our aim was to examine the differences between ballistic upper body performance profiles and maximum upper body strength of elite rugby union forwards and backs. Twenty semiprofessional male rugby union players (age = 21.1 ± 3.0 years; mass = 94.9 ± 9.7 kg) were assessed for maximum bench press strength (1RM bench press = 121.3 ± 21.8 kg) and maximum throw power (Pmax), force (Fmax), and velocity (V[Combining Dot Above]max) from an incremental relative load testing protocol (15, 30, 45, 60, and 75% 1RM). Player rankings were also included to identify individual strength and weaknesses. The forwards were moderately stronger (effect size [ES] = 0.96; p = 0.01), produced significantly greater Fmax (ES = 1.17–1.41; p = 0.01) and were more powerful (ES = 0.57–0.64; p < 0.43) than the backs. V[Combining Dot Above]max differences were trivial to small (ES = −0.32 to −0.65; p > 0.15). There were inherent differences in strength and Fmax between the forwards and backs most likely because of the physical demands of these respective positions. Improvements in upper body strength may in turn improve ballistic force and power production, but not necessarily velocity capabilities. From the Fmax and V[Combining Dot Above]max observations, the forwards seem to be more force dominant and the backs more velocity dominant. Pmax, Fmax, and V[Combining Dot Above]max may be used to highlight proficient and deficient areas in ballistic upper body performance; the individual rankings could be further used to identify and possibly rectify individual deficiencies.

1Auckland University of Technology, North Shore City, New Zealand;

2New Zealand Rugby Union, Wellington, New Zealand; and

3Biomedical and Health Sciences, School of Exercise, Edith Cowan University, Perth, Australia

Address correspondence to Daniel T. McMaster, tmcmaste@aut.ac.nz.

Copyright © 2016 by the National Strength & Conditioning Association.