H. Forbes1, A. Bullers1, A. Lovell1, L. R. McNaughton1, R. C. Polman2, J. C. Siegler1 | |
1Department of Sport, Health and Exercise Science, University of Hull, Hull, United Kingdom 2Centre for Applied Sport and Exercise Sciences, University of Central Lancashire, Preston, United Kingdom |
Forbes, H., Bullers, A., Lovell, A., McNaughton, L. R.,Polman,
R. C. & Siegler, J. C. (2009). Relative torque profiles of
elite male youth footballers: Effects of age and pubertal
development (Relative Drehmomentsprofile junger
Nachwuchsprofis im Fußball: Effekte von Alter und puberaler
Entwicklung). Int. J. Sports Med., 30 (8), 592-597. Zugriff am
11.08.2009 unter
http://www.thieme-connect.de/ejournals/abstract/sportsmed/doi/10.1055/s-0029-1202817
This study aimed to establish the effect of age and pubertal
development on relative peak torque in youth footballers. One
hundred and fifty-seven subjects were arranged into U12-U18 age
groups; of these 133 also completed a self-reporting measure of
pubertal development (PDS) and were grouped accordingly. Bilateral
isokinetic testing included mean peak torque/body weight (PT/BW)
and angle of peak torque (AoPT) for reps 2-4 of 5 in concentric
quadriceps (CQ), concentric hamstrings (CH) and eccentric
hamstrings (EH) at 60°s-1. Two minutes rest were provided between
concentric and eccentric tests for both legs. A significant
increase with age was noted for PT/BW in CQ, CH and EH (P<0.05),
although post hoc analyses revealed different patterns of
significance dependent upon muscle and type of contraction.
Specifically, the U18 s (CQ:2.20 nm/kg, CH:1.39 nm/kg, EH:2.16
nm/kg) were not significantly stronger than the U16 s and U15 s
(CQ:2.42/2.29 nm/kg, CH:1.41/1.27 nm/kg, EH:2.22/2.15 nm/kg) even
though they had entered full time training. The relationship
between EH PT/BW and AoPT showed a weak but significant inverse
correlation (P<0.001; R=-0.390 and -0.346 for dominant and non
dominant legs). The findings of this study present unique football
specific normative and age/PDS group data for PT/BW and AoPT, and
the corresponding relationship between these variables.
(Mikrofiche-Nummer: 17318)
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