Quantifying neuromuscular fatigue induced by an intense training session in rugby sevens
(Quantifizierung der neuromuskulären Ermüdung nach einer intensiven Trainingseinheit im Rugby 7s)
Purpose:
To compare the sensitivity of a sprint vs a countermovement-jump (CMJ) test after an intense training session in international rugby sevens players, as well as analyze the effects of fatigue on sprint acceleration.
Methods:
Thirteen international rugby sevens players completed two 30-m sprints and a set of 4 repetitions of CMJ before and after a highly demanding rugby sevens training session.
Results:
Change in CMJ height was unclear (-3.6%; ±90% confidence limits 11.9%. Chances of a true positive/trivial/negative change: 24/10/66%), while a very likely small increase in 30-m sprint time was observed (1.0%; ±0.7%, 96/3/1%). A very likely small decrease in the maximum horizontal theoretical velocity (V0) (-2.4; ±1.8%, 1/4/95%) was observed. A very large correlation (r = -.79 ± .23) between the variations of V0 and 30-m-sprint performance was also observed. Changes in 30-m sprint time were negatively and very largely correlated with the distance covered above the maximal aerobic speed (r = -.71 ± .32).
Conclusions:
The CMJ test appears to be less sensitive than the sprint test, which casts doubts on the usefulness of a vertical-jump test in sports such as rugby that mainly involve horizontal motions. The decline in sprint performance relates more to a decrease in velocity than in force capability and is correlated with the distance covered at high intensity.
© Copyright 2017 International Journal of Sports Physiology and Performance. Alle Rechte vorbehalten.
Schlagworte: | Training Rugby Belastungsintensität Ermüdung Neurophysiologie Test |
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Notationen: | Spielsportarten |
DOI: | 10.1123/ijspp.2016-0030 |
Veröffentlicht in: | International Journal of Sports Physiology and Performance |
Veröffentlicht: |
2017
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Jahrgang: | 12 |
Heft: | 2 |
Seiten: | 218-223 |
Dokumentenarten: | Artikel |
Sprache: | Englisch |
Level: | hoch |