Physical and physiological differences of backs and forwards from the Brazilian National rugby union team
(Physische und physiologische Unterschiede zwischen Backwards und Forwards in der brasilianischen 15-er Rugbynationalmannschaft )
BACKGROUND:
The aim of this study was to compare backs and forwards rugby union players recruited to a National team in the following physical and physiological indicators: anthropometrics, squat jump (SJ), countermovement jump (CMJ), 10- and 30-meter sprint, resting heart rate variability (HRV), Yo-Yo Test and heart rate (HR) at 2 minutes of test.
METHODS:
The measurements were performed on the first day of a training camp planned to finely select the players who would participate in the 2016 America's Rugby Championship. The magnitude-based inference was used in the comparisons.
RESULTS:
Backs demonstrated almost certainly greater distance in the Yo-Yo Test (backs: 2305.9±231.3 meters; forwards: 1802.4±361.2 meters), higher vertical jump height in both SJ and CMJ (SJ: 44.0±5.3 cm vs. 37.6±5.4 cm; CMJ: 46.1±5.0 cm vs. 40.0±5.5 cm, for backs and forwards respectively), and superior sprint velocity in 10- and 30-m (10-m: 6.02±0.23 m.s-1 vs. 5.51±0.34 m/s; 30-m: 7.46±0.25 m/s vs. 6.89±0.37 m/s, for backs and forwards respectively) than the forwards. In contrast, forwards were almost certainly taller and heavier than backs, and displayed higher sprint momentum in 10- and 30-meters (10 meters: 513.0±51.6 kg.m.s-1 vs. 598.4±53.1 kg/m.s; 30 meters: 635.3±56.1 kg/m.s vs. 749.0±70.5 kg/m.s, for backs and forwards respectively). The submaximal HR in the first 2-minutes of the Yo-Yo test was likely lower in the backs than in the forwards (77.6±5.1% of the maximal HR vs. 81.3±5.4% of the maximal HR for backs and forwards respectively), while HRV indices were not different between backs and forwards.
CONCLUSIONS:
Playing position appears to be determined by the players' physical and physiological characteristics in top-level rugby union, and the submaximal HR measured during Yo-Yo test can be a simple alternative to discriminate backs and forwards.
© Copyright 2017 The Journal of Sports Medicine and Physical Fitness. Edizioni Minerva Medica. Alle Rechte vorbehalten.
Schlagworte: | Körperbau Anthropometrie Sportpsychologie Rugby Brasilien |
---|---|
Notationen: | Spielsportarten Biowissenschaften und Sportmedizin |
DOI: | 10.23736/S0022-4707.16.06751-7 |
Veröffentlicht in: | The Journal of Sports Medicine and Physical Fitness |
Veröffentlicht: |
2017
|
Jahrgang: | 57 |
Heft: | 12 |
Seiten: | 1549-1556 |
Dokumentenarten: | Artikel |
Sprache: | Englisch Russisch |
Level: | hoch |