Concurrent Training in Rugby Sevens: Effects of High-Intensity Interval Exercises.
OBJECTIVE
To assess the impact of 2 high-intensity interval-training (HIT) programs (short interval vs sprint interval training) on muscle strength and aerobic performances in a concurrent training program in amateur rugby sevens players.


METHODS
Thirty-six amateur rugby sevens players were randomly assigned to strength and short interval training (INT), strength and sprint interval training (SIT), or a strength-only training group (CON) during an 8-wk period. Maximal strength and power tests, aerobic measurements (peak oxygen uptake [VO2peak] and maximal aerobic velocity), and a specific repeated-sprint ability (RSA) test were conducted before and immediately after the overall training period.


RESULTS
From magnitude-based inference and effect size (ES ± 90% confidence limit) analyses, the current study revealed substantial gains in maximal strength and jump-height performance in all groups. The difference in change of slow concentric torque production was greater in CON than in SIT (0.65 ± 0.72, moderate). VO2peak and, consequently, mean performance in the RSA test were improved in the SIT group only (0.64 ± 0.29, moderate; -0.54 ± 0.35, moderate).


CONCLUSIONS
The study did not emphasize interference on strength development after INT but showed a slight impairment of slow concentric torque production gains after SIT. Compared with INT, SIT would appear to be more effective to develop VO2peak and RSA but could induce lower muscle-strength gains, especially at low velocity.
Julien
J
Robineau
Mathieu
M
Lacome
Julien
J
Piscione
Xavier
X
Bigard
Nicolas
N
Babault
D000328:Adult; D054874:Athletic Performance / Q000502:physiology*; D005538:Football / Q000502:physiology*; D000072696:High-Intensity Interval Training; D006801:Humans; D053580:Muscle Strength / Q000502:physiology*; D010101:Oxygen Consumption; D059385:Plyometric Exercise
aerobic training; interference; strength training