The effects of a resistance-training program on strength, body composition and baseline hormones in male athletes training concurrently for rugby union 7's

B. T. Crewther, T. Heke, J. W L Keogh

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10 Citations (Scopus)

Abstract

Aim. To examine the effects of a resistance-training program on strength, body composition and baseline hormones in male athletes training concurrently for rugby union 7's. Methods. Participants (N.=12) completed a six-week resistancetraining program focusing on general strength development while still performing additional rugby union 7's training involving agility, speed and cardiovascular fitness. One repetition maximum (IRM) strength was assessed pre and post training across 5 exercises (bench press, back squats, deadlifts, military press and chins), along with body composition and baseline salivary testosterone (T) and Cortisol (C) concentrations. Results. Significant improvements in bench press (11%), back squat (13%), deadlift (13%), military press (10%) and chin-up (6%) IRM strength were observed after training (P ≤0.05). These changes were accompanied by a significant reduction (-1%) in body fat and an increase (1.3%) in fat-free mass. Baseline T and C concentrations and the T/C ratio did not change significantly with training (P≥0.05). Correlational analyses indicated that most of the individual changes in strength, body composition and hormones were not significantly related. Conclusion. The implementation of a resistance-training program in male athletes already training for rugby union 7's led to all-round improvements in maximal dynamic strength even while they continued to perform other forms of rugbyspecific training. These findings support the use of resistance exercise as a supplement to sport-specific training for improving the performance capacity of 7's rugby players.

Original languageEnglish
Pages (from-to)34-41
Number of pages8
JournalJournal of Sports Medicine and Physical Fitness
Volume53
Issue number1
Publication statusPublished - Feb 2013

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Football
Resistance Training
Body Composition
Athletes
Hormones
Education
Chin
Exercise
Sports
Hydrocortisone
Testosterone
Adipose Tissue
Fats

Cite this

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title = "The effects of a resistance-training program on strength, body composition and baseline hormones in male athletes training concurrently for rugby union 7's",
abstract = "Aim. To examine the effects of a resistance-training program on strength, body composition and baseline hormones in male athletes training concurrently for rugby union 7's. Methods. Participants (N.=12) completed a six-week resistancetraining program focusing on general strength development while still performing additional rugby union 7's training involving agility, speed and cardiovascular fitness. One repetition maximum (IRM) strength was assessed pre and post training across 5 exercises (bench press, back squats, deadlifts, military press and chins), along with body composition and baseline salivary testosterone (T) and Cortisol (C) concentrations. Results. Significant improvements in bench press (11{\%}), back squat (13{\%}), deadlift (13{\%}), military press (10{\%}) and chin-up (6{\%}) IRM strength were observed after training (P ≤0.05). These changes were accompanied by a significant reduction (-1{\%}) in body fat and an increase (1.3{\%}) in fat-free mass. Baseline T and C concentrations and the T/C ratio did not change significantly with training (P≥0.05). Correlational analyses indicated that most of the individual changes in strength, body composition and hormones were not significantly related. Conclusion. The implementation of a resistance-training program in male athletes already training for rugby union 7's led to all-round improvements in maximal dynamic strength even while they continued to perform other forms of rugbyspecific training. These findings support the use of resistance exercise as a supplement to sport-specific training for improving the performance capacity of 7's rugby players.",
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The effects of a resistance-training program on strength, body composition and baseline hormones in male athletes training concurrently for rugby union 7's. / Crewther, B. T.; Heke, T.; Keogh, J. W L.

In: Journal of Sports Medicine and Physical Fitness, Vol. 53, No. 1, 02.2013, p. 34-41.

Research output: Contribution to journalArticleResearchpeer-review

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N2 - Aim. To examine the effects of a resistance-training program on strength, body composition and baseline hormones in male athletes training concurrently for rugby union 7's. Methods. Participants (N.=12) completed a six-week resistancetraining program focusing on general strength development while still performing additional rugby union 7's training involving agility, speed and cardiovascular fitness. One repetition maximum (IRM) strength was assessed pre and post training across 5 exercises (bench press, back squats, deadlifts, military press and chins), along with body composition and baseline salivary testosterone (T) and Cortisol (C) concentrations. Results. Significant improvements in bench press (11%), back squat (13%), deadlift (13%), military press (10%) and chin-up (6%) IRM strength were observed after training (P ≤0.05). These changes were accompanied by a significant reduction (-1%) in body fat and an increase (1.3%) in fat-free mass. Baseline T and C concentrations and the T/C ratio did not change significantly with training (P≥0.05). Correlational analyses indicated that most of the individual changes in strength, body composition and hormones were not significantly related. Conclusion. The implementation of a resistance-training program in male athletes already training for rugby union 7's led to all-round improvements in maximal dynamic strength even while they continued to perform other forms of rugbyspecific training. These findings support the use of resistance exercise as a supplement to sport-specific training for improving the performance capacity of 7's rugby players.

AB - Aim. To examine the effects of a resistance-training program on strength, body composition and baseline hormones in male athletes training concurrently for rugby union 7's. Methods. Participants (N.=12) completed a six-week resistancetraining program focusing on general strength development while still performing additional rugby union 7's training involving agility, speed and cardiovascular fitness. One repetition maximum (IRM) strength was assessed pre and post training across 5 exercises (bench press, back squats, deadlifts, military press and chins), along with body composition and baseline salivary testosterone (T) and Cortisol (C) concentrations. Results. Significant improvements in bench press (11%), back squat (13%), deadlift (13%), military press (10%) and chin-up (6%) IRM strength were observed after training (P ≤0.05). These changes were accompanied by a significant reduction (-1%) in body fat and an increase (1.3%) in fat-free mass. Baseline T and C concentrations and the T/C ratio did not change significantly with training (P≥0.05). Correlational analyses indicated that most of the individual changes in strength, body composition and hormones were not significantly related. Conclusion. The implementation of a resistance-training program in male athletes already training for rugby union 7's led to all-round improvements in maximal dynamic strength even while they continued to perform other forms of rugbyspecific training. These findings support the use of resistance exercise as a supplement to sport-specific training for improving the performance capacity of 7's rugby players.

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