- Title
- HIIT produces increases in muscle power and free testosterone in male masters athletes
- Creator
- Herbert, Peter; Hayes, Lawrence; Sculthorpe, Nicholas; Grace, Fergal
- Date
- 2017
- Type
- Text; Journal article
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/165165
- Identifier
- vital:13227
- Identifier
-
https://doi.org/10.1530/ec-17-0159
- Identifier
- ISBN:2049-3614
- Abstract
- High-intensity interval training (HIIT) improves peak power output (PPO) in sedentary aging men but has not been examined in masters endurance athletes. Therefore, we investigated whether a six-week program of low-volume HIIT would (i) improve PPO in masters athletes and (ii) whether any change in PPO would be associated with steroid hormone perturbations. Seventeen male masters athletes (60 +/- 5 years) completed the intervention, which comprised nine HIIT sessions over six weeks. HIIT sessions involved six 30-s sprints at 40% PPO, interspersed with 3 min active recovery. Absolute PPO (799 +/- 205 W and 865 +/- 211 W) and relative PPO (10.2 +/- 2.0 W/kg and 11.0 +/- 2.2 W/kg) increased from pre- to post-HIIT respectively (P < 0.001, Cohen's d = 0.32-0.38). No significant change was observed for total testosterone (15.2 +/- 4.2 nmol/L to 16.4 +/- 3.3 nmol/L (P = 0.061, Cohen's d = 0.32)), while a small increase in free testosterone occurred following HIIT (7.0 +/- 1.2 ng/dL to 7.5 +/- 1.1 ng/dL pre-to post-HIIT (P = 0.050, Cohen's d = 0.40)). Six weeks' HIIT improves PPO in masters athletes and increases free testosterone. Taken together, these data indicate there is a place for carefully timed HIIT epochs in regimes of masters athletes.
- Publisher
- BioScientifica Ltd
- Relation
- Endocrine Connections Vol. 6, no. 7 (2017), p. 430-436
- Rights
- https://creativecommons.org/licenses/by-nc/4.0/
- Rights
- Copyright © 2017 The authors. Published by Bioscientifica Ltd
- Rights
- Open Access
- Rights
- This metadata is freely available under a CCO license
- Subject
- Cortisol; HIIT; Power; Steroid; Testosterone
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