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- Title
Magnitude and time course of changes in maximal oxygen uptake in response to distinct regimens of chronic interval training in sedentary women.
- Authors
Astorino, Todd; Schubert, Matthew; Palumbo, Elyse; Stirling, Douglas; McMillan, David; Cooper, Christina; Godinez, Jackie; Martinez, Donovan; Gallant, Rachael
- Abstract
Purpose: This study aimed to compare changes in maximal oxygen uptake ( VO) in response to two regimens of chronic interval training. Methods: Twenty healthy sedentary women (mean ± SD age and VO = 23.0 ± 5.7 years and 30.1 ± 4.4 mL kg min, respectively) were randomized to complete 12 weeks of one of two interval training regimes, while an additional seven women served as controls. Training was performed 3 days week on a cycle ergometer and consisted of 6-10 bouts of 1 min duration at lower (60-80 % W = LO, n = 10) or more intense (80-90 % W = HI, n = 10) workloads separated by a brief recovery. Every 3 weeks, measures of VO and W were repeated to assign new training intensities. Changes in blood pressure and body composition were also examined. Results: Data revealed significant ( p < 0.001) improvements in VO in LO (22.3 ± 6.9 %) and HI (21.9 ± 11.6 %) that were similar ( p > 0.05) between groups. Approximately 60 % of the increase in VO in HI was observed in the initial 3 weeks, compared to only 20 % in LO. No change ( p > 0.05) in body weight or body composition was revealed in response to training. Results demonstrate that a relatively prolonged regimen of moderate or more intense interval training induces similar improvements in cardiorespiratory fitness, although HI induced greater increases in VO early on in training than LO. Completion of more intense interval training may be an effective means to expedite increases in VOmax soon after initiation of exercise training.
- Subjects
AEROBIC capacity; WEIGHT training; INTERVAL training; BLOOD pressure; SEDENTARY women
- Publication
European Journal of Applied Physiology, 2013, Vol 113, Issue 9, p2361
- ISSN
1439-6319
- Publication type
Article
- DOI
10.1007/s00421-013-2672-1