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European Journal of Applied Physiology

, Volume 113, Issue 9, pp 2361–2369 | Cite as

Magnitude and time course of changes in maximal oxygen uptake in response to distinct regimens of chronic interval training in sedentary women

  • Todd A. AstorinoEmail author
  • Matthew M. Schubert
  • Elyse Palumbo
  • Douglas Stirling
  • David W. McMillan
  • Christina Cooper
  • Jackie Godinez
  • Donovan Martinez
  • Rachael Gallant
Original Article

Abstract

Purpose

This study aimed to compare changes in maximal oxygen uptake (VO2max) in response to two regimens of chronic interval training.

Methods

Twenty healthy sedentary women (mean ± SD age and VO2max = 23.0 ± 5.7 years and 30.1 ± 4.4 mL kg−1 min−1, 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−1 on a cycle ergometer and consisted of 6–10 bouts of 1 min duration at lower (60–80 % W max = LO, n = 10) or more intense (80–90 % W max = HI, n = 10) workloads separated by a brief recovery. Every 3 weeks, measures of VO2max and W max 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 VO2max 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 VO2max 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 VO2max early on in training than LO. Completion of more intense interval training may be an effective means to expedite increases in VO2max soon after initiation of exercise training.

Keywords

VO2max Exercise training Women Body fat Interval exercise 

Abbreviations

BMI

Body mass index

%BF

Percent body fat

d

Day

HI

Higher intensity interval training

HR

Heart rate

kg

Kilogram

LO

Lower intensity interval training

mL

Milliliter

Min

Minute

s

Second

VO2max

Maximal oxygen uptake

W

Workload

WC

Waist circumference

wk

Week

yr

Years

Notes

Acknowledgments

This study was partially funded by a University GPSM grant. The authors want to thank the subjects for their sincere dedication to the project as well as Kalie Reams and Weston Titus for assistance with data collection.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Todd A. Astorino
    • 1
    Email author
  • Matthew M. Schubert
    • 1
    • 2
  • Elyse Palumbo
    • 1
  • Douglas Stirling
    • 1
  • David W. McMillan
    • 1
  • Christina Cooper
    • 1
  • Jackie Godinez
    • 1
  • Donovan Martinez
    • 1
  • Rachael Gallant
    • 1
  1. 1.Department of KinesiologyCalifornia State UniversitySan MarcosUSA
  2. 2.School of Public HealthGriffith UniversityGold CoastAustralia

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