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JOURNAL
OF
SPORTS SCIENCE &
MEDICINE
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Research
article
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THE EFFECTS OF INTERMITTENT EXERCISE ON PHYSIOLOGICAL OUTCOMES IN AN OBESE POPULATION: CONTINUOUS VERSUS INTERVAL WALKING |
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Leanne Campbell1, Karen Wallman1 
and Danny Green1,2 |
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1School of Sport Science, Exercise and Health, the University of Western Australia 2Research Institute for Sport and Exercise Science, Liverpool John Moores University. |
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© Journal of Sports Science and Medicine (2010) 9, 24 - 30 |
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| ABSTRACT | |||
| This study compared the effects of 12 weeks of caloric restriction
and interval exercise (INT) and caloric restriction and continuous aerobic
exercise (CON) on physiological outcomes in an obese population. Forty-four
individuals (BMI > 30 kg·m-2) were randomised into the INT or CON group.
Participant withdrawal resulted in 12 and 14 participants in the INT and
CON groups, respectively. All participants were on a strict monitored diet.
Exercise involved two 15-min bouts of walking performed on five days per
week. Interval exercise consisted of a 2:1 min ratio of low-intensity (40-45%
VO2peak) and high- intensity (70-75% VO2peak) exercise,
while the CON group exercised between 50-55% VO2peak. Exercise
duration and average intensity (%VO2peak) were similar between
groups. There were no significant differences (p > 0.05) between the
two groups for any variable assessed apart from very low density lipoprotein
(VLDL-C), which significantly decreased over time in the INT group only
(p < 0.05, d = 1.03). Caloric restriction and interval exercise compared
to caloric restriction and continuous aerobic exercise resulted in similar
outcome measures apart from VLDL-C levels, which significantly improved
in the INT group only. Key words: Interval training, body fat, fitness, metabolism. |
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