Previous investigations have shown that metabolic rate remains elevated for
a period of time after the cessation of exercise. While other investigations
have examined the effect of intensity and duration of prior exercise, the
purpose of this study was to examine the effect of exercise mode and the
employment of different muscle masses on the elevation of post-exercise
metabolic rate (EPOC). Fifteen non-smoking, physically active females (21.1 ±
1.3 years; 21.4 ± 4.6 %BF) volunteered for this investigation. Each subject
completed a graded maximal exercise test (GXT) on the Monark 880 cycle
ergometer (Max HR=192.5 ± 2.3 bpm; Max V02=2.68 ± O.lll/min; Max
RPE=19.5 ± 0.1) from which a heart rate corresponding to 70% V02max was
chosen. Subjects then exercised on either a Monark 880 cycle ergometer (LE)
or the Schwinn Airdyne (ALE) in random order for thirty minutes at the
prescribed heart rate (HR). Exercise bouts were separated from each other and
from the GXT by at least 48 hours. Workloads were monitored in five
minute intervals and adjusted to maintain the appropriate heart rate. The
mean exercise heart rates were 172.5 ± 2.8 bpm for the LE bout and 170.0 ± 2.8
bpm for the ALE bout, respectively. Two-way repeated measures ANOVA
revealed no significant difference \r >0.05) between exercise treatments in
terms of HR or V02. Repeated measures trend analYSis revealed no significant difference in either EPOC or post-exercise heart rate between the
two treatments across a one-hour seated recovery period. There was also no
significant difference (p>O.05) in excess post-exercise caloric expenditure
during the recovery period as a result of the different exercise treatments.
Therefore, this suggests that neither exercise modality nor the distribution of
work over a larger muscle mass had an effect on EPOC when exercise
intensity and duration were held constant.
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