Cardiorespiratory responses to exercises of equal relative intensity distributed between the upper and lower body
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CONTRIBUTORS:
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JOURNAL:
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YEAR:
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1998
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PUB TYPE:
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Journal Article
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SUBJECT(S):
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CARDIOVASCULAR-SYSTEM; RESPIRATORY-SYSTEM; EXERCISE; TRAINING-LOAD; ROWING-ERGOMETRY; WOMAN; YOUNG-ADULT; ARM; LEG; COMPARATIVE-STUDY
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DISCIPLINE:
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No discipline assigned
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HTTP:
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LANGUAGE:
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English
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PUB ID:
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103-366-592
(Last edited on
2002/02/27 18:44:59 US/Mountain)
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SPONSOR(S):
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ABSTRACT:
The principles underlying the cardiorespiratory responses to upper body versus lower body exercise remain unclear. We explored the hypothesis that workloads of the same percentage of maximum strength for a particular part of the body might elicit similar cardiovascular responses. Twelve trained female university rowers (mean plus/minus s: age, 22.8 plus/minus 1.3 years; body mass, 66.9 plus/minus 1.8 kg; height, 169 plus/minus 6 cm; body fat, 18 plus/minus 2 percent; HRpeak, 190 plus/minus 3 beats min-1; VO2peak, 50.7 plus/minus 2.6 ml kg-1min-1) performed four 12 min exercise trials on a rowing ergometer. Arm rowing, leg extension and arm rowing plus leg extension workloads were set at 20 percent of the mean of their respective three-repetition maximum (3-RM). The combination of arm rowing and leg extension was also performed in a reciprocal workload fashion; that is, the arm workload was 20 percent of the mean 3-RM for leg extension, and the leg extension workload was 20 percent of the mean 3-RM for arm rowing. Analysis of variance and Tukey HSD showed that, although the power output for leg extension was 144 percent higher than for arm rowing, the mean VO2, VE and heart rate values were not significantly different between exercise modes. Oxygen uptake for reciprocal arm rowing plus leg extension, with the arms performing 71 percent of the total power output, was not significantly different from non-reciprocal arm rowing plus leg extension; however, the VE and heart rate values were higher. Our results suggest that, during submaximal exercise, cardiorespiratory responses to upper body exercise do not differ significantly from those to lower body exercise, so long as the upper and lower body workloads are set at an equal relative strength level.
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