A Comparison of Metabolic and Physiological Responses to Continuous and Interval Exercise using Arm Crank Ergometry
Cardiff Metropolitan University
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In this study physiological and metabolic responses to continuous and interval exercise were compared using an arm crank ergometer. Eight physically active male participants (21.6±0.5 years) completed a 30-min continuous submaximal and interval exercise test on separate days. Exercise intensities were prescribed as percentage of peak aerobic power (%Wpeak) following a preliminary peak oxygen uptake (VO2peak) test. Respiratory parameters including oxygen uptake, carbon dioxide production and respiratory exchange ratio were measured throughout exercise. These parameters were used to calculate total aerobic energy expenditure, as well as carbohydrate and fat oxidation. During interval exercise higher rates of carbohydrate oxidation were associated with increased energy expenditure. Statistical analysis revealed a significant effect of exercise modality on energy expenditure, oxygen consumption, and fat oxidation. There was no difference between protocols for heart rate, respiratory exchange ratio or relative proportions of substrate utilised.
DEGREE OF BACHELOR OF SCIENCE (HONOURS) INTERCALATED SPORT AND EXERCISE SCIENCE
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