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Gazzetta Medica Italiana Archivio per le Scienze Mediche 2017 January-February;176(1-2):35-40

DOI: 10.23736/S0393-3660.16.03295-X

Copyright © 2016 EDIZIONI MINERVA MEDICA

lingua: Inglese

Comparisons of energy expenditure, heart rate, and rating of perceived exertion according to various set time points for reaching target exercise intensity during treadmill exercise

Hyungkook LEE 1, Hyunseok JEE 2

1 Department of Sport Industry, Sangmyung University, Cheonan, South Korea; 2 Department of Rehabilitation Medicine, Seoul National University Bundang Hospital, Bundang, South Korea


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BACKGROUND: We aimed to compare the differences in energy expenditure, heart rate, and rating of perceived exertion according to various set time points for reaching a target exercise intensity during aerobic treadmill exercise. We therefore designed a training exercise program that reflected different exercise volumes caused by different durations for reaching a target heart rate.
METHODS: Thirteen young men (aged 23.2±1.69 yr) performed 30 min of treadmill exercise consisting of three exercise methods that used different time periods (5 min, 10 min, or 20 min after beginning the primary exercise) to reach target exercise intensity, as estimated by target heart rate (70% of maximal heart rate). Energy expenditure, heart rate, and rating of perceived exertion were measured.
RESULTS: There were slight but significant differences in heart rate, energy expenditure, and rating of perceived exertion (all P<0.01) among the three exercise methods (according to when the target exercise intensity was reached after beginning the primary exercise phase).
CONCLUSIONS: Individual variability in training responses should be considered in order for individuals to obtain maximal benefit from individualized exercise programs. Levels for favourable susceptibility to exercise should be set for people who show physiological and psychological responses to physical fitness.


KEY WORDS: Exercise test - Energy metabolism - Physical exertion - Heart rate

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