HEART RATE RESPONSIVENESS IS DIFFERENT BETWEEN SUBMAXIMAL AND HIGH-LEVEL EXERCISE INTENSITIES
Down, R. J., Krishnan, B., Burgess, J. J., Busse, E. F., & Haennel, R. G. (2001). The relationship between heart rate kinetics and relative exercise intensity. Medicine and Science in Sports and Exercise, 33(5), Supplement abstract 612.
Males (N = 13) performed incremental intensity cycle tests to observe heart rate kinetic relationships with exercise intensity (50, 60, 70, 80, and 90% VO2 reserve).
There were no significant differences in magnitude of heart rate increase among the five targeted intensities however, the pattern of heart rate increase changed significantly at 70%. One pattern of response was exhibited at 70% and above were similar, while a different pattern occurred at 50% and 60%.
There was no predictable relationship between pattern of heart rate rise and step increments in exercise intensity. Heart rate kinetics during submaximal work (< 70%) appeared significantly faster than at higher intensities.
Implication. Heart rate responses to different levels or exercise intensity vary. At submaximal intensities, adjustments occur quickly, but at higher intensities, adjustments occur more slowly.
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