Summary
The transients of mean arterial blood pressure (\(\overline {BP} _a \)) and heart rate (f c) during rest-exercise and exercise-rest transitions have been studied in six healthy sport students. After 5 min of rest in an upright position on a cycle ergometer they exercised for 15 min and remained seated for a further 5 min. The subjects exercised at four different constant intensities (40 W, 80 W, 120 W, 160 W) in random order separated by at least 24 h. The\(\overline {BP} _a \) was determined by a noninvasive and continuous method. During the first minute of exercise, three phases of response could be distinguished, with the first two showing no clear relationship to intensity. Phase 1 consisted of simultaneous increases in bothf c and BP during the first 6 s. In phase 2,\(\overline {BP} _a \) decreased whilef c continued to increase. During phase 3,\(\overline {BP} _a \) andf c approximated constant values or a linear increase. Both parameters showed no comparable intensity-independent reactions during the off-transients. In conclusion, during the first 15 s of rest-exercise transitions there seems to be a fast and uniform cardiovascular drive which overrode other influences onf c.
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Baum, K., Eßfeld, D., Leyk, D. et al. Blood pressure and heart rate during rest-exercise and exercise-rest transitions. Europ. J. Appl. Physiol. 64, 134–138 (1992). https://doi.org/10.1007/BF00717950
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DOI: https://doi.org/10.1007/BF00717950