Why the study?
How does prolonged cycling exercise affect heart rate and systolic/diastolic time intervals in healthy males and long distance runners?
Population
14 healthy males (7 healthy male students and 7 male collegiate long distance runners)
Comparison
60-min bicycle ergometer exercise loaded at 30%… vs Resting values
Design
Other
Follow-up
60 minutes of exercise plus recovery period
Authors
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Diastolic shortening may drive early HR rise during cycling; leaves open its role in prolonged exercise or training adaptations.
How does prolonged cycling exercise affect heart rate and systolic/diastolic time intervals in healthy males and long distance runners?
Prolonged cycling exercise increases heart rate primarily through a marked decrease in left ventricular diastolic time.
Yoshibumi Nakahara (1989) studied this question.