- Proportional decrease in the duration of diastole as well as systole
- Less duration of diastole and more duration of systole
- Same duration of diastole and less duration of systole
- Much more decrease in the duration of diastole than that of systole
The cardiac cycle time during normal heart beat is 0.8 seconds which includes both systole and diastole. In the event of fast running, the heart starts beating faster leading to decrease in cardiac cycle timings. This decrease is due to___________
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