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I commute by bike. After sitting at my programming job all day, I'm pretty wound up and I start off my trip home with a mighty sprint that leaves me panting, and with a high heart rate.
I'm guessing my heart rate goes from 70 to about 170 in 20 seconds or so.
Is this bad? I feel like I can remember being warned before about making my heart rate spike upwards.
Hearth rate is a consequence of how you use your body. It is regulated by catecholamines ( a class of hormones that includes adrenaline and noradrenaline ).
It's not a problem if you do that in such short amount of time. A lot of sports require immediate changes of pace in terms running or cycling.
