That heart-pumping, give-it-your-all feeling is one of the reasons many of us run in the first place. And a ramped-up heart rate during any type of exercise is not only normal, it's necessary. But ...
That heart-pumping, give-it-your-all feeling is one of the reasons many of us run in the first place. And a ramped-up heart rate during any type of exercise is not only normal, it's necessary. But ...
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