Can somebody please explain to me about optimum heart rate?
My treadmill has a heart rate function-- it gives three ranges-- weight loss, cardiovascular, and above maximum. I do three minute walk/run intervals. I've used my treadmill for a long time but I'm pretty new to the running intervals.
Where should my heart rate be? Should I be keeping it in the cardiovascular range? Should it recover during my walk intervals? Recover to what?
How bad is it if I exceed my maximum heart rate? Sometimes toward the end of my workout my heart rate will be just over the maximum... it always freaks me out and makes me think I'm about to have a heart attack even though I feel fine.