Subject: RE: Running HR vs. Biking HRI have the similar thing going on....when I swim I'm probably around 135-140 (going hard ) but when I run (probably 8:30 mile pace ) I'm at 155-160...
but regarding the max heart rate, I was told that we should re-evaluate our max HR occasionally, especially if we're going from being out of shape to being in shape. As we get more in shape, our max HR will change as our body gets more efficient at running/biking/swimming and then adjust your zones accordingly.
So for now I'd say to just go at whatever pace is necessary to keep you in the right zone according to your max HR.
OH, and regarding why the heart rate is lower...I don't know the muscles in use between running and biking, but for swimming, the muscles change from primarily legs (large muscles ) to the arms (smaller muscles and less oxygen needed ) but also a difference is that your blood is being pumped more hortizontally for biking (torso hort and legs vertical ) than running (torso and legs vertical ) and even more hortizontally for swimming (torso and legs hort ), so your heart doesn't have to work as hard because there isn't gravity to pump against. Edited by eviltangerine 2005-02-24 11:40 AM
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