Quote (___ @ Tue - Mar 19 2013 - 18:28:41)
does swimming underwater provide a comparable cardiovascular effect?
i always loved swimming under water, but never really had the quardnatian for above water
im not sure, how do you mean like with a snorkel or scuba?
also, ran 6 miles at 6.5 mph pace. after my pulse was 160, lol. i can run that forever i think except my knees eventually hurt (shoulders too, another lol)