| I have been swimming about 1 - 3 miles / week for the last several months, training for triathlons. I will say that it has made great strides in my deltoids, moderate improvement in my lats and, surprisingly to me, increases in my biceps. It has not made me big, per se, but that was not my goal and if I wanted that I would hit the weights.
Most of the lifeguards I see are not bulky, but well defined. | 
