I'm not sure but yesterday I swam a mile in 50 degree water (with my wetsuit) and I was pretty tired even tho I usually do 3 miles in the pool. I guess staying warm takes energy. Felt great tho!
I'm not sure but yesterday I swam a mile in 50 degree water (with my wetsuit) and I was pretty tired even tho I usually do 3 miles in the pool. I guess staying warm takes energy. Felt great tho!