Originally Posted by
BobbyG
gobicycling I swam 40-45 minutes a morning in my 20s and that's quite an expenditure! The fact that you then walk and ride in the same morning with your challenges is admirable and inspirational. go, Go, GO!
People don't realize that swimming takes a whole different set of muscles and aerobic endurance. I've seen folks who were fit from bicycling and or running get entirely pooped out the first time they tried to swim a lap in the pool.