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A member asked:
Swimmer in excellent condition, can swim laps vigorously for an hour, tried to run a 5k and couldn't run for 15 min. is it bc of the muscle mass?
A doctor has provided 1 answer
Hard to say: That is unusual as you would expect a swimmer to have excellent aerobic condition. Probably the best explanation is the use of a different set of muscles going from swimming to running that are becoming fatigued early because they are relatively deconditioned. If running is important to you, it is certainly likely you would be able to train through it.
Answered 11/28/2017
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