deteriorating muscle

i heard that doing treadmills at high speed will burn away not only fat but muscles as well. im trying to build up on muscle as well, so i would like to know how to prevent the muscles from being burned up.
 
it depends on how long you are doing it if your doing hiit cardio i would say 30mins is fine ..slow steady cardio 1hr imo
take protein before and a sports drink during you should have no problem
what happens is normally when doing weights or high intensity training between 45mins and an hour the body has used up its glycogen and releases cortisol this uses muscle as energy,
so as long as you refuel or dont do as long then you should be fine.good luck:D
 
Back
Top