To Much Cardio?

[xTheStuffX]

I get a lot of carbs so i run for 20 mins before school and then swim for 15 to 20 mins at night..will this burn muscle? I do this everyday and weight train every other

 

[Liftbig]

how much do you eat?

 

[Smurfy]

instead of just running at the same pace for 20 min, why not try sprinting. this type of HIIT is muscle-sparing.