My tdee is around 2650. Im eating about 2050 calories a day which is 600 calories a day deficit from diet alone. I am doing p90x to try and get as lean as possible by summer. I'm on my 3rd week. I havent noticed much progress, my diet is pretty good ive made posts on the forum and people have helped me out. I was thinking about doing some low intensity cardio 3x a week. Wed, Friday, and Sunday.
My question is in general if i kept a 600 calorie deficit, and started doing additional cardio would i be at risk for muscle loss? Im getting 190g of protein, i weigh about 170lbs. Then if i decided to add even more cardio to say 5x a week, would i be burning strictly fat if i stayed in my fat burning heart rate zone?
Basically is it ever bad to do a lot of cardio even with a diet around 2k cals or is there always the risk of losing muscle?