I woke up, drank 25 grams of Whey protein.
And did HIIT. No carbs pre workout.
Simple question, did I lose muscle?
I did about 15-17 mins of HIIT..
I think I did, because I hit a plateau on my shoulder press 2 days later.
If I do the same but I do low intensity jogging for 15-20 mins, would I spare muscle that way?