I want to start integrating more running into my workout. From past experience, if I just do sprints I keep my size and get bigger while if I run a few miles for my cardio, I loose a lot of muscle. I don't like just doin sprints tho, I want endurance too. So besides just uping my carb intake this time, I'm thinking about adding a supplement like glutamine to try to stop from burning too much muscle. What do byall think? I've never used it before.