should I try glutamine?
 

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.

Try BCAAs. They might actually help. Glutamine won't do what you're looking for.

Edit: Ross beat me to the post! :)
I haven't heard good things about glut. Heard it's a waste of $. Take some protein before and after you run, and/or some bcaas during the run, if it's a long one.

how long before? and what kind, whey?

Soon before...30 min to an hour before. Whey would be best.

Mr. Ross' right. It absorbs the fastest, compared to soy, or casein proteins, which dissolve slower. Take soy protein and especially casein before bedtime, to prevent muscle breakdown while sleeping.

Would creatine also help him?

Creatine would be beneficial for springs, but not long distance/low intensity running.

There's a fine line between doing too much cardio and not enough when it comes to building muscle mass while trying staying lean. Too much cardio without enough calories will bring you into a catabolic state and you will lose muscle. If you're doing a lot of vigorous exercises like running, supplements can help. You may also need to increase you caloric intake.

I agree with Arnold1, no matter how much you try if you are burning more calories than you are taking in you are going to hit the catabolic state (burning muscle).
Glutamine is good for muscle soreness and recovery.