Before I ran into some relationship issues I was running 4.5-7 miles/day and then hitting the gym for 45mins-1.5hrs (depending on the workout). I would do this 5 days a week (if possible). There are a lot of people i've talked to that don't recommend it for various reason, but I've always done it because it gets me in great shape health wise and for whatever reason I feel like I'm able to do more in the gym (more reps due to better overall endurance). I figure I'd let the F&N scientists give me the run down on the pros/cons, and if its recommended at all health wise. Also, what kind of diet should I be on if i want to bulk out muscle wise but still maintain speed/endurance (p/c/f)? I was also thinking about starting up creatine for the first time to help me get some bulk back from not eating. Never used it before and I don't know how it would affect my running seeing as how I normally see it advertised as a short burst workout fuel. I'm about 6'2" 150lbs right now (haven't been eating cause of the GF issues) with probably 6% bf -+ 1%. When I was working out a few years ago I was able to hit about 175lbs, just as lean - but I never paid attention to nutrition. Trying to do it right this time around.