My 15year old son has just started weight training for football . He has grain 15 pounds over 4 months is it okay for him to start taking supplements if so what. PS I don't count MTS whey as you said that is just food thank you

Marc, how do you feel about taking a pre workout for crossfit and various types of hiit? I've read and heard to avoid them due to how elevated your heart rate gets during this type of training and adding a preworkout will elevate your heart rate to an unhealthy level. What do you recommend? Thank you. 

marc, i am on my second cycle.  half way in i have already put on another 10lbs.  the issue is that i seem to be developing that bodybuilder gut where the top part of my stomach barrels out a bit when i take deep breaths or don't posture.  i am not on HGH or insulin.  i am thinking it is from the massive increase in caloric intake.  am i not controlling portions well enough so my stomach is expanding each time i eat?  what do i do to take in the amount of calories necessary but not get this hard barrel upper stomach.  i still have abs, so it's so confusing!!

Hello! When training chest my triceps dominate and I struggle to grow my chest. The problem is that I work out at home where I do not have access to specialized equipment. I have access to a Power rack, dumbbells and barbells. What tips can you give me... P.S I had shoulder surgery so just pushups give me too much pain.

How much nitric oxide should I take for the best pump?