So I finally decided to get back in the gym and put some meats back on my bones after a few years of being lazy. The issue that I seem to be having this time around is that Im really lacking the endurance I used to have during my workout. Im assuming its partially because Im still "reconditioning" my body and muscles but, it seems weird that Im pretty much exhausted after 20-30 minutes of a not very difficult routine. So Ive tried what I used to do which is eating a couple meat sandwiches about an hour or two before the gym which helps a little but, not enough. Then I went to GNC and told them my issue and the guy sold me on some cellucor c4 which seems to really wake up my brain but, has no effect on my physical endurance. So should I try something different or just wait a few weeks and see if my stamina just naturally gets better?