My new wrestling coach keeps suggesting that I start bulking up as it helps burn the fat easier and that it will make me more fit overall. I'm 5'9 and 165 lbs. I compete at 152 for wrestling and 2 years ago I made 138 for a Jiu-Jitsu tournament, while a few months prior to it I was 160 lbs. I'm trying to lean out to a walk around weight of 155, because I really want to compete at 135. I have about 15% body fat and I haven't been able to really work out as much as I should have ever since wrestling ended. Is it better for me to lean out to 155 by doing cardio and conditioning or should I take his advice and do weight training?