My #1 barrier to working out as long as I want to is, I believe, my heart. I basically just go till I get nauseous. That makes me think I should equally work on aerobic, so I can weight-train for longer without feeling sick.
However, as a very metabolic ectomorph, I’m wary of the calorie consumption and having it ramp up my metabolism even more, robbing me of needed fuel for muscle growth.
Given my goal of hypertrophy before any other kind of gain, what are some good suggestions for someone of my biology?