Is it possible to put on muscle and be a runner? Of course it is! If you’re following a strength training regimen and you get your nutrition right, there is no reason you won’t be able to put on lean muscle mass; it just requires some planning and a bit of simple math. I’m terrible at math so if I can do it, you can too.Energy balanceThe laws of thermodynamics are the basis for gaining and losing weight at a fundamental level. If you’re eating in energy balance (maintenance), then you’re main...