Aaron Marino of alpha m. addresses the question about whether you can be a runner and still put on size. Being a marathoner or professional runner is a different universe from a regular every-day runner. They train by running ultra miles and don’t perform a whole lot of body building type of work. Therefore, you can put on muscle mass with daily running.
In order to put on size, you need to work-out with weights and ingest fuel properly. Diet is key. You need to compensate for your cardio and bump-up calories during training runs. Carb-up before day leading up to the race so that the muscles are full of glycogen and glucose. Also, eat through your run.
Aaron gives examples of triathletes and Iron Man participants who are maintain a great deal of mass with arduous training sessions. Aaron runs 20-miles a week outside and has not lost muscle mass. If running can work for Aaron, it can work for you.
