My speculation is that Biebel loves the Hollywood life, and he knew he was over skateboarding professionally...
At that point, he probably started taking a PED and with his enhanced state proceeded to film himself skating his park everyday (while working out to get big like he is now).
After that, he became too big and too full of human growth hormone to skate, so he was ready for his final transformation into the current meatball state we know as Strength Cartel's Brandon Biebel.
From a fitness perspective, the first thing people do when they're "enhanced" is gloating about how much food they can eat and how much they can work out.
Working out 7 days a week and also doing double digit miles for cardio every day is just unhealthy and impossible without drugs.