Yeah there's probably some, the problem is motivation. I can go to a class and workout hard for hours, and not really notice. After a few minutes of running I'm

Yeah there's probably some, the problem is motivation. I can go to a class and workout hard for hours, and not really notice. After a few minutes of running I'm ready to call it a day. Same for surfing, keeping busy with a skateboard though. Paddle endurance is taking a hit.