Fuck the gym man. It's cool if you're into that, but you don't seem that way. I say if you have a bike, blaze up and ride that thing. It feels wonderful to explore your town and have the wind on your face when you're nice and stoned. You also don't get fatigued as quickly, you get some workout, it's enjoyable and a great way to spend a high. Get a couple of friends to go riding. Orr you can always skate!