Grind a tablespoon of pot, whichever strain you want — sativas will keep you from wanting to stay
on the couch (Ben found approximately 1.5 g to be a
sweet spot for him,
close to 15 mg THC), but indicas will be better for relieving discomfort, if you're aiming to go for a longer distance, so it's up to you and what you're used to (Ben
noted that hybrid stains with a blend of indica and sativa are good for any kind of workout — particularly a strain called Lemon Haze).