classes are generally an hour long. cost will definitely vary, but usually goes from $8 to $15 per class. The gym I go to includes any fitness classes with the monthly fee, so that works out good.
That is a good idea it seems like with all of the stress on your muscles from surfing this would help. I know you are gonna laugh at me but has anyone tried the wii yoga
that wii yoga stuff os actually fun i've done it. also the wii fit board is also fun i enjoy that as well.