Hey guys, I want to purchase a fitball / Swissball to help with my back, which isn't too great. How do I know what size to purchase? I am 174 cm tall, or 5' 8" in the old money. Is there some sort of guide as to what size you need? I plan to sit on it and use it for exercises as well, or are the two uses not really compatible? Any advice?
Cheers, Acolyte.
Cheers, Acolyte.