I just need to know what size ball I should be using. I have two
different sizes at home...I am 5'2"
Are the balls supposed to be hard or soft?
Thanks Lori
when you sit on the ball - your legs/knees should be at a 90' angle. If is it less or too bent - the ball is too small or not inflated enough. If it is more - then the ball is too big or has too much air in it.