Gym ball - less demanding exercises
Gym ball or also known as Swiss ball is a great exercise tool in rehabilitation, fitness exercising, balance exercising as well as just for sitting.
When choosing the ball, size is important. When you sit on the gym ball and you place your feet on the ground, your hips and knees should be in a right angle. The advantage of gym ball is that it is not entirely stable, and so you can constantly train your balance and stretch many muscles.