sit on swiss ball, alternately lift heels while maintaining balance with arms crossed over chest.
Sit on the Swiss ball, with feet touches the floor and hips-knees at 90-90 degrees and arms crossed over chest. With maintaing the balance, lift one heel off the floor, lower the heel and lift another heel. Repeat by alternating heel raise.
Nothing here is a prescription. Your physiotherapist decides which of these are yours, and when.
