
sit on swiss ball with hips and knees at ninety degrees, lift one foot four to five inches while maintaining balance.
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 foot off the floor by 4-5 inch. Lower down the leg to starting position and repeat.
Nothing here is a prescription. Your physiotherapist decides which of these are yours, and when.