This exercise strengthens the core.
1 Start on your back with your knees bent and feet flat on the bed.
2 Keeping your back flat, squeeze a ball or pillow between your knees and lift your hips up into a bridge for 10 seconds. Repeat 10 repetitions.
3 Next place a belt or resistive band tied around the thighs, push out into the band and lift your hips up into a bridge, hold for 10 seconds and repeat 10 repetitions.
Once you've finished the exercise, click to see what percentage you have completed.