Do 10 glute bridges

Lift your hips off the floor while lying on your back.

Why it helps

Glute bridges strengthen your hips and back of your legs, which do a lot of work when you walk and climb stairs.

How to do it

1. Lie on your back, knees bent, feet flat hip-width apart.
2. Squeeze your buttocks and lift your hips until your body is in a line.
3. Lower slowly. Repeat ten times.

Make it easier

Lift only a few inches.

Make it harder

Hold the top for three seconds each rep.

Stop if you feel pain in your lower back.