A Pilates instructor says this is the one move you should be doing to keep your body healthy as you age

A woman in an orange jacket and leggings clasps her hands together as she executes a squat outside. Her knees and hips are bent as she moves down into the position. Behind her we can see grass, a gravel path and trees.

It's normal for your muscles and joints to get tighter and weaker as you age, particularly if you spend a lot of time sitting down. This can lead to various aches and pains, as well as tightness or reduced mobility in the hips, shoulders and back.

Strength training is one of the best ways to prevent this and Pilates instructor Kerrie-Ann Bradley says there's one exercise everyone should be doing as they get older to keep their bodies feeling healthy.