A personal trainer says this is the best workout for building strength if you're over 60 and have limited mobility

Woman wearing a purple tshirt facing the camera, smiling and holding a small orange dumbbell in each hand at shoulder height half way through an overhead press. .

Strength training is a useful tool at any age, but it's particularly important as we get older.

Sarcopenia, the natural decline of muscle mass and function, begins around age 35 and accelerates significantly at age 60, according to Harvard Health