Walking 20 minutes a day from age 55 is great. The secret to healthy aging is to start much earlier

Walking daily offers major health benefits in later life, but the biggest gains come from staying active earlier, too.

Recent evidence links walking and regular physical activity with longer life and lower risk of disease.

Starting before age 55 may help slow age-related muscle loss and preserve function.

WHO guidelines recommend weekly aerobic exercise, strength training, and balance work for adults over 65.