According to yoga philosophy, it's the flexibility of the spine, not the number of years, that determines a person's age. Yoga slows down the aging process by giving elasticity to the spine, firming up the skin, removing tension from the body, strengthening the abdominal muscles, eliminating the possibility of a double chin, improving the tone of flabby arm muscles, correcting poor posture, preventing dowager's hump and so on. Yoga lets you trade in characteristics of old age for characteristics of youth.
Yoga is dynamite to make you feel younger with heightened mental prowess. Longer life often ....