Yoga is believed to retard the aging process (if a person from young age adopts it), so why not yoga will aid in people with old age. Dr. Paul Galbraith, Author of the book "Reversing Aging" comments on the anti-aging effects of Yoga that yoga affects brain, glands, spine and internal organs and increase resistance of the body to diseases as well as increases vitality and rejuvenates glands. Yoga focuses on breathing. As we age, our breathing becomes incomplete because as we grow older, we lose flexibility in our ribcage and spine thereby causing lesser space for lungs expansion. So, we need to focus on deep breathing which slow down heart rate which in turn improves focus and increases concentration.
Research studies confirm that yoga has benefitted to people with old age in their sleep, arthritis, diabetes, hypertension, excess weight, anxiety, chronic pain, and respiratory disorders.