The benefits of exercise diminish within weeks after a person stops exercising. Heart strength, muscle strength, and the level of HDL cholesterol decrease, whereas blood pressure and body fat increase. Even former athletes who stop exercising do not retain measurable long-term benefits. However, people who were physically active in the past often can regain fitness faster.
“Exercise of various types can help prevent osteoporosis, thinning of bones, fracture risk, and falls that are associated with fractures of the hip, spine, and wrist,” says Larry McCleary, MD, retired acting chief of neurosurgery at Denver Children’s Hospital in Colorado, and author of Feed Your Brain, Lose Your Belly. “Types of exercise that help include aerobic exercise, resistance training, and even exercises that increase balance and agility.” Tai chi may also be beneficial when it comes to improving balance and muscle strength.
This may be the most worthwhile reason for exercising there is. Studies have shown how people who exercise are at a significantly reduced risk of developing dementia like Alzheimer’s disease. And even for people who start exercising relatively late in life, brain volume can actually increase over time, as can scores on memory tests, compared to people who don’t exercise (their brains shrunk over time, which is normal part of aging).
A study published in October 2017 in the American Journal of Psychiatry suggested that even just one hour of exercise of any intensity each week can help prevent depression. The study monitored levels of exercise and symptoms of depression and anxiety in 33,908 adults over 11 years and found that even small amounts of physical activity had a protective effect against depression, regardless of the person’s age or gender.
Exercise has been shown to lengthen lifespan by as much as five years. A small new study suggests that moderate-intensity exercise may slow down the aging of cells. As humans get older and their cells divide over and over again, their telomeres—the protective caps on the end of chromosomes—get shorter. To see how exercise affects telomeres, researchers took a muscle biopsy and blood samples from 10 healthy people before and after a 45-minute ride on a stationary bicycle. They found that exercise increased levels of a molecule that protects telomeres, ultimately slowing how quickly they shorten over time. Exercise, then, appears to slow aging at the cellular level.
Get down on all fours with your knees placed directly below your hips and palms placed directly below your shoulders. Now, raise your right arm forward and stretch your left leg backward at the same time. Create a tension in your back by flexing your foot. Hold the position for a few seconds and then come back to the starting position. Repeat the same using your left arm and right leg. Repeat 15 to 20 times on both sides.