Benefits of Strength Training for Older Adults
Apr 6, 2012
Why Strength Training?
Research has shown that strengthening exercise is safe and effective for women and men of all ages, including those who are not in perfect health. In fact, people with health concerns often benefit the most from an exercise program that includes lifting weights a few times each week.
Research and Background About Strength Training
Scientific research has shown that exercise can slow the physiological aging clock. While aerobic exercise, such as walking, jogging, or swimming, has many excellent health benefits it does not make your muscles strong. Strength training does. Studies have shown that lifting weights two or three times a week increases strength by building muscle mass and bone density.
One 12-month study conducted on postmenopausal women at Tufts University demonstrated 1% gains in hip and spine bone density, 75% increases in strength and 13% increases in dynamic balance with just two days per week of progressive strength training. The control group had losses in bone, strength, and balance. Strength training programs can also have a profound effect on reducing risk for falls, which translates to fewer fractures.
Benefits of Strength Training
Tufts University recently completed a strength-training program with older men and women with moderate to severe knee osteoarthritis. The results of this sixteen-week program showed that strength training decreased pain by 43%, increased muscle strength and general physical performance, improved the clinical signs and symptoms of the disease, and decreased disability. Strength training was shown to reduce the pain of osteoarthritis at an equal or higher level than medications.
Restoration of Balance and Reduction of Falls
As people age, poor balance and flexibility contribute to falls and broken bones. Strengthening exercises, when done properly and through the full range of motion, increase a person's flexibility and balance, which decrease the likelihood and severity of falls. One study in New Zealand in women 80 years of age and older showed a 40% reduction in falls with simple strength and balance training.
Strengthening of Bone
Post-menopausal women can lose 1-2% of their bone mass annually. Results from a study conducted at Tufts University, which were published in the Journal of the American Medical Association in 1994, showed that strength training increases bone density and reduces the risk for fractures among women aged 50-70.
Strength training is crucial to weight control, because individuals who have more muscle mass have a higher metabolic rate. Muscle tissue consumes calories while stored fat uses very little energy. Strength training can provide up to a 15% increase in metabolic rate, which is enormously helpful for weight loss and long-term weight control.
Improved Glucose Control
More than 14 million Americans have type II diabetes. In addition to being at greater risk for heart and renal disease, diabetes is also the leading cause of blindness in older adults. Fortunately, studies now show that lifestyle changes such as strength training have a profound impact on helping older adults manage their diabetes. In a recent study of Hispanic men and women, 16 weeks of strength training produced dramatic improvements in glucose control that are comparable to taking diabetes medication.
Healthy State of Mind
Strength training provides similar improvements in depression as anti-depressant medications. Currently, it is not known if this is because people feel better when they are stronger or if strength training produces a helpful biochemical change in the brain. Perhaps it is a combination of the two. When older adults participate in strength training programs, their self-confidence and self-esteem improve, which has a strong impact on their overall quality of life.
People who exercise regularly enjoy improved sleep quality. They fall asleep more quickly, sleep more deeply, awaken less often, and sleep longer. As with depression, the sleep benefits obtained as a result of strength training are comparable to treatment with medication but without the side effects or the expense.
Strength training is important for cardiac health because heart disease risk is lower when the body is leaner. One study found that cardiac patients gained not only strength and flexibility but also aerobic capacity when they did strength training three times a week as part of their rehabilitation program. This and other studies have prompted the American Heart Association to recommend strength training as a way to reduce risk of heart disease and as a therapy for patients in cardiac rehabilitation programs.