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Research has shown that strengthening exercises are both safe and effective for women and men of all ages, including those who are not in perfect health. In fact, people with health concerns, such as heart disease or arthritis, often benefit the most from an exercise program that includes lifting weights a few times each week. Strength training, particularly in conjunction with regular aerobic exercise, can also have a profound impact on a person's mental and emotional health.
There are numerous benefits to strength training regularly, particularly as you grow older. It can be very powerful in reducing the signs and symptoms of numerous diseases and chronic
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. The effectiveness of strength training to ease the pain of osteoarthritis was just as potent, if not more potent, as medications. Similar effects of strength training have been seen in patients with rheumatoid arthritis.
As we age, poor balance and flexibility contribute to falls and broken bones, which can result in significant disability and, in some cases, fatal complications. Strengthening exercises, when done properly and through the full range of motion, increase our 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.
Post-menopausal women can lose 1-2% of their bone mass annually. Results from a study conducted at Tufts University 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 is active tissue that 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.
Having type II diabetes increases your risk for heart and renal disease, and it is 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, 16 weeks of strength training produced dramatic improvements in glucose control that are comparable to taking diabetes medication. Additionally, the study volunteers were stronger, gained muscle, lost body fat, had less depression and felt much more self-confident.
For people who are depressed, strength training offers improvements similar to 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. It is most likely 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. The American Heart Association recommends strength training as a way to reduce your risk of heart disease and as a therapy for patients in cardiac rehabilitation programs.
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 maintains the heart and lungs and increases cardiovascular fitness and endurance—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.
Source: Centers for Disease Control & Prevention