The main function of strength training for older people is to maintain muscle mass and bone density. Exercise is for reducing symptoms and risk of most of chronic diseases such as arthritis, diabetes, coronary artery disease, obesity and osteoporosis. Within twelve weeks of strength training there is marked improvement in flexibility, muscle strength, endurance in cardio-respiration and pain.
According to "American Dietary Guidelines of 2005", good health of a person requires physical exercise and good diet. The importance is given on exercise presently. Bicycling, gardening or bicycling are categorized into moderate physical activity. To maintain the weight of the body and energy level , sixty minutes of activity is required normally. At least thirty minutes of physical activity every second day is necessary to reduce chronic disease.
When a person gets older and doesn't have enough intake of proteins along with very less exercise, a condition is developed that is a called Sarcopenia. From the age of 45 years usually the muscle mass reduces at the rate of one percent per annum. The experts states that the gradual loss of mass in elderly people is attributed to lack of exercise, increased weakness and deficiency of protein
The resistance or strength training is safe as well as effective in reversing weakness .and sarcopenia as show by researchers. They are doing reassessment of protein requirement for adults to search new methods to prevent and check muscle loss. Catabolism is the process in which body metabolizes itself. In case of protein deficiency catabolism takes away amino acids from muscle tissue which may lead to muscle loss and ultimately to weakness.
Those who consume insufficient protein carry health risks. Though low protein diet is recommended for people with liver problems and chronic disease in kidney but that leads to muscle loss. Diets with protein restriction may be required to be taken by those with problem of not excreting sufficient amount of nitrogen through urine.
A study was conducted on volunteers having kidney disease of chronic nature at a university. In the group under study, half of them were put under diet control and half of them were given resistance training. All of them were given low protein diet. The group doing exercise had their sessions of forty five minutes thrice a week for twelve weeks, their muscle strength increase by 30 percent and muscle fiber by 32 percent. This improved their body strength; the volunteers were able to do their daily work such as cleaning house, climbing stairs and groceries shopping. The better results are associated with strength training in older people.
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