 | Simple Principle |
- The basic principle of cross training is simple: take part in various activities that supplement each other. Runners should lift some weights or at least shoot a few hoops to keep those arms and shoulders toned. Bikers should walk or run now and then to keep their bones healthy. (Bicycling, since it is not a weight bearing exercise, does little to promote bone strength.) Swimmers should find something to do on dry land so that their bones react to gravity and grow stronger. And, no matter what your sport, you should stay well-nourished and supplied with plenty of antioxidants. As Stephen T. Sinatra, MD, points out in Optimum Health (Bantam), while athletes may enjoy health benefits from exercise, "The vigorous training pursued by competitive athletes renders them more prone to catabolic stress-a situation in which tissues are constantly broken down." He goes on to point out that the low fat diet many athletes follow may be short of antioxidant nutrients. Unfortunately, that shortage can lead to injury. The metabolic acceleration caused by athletic activity may increase potentially harmful oxidative stress at the cellular level. Without antioxidant nutrients to help quell that stress... Well, the results may not be pretty. Potentially, that kind of oxidative damage may, theoretically, lead to cancer or heart disease. As Dr. Sinatra says, in those circumstances, "the supplemental use of glutathione, vitamins C and E, coenzyme Q10 and magnesium seems reasonable. Some athletes, such as menstruating women, may also need iron supplementation." In addition, water is crucial for athletes to stay adequately hydrated during activity. According to Daniel Gastelu and Fred Hatfield, PhD, in Dynamic Nutrition for Maximum Performance (Avery), when you run short of water "this can adversely affect performance and, in the long run, can cause peaks and valleys in the athlete's performance." In addition, they advise using sports drinks to stay adequately supplied with electrolytes. "The major electrolytes found in bodily fluids are chloride, magnesium, potassium and sodium." Electrolytes serve a host of duties, including keeping the heart muscle functioning properly. Gastelu and Hatfield explain, "An electrolyte is an ion that is required by the body to regulate the electric charge and flow of water between the cells and the bloodstream."
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