Conditioning Myths and Half-Truths

(about.com) - Conditioning Myth 1: No Pain, No Gain

Exercise does not need to hurt to be good for you. In fact, if it does hurt you’re probably doing something wrong. Some soreness is common for a first time exerciser, but if that continues, you are pushing way too hard. Delayed onset muscle soreness, in which pain occurs up to 48 hours after exercise, results from inflammation and microscopic tears in the elastic tissues that surround muscle fibers. To give muscles time to adapt, don’t do much too soon, or you will risk injury.

Conditioning Myth 2: Excessive Sweating While Exercising Means You’re Not Fit

In fact, it's just the opposite. Sweating during exercise is a sign of an efficient cooler. An athlete who has adapted to keep the body core cool during exercise will shunt blood to the skin’s surface more quickly and release heat from the body. At the same time, the sweat glands increase their output and thus cool the body during sweat evaporation. While fit people produce more sweat than sedentary folks, they lose less sodium, because more of it is reabsorbed by the body. The result is a more efficient cooler.

Conditioning Myth 3: To Build Muscles, Eat High-Protein Foods

There is no scientific evidence supporting the popular belief that athletes require massive amounts of protein. According to Dr. Suzanne Nelson Steen, head of the University of Washington Huskies Sports Nutrition Program, strength athletes require high carbohydrate and adequate glycogen stored in the muscle. She points out that all high intensity, powerful muscle contractions (such as weight lifting) are fueled with carbohydrate. "Neither fat nor protein can be oxidized rapidly enough to meet the demands of high-intensity exercise. Adequate dietary carbohydrate must be consumed on a daily basis to restore glycogen levels." To build more muscles, you simply have to follow a good weight training program and eat a well balanced diet consistently.

Conditioning Myth 4: If You Stop Exercising, Your Muscles Will Turn to Fat

Fat and muscles are two different tissue types. One can not convert to the other. The truth is that muscles atrophy when not used. Therefore, if you continue to eat as you always have, but stop exercising, you will see an increase in body fat and a loss of muscle mass. Of course, the real question is "why are you stopping exercise in the first place?"

Conditioning Myth 5: You Can Increase Fat Burning By Exercising Longer at a Lower Intensity

It really isn't important what percentage of energy during exercise comes from fat or carbohydrate. What matters at the end of the day is how many total calories were expended. The higher the exercise intensity, the more calories are burned per minute. Many new exercisers, however, are encouraged to exercise at a lower intensity because high-intensity exercise is difficult to sustain, and safer.

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