We've recruited bona fide experts in the fields of exercise science and nutrition to help us answer 17 questions that have historically been ripe for speculation, guesswork and hearsay. So now, instead of listening to the advice of your training partner's friend's roommate's sister, you can be the one giving it. But one word of caution: You may find your standing among old wives seriously downgraded. So, what really happens when . . .
1) You don't wear a belt during heavy lifting? According to nutrition and exercise guru Chris Aceto, there are two sides to this coin. "If you don't use a belt when lifting heavy, you could possibly injure yourself because belts support the abdominal and lower back muscles -- the stabilizers of the trunk region," he says. "Paradoxically, when people start out training with a belt, they don't build those stabilizer muscles, so the risk of injury increases as the strength of other muscles increases." In other words, use a belt only to help prevent possible injury on your heavier sets, not to take the place of supporting muscles.
2) You eat too much or too little protein?
We all know that protein builds and maintains muscle (at least all m&f readers do it). So we do our best to get the right amount of protein to reach our personal fitness goals. But what happens on those days your meal schedule gets derailed?
Aceto explains: "If you eat too much protein, the excess is sent to the liver, changed to a sugar and used as fuel, stored as glycogen or stored as bodyfat. Many people don't realize that protein can be stored as fat. Conversely, if you eat too little protein, you fall into a negative nitrogen balance, meaning there aren't enough amino acids to make your muscles grow." All the more reason to keep a log of your daily nutrient intake. Try to stick to 1-1.5 grams of protein per pound of bodyweight daily.
3) You get less than eight hours of sleep?
Sleep deprivation has reached epidemic levels in the United States. While eight hours of work, eight hours of play and eight hours of sleep used to represent the magic triangle of balance in a person's day, our current version is an isosceles, with the sleep side getting ever shorter. What does this mean to you, the dedicated trainer?
"Sleep need is an individual thing," notes m&f Science Editor Jim Stoppani, PhD. "But research supports the fact that most people require between seven and nine hours. You should strive for at least seven; otherwise you risk perturbations in your hormone levels, like growth hormone, which seven hours tend to gain more bodyfat."
