Debunking Fitness Myths

A recent article synidicated by the Washington Post explored 10 common fitness myths, and challenged some time-held fitness beliefs. Here is a highlight, interspersed with some of my own comments. 1. A HIGHER NUMBER ON THE SCALE MEANS YOUR GETTING FATTER: This fails to take into account body composition. You can actually get leaner, with the scale staying the same or going up, by building muscle mass. Often, your waist size shrinks, your shoulders increase circumference, and your legs develop previously-unseen tone by strength-training. The scale, bottom-line, is not, in and of itself, an indicator of fitness. If you strictly want to lose weight, smoking three packs of cigarettes a day may help! Would that make you healthier? 2. LIFTING WEIGHTS MAKES WOMEN BULKY: Actually, the opposite is usually the case. In all my 25-plus years working in health clubs, I've only met a handful of women who were able to build up significant muscle mass to the point where they would be thought of as "overly muscular" or "bulky." Most women (and middle-aged men) simply don't have the testosterone levels to achieve this. Your "butt won't get fat" by doing squats or lunges, in fact, it will most likely get much smaller! 3. WHEN YOU STOP TRAINING, MUSCLES TURN TO FAT: They are like "apples and cotton candy," two different types of tissue. Apples, like muscles, are dense. Cotton candy, like fat, has little density, but a wide circumference. But apples can not turn into cotton candy, and muscle can not turn into fat. 4. RUNNING ON A TREADMILL IS BETTER FOR JOINTS THAN RUNNING OUTSIDE. Many fitness experts feel this is not the case, unless you are on a commercial-grade, extra shock-absorbing treadmill. As someone who logs many miles on both, I do feel the treadmill is easier on my body than the roads, if for no other reason than I can control the grade, and get off if discomfort occurs. That's obviously not possible four miles from home! 5. MODERATE AEROBIC WORK PUTS YOU IN THE IDEAL FAT-BURNING ZONE: While you burn a slightly higher percentage of calories from fat when your heart-rate is at 60-80% of your max (220-your age), you burn more total calories the higher your heart-rate is. In any given run, however, you will spend some time in the 60-80% range, some higher, and cool down at the lower rate, again. You can't burst out the door full blast woithout tearing or ripping something, and even if you did, you could not sustain that for very long. 6. AS LONG AS YOU EXERCISE, YOU CAN EAT ANYTHING YOU WANT: First, genetics is 50% of the way you look, no matter what. If your parents are heavy, chances are you are going to have to battle your whole life. Secondly, you have to create a calorie deficit to lose weight. If I were to do a hard 10-mile run, I would be burning up approximately 1100 calories. If I were to relax with four slices of pepperoni pizza and two beers after, I would be at just about even...contented, but just about even. That's how hard it is to lose weight through exercise alone. 7. MACHINES ARE SAFER THAN FREE WEIGHTS: Generally, I find, yes. However, not all machines are designed for every body. There is also usually one or two directions the machines can go, and it is does nothing to address balance and stability issues. Your height or weight may also not be suitable for every machine, particularly if the seats are not adjustable. I like to mix most strength-training workouts between machines, free weights, dumbells, and body weight exercises. Resistance bands, Gliding discs, and kettlebells are also great instruments to use. 8. IF YOU DON'T SWEAT, YOUR NOT WORKING: This is where people will think they are getting a better workout on the elliptical, say, than the weights, because it's sustained motion and you will sweat more. That is true! However, the afterburn of a hard weight workout lasts longer than a cardio session, meaning your body is burning calories more efficiently for up to six hours, rather than three with a typical cardio workout. Also, everyone has a different body thermometer. I get cold easily, and tend not to sweat much in cooler weather. Other people are the opposite, and regulate their body in the heat by sweating profusely. Heart-rate is a much better indicator of your effort level, although there is something satisfying about a sweaty shirt! 9. FAT CAN BE SPOT REDUCED: Everyone would be looking like a fitness model if that was the case! As I mentioned before, genetics is 50%, and if your parents both have thick legs, say, chances are you will as well. With diet, cardio, and weights, you will re-shape your body in general, but genetics will likely determine where you lose it from. 10. STRETCHING BEFORE EXERCISE IMPROVES PERFOMANCE: I use the analogy of the belts in your car. They're more likely to snap in the cold, and are more pliable after the car has been running for awhile. Before a race, I like to jog and then do "active stretches" like leg kicks or modified lunges to stay loose. After a run is the time for the static, relaxing stretches we are all familiar with.