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Busting 8 Fitness Myths


Shoehorning your workout into a few days a week is challenging enough—don't make it tougher by buying into those nagging exercise misconceptions that may divert your attention from pursuing your better body goals.

Here are some popular fitness myths that pervade gyms, pools and exercise classes. Arm yourself with the facts to keep you slim, strong and even smarter.

MYTH: Muscle turns into fat
REALITY: Muscle and fat are two completely different tissues that have different functions, so it's physiologically impossible to turn one into the other. If you stop exercising, your muscles atrophy, so you lose the tone you worked so hard to create. And if you eat more calories than you burn, you'll gain fat. Muscle vs. Fat: Measure What Matters

MYTH: You need to exercise 30 minutes straight to get fit.
REALITY: Three vigorous 10-minute cardio stints offer the same healthy payback as a single 30-minute one. If you are trying to peel off pounds, of course, the more you do, the faster you'll succeed. But don't feel guilty if all you can squeeze in is a few minutes here and a few minutes there—it all adds up. Vigorous Exercise Gaining More Recognition For Long-Term Weight Loss?

Short on time? Ratchet up the intensity of your workout: Go hard for 30 seconds on the elliptical or jog for a minute in the middle of your walk to maintain your fitness level and your habit. And remember, anything you do—whether it's a brisk 5-minute walk or carrying heavy groceries to your car—for any period of time, provides some benefit.

MYTH: Overweight people have a sluggish metabolism.
REALITY: Though some folks do have metabolic disorders that slow their metabolism, fewer than 10 percent of overweight people suffer from them. In fact, the more you weigh, the more calories you'll burn during exercise at the same relative workload as a slimmer person. If you notice the scale climbing higher, worry about your activity level, not your metabolism. The Fat Burning Zone: Fact or Fiction?

MYTH: Lifting heavy weights make women bulk up.
REALITY: Women don’t have enough of the muscle-building hormone testosterone to get bulky, even using heavy weights. The truth is, some people will gain muscle faster than they lose fat, so they may look bigger until they shed some of the flab and reveal the slim, toned muscles underneath. Weight Training To Maximize Your Workout

MYTH: Stretching before exercise prevents injuries and enhances performance.
REALITY: Researchers are still scratching their head over this one, since studies have yet to show conclusively that limbering up has any effect on staving off strains and other injuries. But they do know that stretching regularly can make bending, reaching, twisting and lifting easier. Best move: Save your stretching for post-exercise, when muscles are warm. Does Stretching Prevent Injury?

MYTH: You burn more calories exercising in chilly weather.
REALITY: If you shiver through a long run in the frigid winter air simply to experience the extra calorie burn, you might want to come in from the cold: You do torch a few extra calories during the first few minutes, but once you get warmed up, the caloric expenditure is the same whether you’re exercising in Siberia or the Sahara. Try a treadmill circuit workout with a great playlist to keep you going! How Many Calories Do You Burn?

MYTH: When your body gets used to an exercise, you'll burn fewer calories doing it.
REALITY: Unless you've adjusted the intensity, you'll burn as much jogging or cycling today as you did last week, last month, even last year. Experts say that this principle only applies to exercises that we're naturally inefficient at, such as using the elliptical machine: After five to six sessions, you'll be smoother in your movements and expend fewer calories—but the difference is only about 2 to 5 percent.

MYTH: The calorie readout on machines is accurate.
REALITY: If only! Research has shown that some types of machines can be off by as much as 70 percent. The culprit? Contraptions such as the elliptical machine haven’t been around long enough for exercise scientists to develop the appropriate calorie-burn equations. On the upside, stationary bikes and treadmills, the grandfathers of the gym, generally give a fairly precise reading, particularly if you enter your age and weight. Calories Burned Calculators

Rather than swearing by what the machine says, use the calorie readout to monitor your progress. If the tally climbs during the same workout for the same duration, you’re working harder and getting fitter. An online calorie calculator can give you a sense of which activities burn the most.

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