Joe Wilkes

1. You can turn fat into muscle. This is completely false. Muscle and fat are two entirely different substances. Muscle is a fibrous, contractible tissue that can only be built through exercise—via a break-down-and-rebuild process. Fat is adipose tissue that can be converted into energy in the service of building muscle, but the tissue itself can't be transformed into muscle tissue. So if you are an out-of-shape 200 pounds, you're not going to look like a young Schwarzenegger just by lifting weights. You'll have to do a lot of INSANITY®-style cardio to burn the fat off before anyone can see how ripped you've gotten. Which leads us to . . .
2. You can turn a pot belly into a six-pack just by doing crunches. Any insomniac has seen those late-night commercials that guarantee miracles with rollers, chairs, crunchers, and various other contraptions. They all promise a Brad Pitt six-pack in just minutes a day. But if you're starting with a Homer Simpson beer gut, it's going to take more than rocking back and forth a few minutes in a modified lawn chair every day to see any results. No matter how steely your ab muscles are, if they're covered in inches of fat, no one is going to be able to appreciate them.
3. You can lose weight just by dieting. This is technically true. If you don't eat or eat less, you will lose weight—initially. But you will plateau quickly, and your body will readjust its metabolism to survive on fewer calories, making it even more difficult to lose weight. If you really want to move the needle on the bathroom scale in a meaningful way, it's going to take diet and exercise. Even light to moderate levels of exercise on a regular basis help a lot. Physical activity not only burns calories, it also helps build muscle and increase your metabolism, both of which turn your body into a more efficient calorie-burning machine, even while at rest. Plus, there are numerous other health benefits, from cardiovascular improvement to mood elevation. And in-shape people look a lot hotter than sallow, starved people do.


6. More sweat, more weight loss. Most good workouts will make you sweat, but the amount you sweat isn't necessarily the test of a good workout. Everyone sweats differently. And all sweat does is cool your body off with water. What you get from sweating isn't fat dripping off your body. If it were, you'd be leaving a big oil stain on the floor after you worked out. Sweating just causes you to lose water weight. It's the activity itself that causes your body to burn stored fat for energy.

8. The best time to exercise is in the morning. A lot of people find that they prefer getting their workout out of the way first thing in the morning, and often feel that it gives them an energy boost for the rest of the day. But a good workout any time of day is just as good for you, although you may not get the best results if you're overly tired. So if you're someone who likes to burn the midnight oil, you can burn fat just as effectively then as you can at sunrise.

10. Swimming is effective for weight loss. This is another half-truth. Swimming is great for building lean muscle and increasing cardiovascular endurance, which do lead to weight loss. But because the water supports so much of your body weight, swimming has been found to be less effective than land-based aerobic activity for weight loss, since the effort it takes to haul your carcass around does a lot more for fat burning. Swimming's still a great thing to add to your fitness regimen though. Having a variety of exercises, like P90X® and INSANITY®, will decrease your boredom and increase your overall results.