Not if you can't keep your eyes open! The best time to exercise is when it suits you best.

If you're not a morning person, don't even think about exercising in the morning - you'll most likely fall off your bike or trip up on your shoelace or forget where it was you were supposed to jog to. The same thing goes for people who don't have time in the afternoon or who are completely drained by nightfall; exercise when you can, not when you think you should. There is no "best time" and no specific time when your body will burn fat more effectively.

Bottom line: The best time to exercise is the time you exercise best.

Think Madonna has a middle-aged paunch under that leather jacket? Of course not! Yet she pumps iron as part of her daily fitness routines.

Many women are afraid that picking up a set of weights will cause them to bulk up, and so they argue that cardio workouts will do the trick. But this is a falsehood because testosterone plays a large part in creating larger muscles and women simply don't produce enough of it to gain bulk when lifting weights. Toned definition in the arms and legs is far more likely to be the outcome of some weight training if you're female.

Men, on the other hand, often lift weights to bulk up but avoid cardio workouts like the plague. Men need to recognize that their weight training regime will only be boosted if they add some cardio.

Bottom line: Adding weights to your workout won't make you gain bulk. In fact, it will increase your fitness, boost your results, and rev up your metabolism.

How many times have you heard this simple but worn-out phrase ... and believed it? Pain is your body's way of telling you that you're doing it harm, so don't ignore it! Constantly pushing through that pain can only result in injury. A little bit of discomfort is fine, but any more than that and you should listen to your body - not the voice in your head saying "no pain, no gain".

Bottom line: When you feel pain, immediately stop. When you feel a slight burn, keep on truckin'!