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LITTLE ROCK, Ark. (KTHV) -- THV 11 is working for you on this Medical Monday. Here are 5 health rules you can break from Yahoo! Health.

Myth 1 - You'll get arthritis if you crack your knuckles. It may be annoying, but no medical studies prove cracking or popping your fingers will lead to arthritis. However, some doctors say cracking your knuckles repeatedly may hurt your fingers in other ways so it's best to avoid the habit.

Myth 2 - Going outside with wet hair. It may make you feel chilly, but it won't make you sick. Colds are caused by a virus that is usually spread by droplets from someone's cough or sneeze.

Myth 3 - Don't swim after you eat. There's no evidence that this causes cramps, which could possibly lead to drowning. While it's true that eating diverts some blood to the digestive system, most experts agree your body can still provide enough blood and oxygen during exercise to keep cramps from happening.

Myth 4 - Drink 8 cups of water a day. As long as you're drinking enough so that you don't feel thirsty, you urinate often, and your urine is nearly colorless, you're probably getting enough water.

Myth 5 - The "five second rule." We've all heard this one when someone scoops food off the floor, as if germs stand by with a stopwatch to wait to latch onto food. Research proves that food dropped on carpet attracted fewer germs than if dropped on a hard surface.

Myth 6 - Avoid reading in dim light. Experts say poor lighting will not cause permanent damage to your eyes. Same thing goes for sitting too close to the television or computer screen.

Myth 7 - Sugar makes kids hyper. Research has found that neither table sugar nor aspartame negatively affected children's behavior. But, other research has confirmed these findings. What is known for sure is too much sugar will cause teeth problems.

Myth 8 - "Feed a cold, starve a fever". This is an old wives tale. When it comes to illness, drinking plenty of fluids is key to a quick recovery. As a general rule, if you're hungry, that's your body's way of telling you it needs nutrition.

Myth 9 - Drinking caffeine will dehydrate you. A 2002 study from the University of Connecticut has confirmed that this isn't true.

Myth 10 - Get eight hours of sleep a night. Not everyone needs this amount of sleep. Some run fine on six while others barely function with nine. The amount of sleep you need varies on factors like illness, stress, physical activity, etc.

Myth 11 - Warm milk will help you sleep. Yes, milk contains tryptophan, the same sedative found in turkey, but not near enough to help you fall asleep.

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