Stretching helps prevent soreness after exercise.
False. There are good reasons to include stretching in your exercise routine, but preventing post-workout soreness doesn't seem to be one of them. A recent review of 10 studies found that stretching, either before or after exercise, has little or no effect on muscle soreness half a day to three days later. The results were convincingly consistent across the studies. But because all of the participants were healthy young adults, these findings still need to be confirmed with other groups.

Even though stretching may not ward off morning-after soreness, it's still recommended for other reasons. Stretching improves flexibility, and better flexibility helps prevent injuries. Some people notice that stretching enhances sports performance, while others find that doing slow, gentle stretches promotes a sense of relaxation and well-being.

The best way to stop a nosebleed is to tilt your head back.
False. A head-back position just makes blood run down into your throat, which can cause coughing or gagging. If enough blood is swallowed, it may even lead to vomiting. Instead, sit down and lean forward slightly. Pinch your nose just below the bony ridge with your thumb and index finger. While breathing through your mouth, continue pinching for five to 10 minutes.

Once the bleeding stops, avoid doing anything that might start it again, such as blowing your nose or bending over. Most nosebleeds originate in the front part of the nose and stop within a few minutes. However, some begin in the large blood vessels deeper inside the nose, often as a result of high blood pressure or atherosclerosis (hardening of the arteries).

These nosebleeds can be serious, so see a doctor if the bleeding doesn't stop within 15 minutes. Also get medical help if your nosebleed occurs after an injury, including a punch or bump to the face that might have broken your nose.

An adult can get 100% of the Daily Value (DV) for calcium and still fall short of the recommended intake.
True. The disconnect is a fluke in the way the calcium DV is calculated. The DV for calcium on food labels is based on a recommended intake of 1,000 mg daily. That's the right amount for adults ages 19-49. However, adults over 50 are advised to get 1,200 mg daily, so they actually need to consume 120% of the DV.

An easy way to tell at a glance how many milligrams of calcium a food serving contains is to simply add a zero to the % DV. For instance, if a serving delivers 25% of the DV, it contains 250 mg of calcium.