Feeling faint? Cross your ankles. Squeeze your knees. Grip a ball. Simple muscle-tensing exercises like these can keep you from passing out, say researchers who did a scientific study of the problem.

Picture this: you’re standing in line at the grocery store when suddenly you feel dizzy, nauseous, and before you know it, you’re waking up on the floor with concerned strangers hovering over you. If ...

Over one million Americans faint every year, and countless more do worldwide. Fear, pain, the sight of blood or prolonged standing – think the long lines of summer travel – can trigger fainting. These ...