by David Miner
Free diving, like many sports, requires a certain amount of mental and physical fitness. Free diving requires athletic fitness so that you can power yourself through the water efficiently. Moving through a liquid environment requires strength and good cardiovascular fitness. Free diving also requires good mental fitness. Descending below the surface, holding your breath, and diving deep requires a balanced and controlled mental fitness. Fifty feet underwater, holding your breath is no place to become mentally unstable.