There are three basic levels to fitness. Most people aren’t even on Level One. They are on Level Zero. They do zero. Seventy-eight percent of adults do not do enough exercise to qualify as preventive health maintenance.
There is Level One, which is the level where people work out to avoid premature death. This is the very basic twenty minutes three times a week of cardio at 60% to 80% of maximum heart rate. Walking on a treadmill or pedaling a stationary bike while listening to your iPod, watching TV or reading are preferred choices. People on Level One will occasionally think about taking the stairs instead of the elevator. People at this level may or may not be in good-looking shape but nobody’s laughing either. If they do look really good, they can probably thank genetics. They are comfortably staying alive.