You think you’re too tired to exercise.
Your back, knees, shoulders, neck, or hips hurt.
It hurts when you stand.
It hurts when you sit.
You’d like to be stronger.
You’d like to be more flexible.
You want to golf, swim, skate, walk, bicycle or run better.
You like to exercise with lots of props and equipment.
You like to exercise with a minimum of props and equipment.