Walk 100 yards, then jog 100 yards, etc., and keep alternating for the first few days. Then increase the jogging to 200 yards, and soon you can jog a block/walk a block, without becoming breathless. Before you know it, you're on your way to increased fitness. If you can't 'light jog', then fast walk with deep breathing and swinging arms.

These exercises use all 640 muscles and were designed by Paul C. Bragg and his daughter, Patricia.

• Standing exercises
• Sitting exercises
• Supine exercises