Some notes on form:
- Land on your forefeet or midfeet (balls of your feet) instead of your heels. Too much on your forefeet can make your calves sore. If you feel yourself landing on your heels, shorten your stride.
- Strides should be short — don’t extend your legs as far as you do with shoes. It should feel almost like you’re running in place.
- Keep upright and balanced. Keep your feet under your hips and shoulders.
- Stay light. You should feel like you’re light on your feet, not pounding at all. Barefoot runners tend to be a little more springy in their step.
- Run quietly. If you are making a lot of noise with your steps (as shoe-wearing runners do), you’re pounding too hard. Try to run softly, quietly, like an animal.
Source: http://zenhabits.net/barefoot-running/
