Good article on runnersworld .. the perfect form

http://www.runnersworld.com/article/0,7120,s6-238-267-268-8210-0,00.html


This is an excerpt from the article, which I need to take note on

Legs/Stride While sprinters need to lift their knees high to achieve maximum leg power, distance runners don't need such an exaggerated knee lift--it's simply too hard to sustain for any length of time. Instead, efficient endurance running requires just a slight knee lift, a quick leg turnover, and a short stride. Together, these will facilitate fluid forward movement instead of diverting (and wasting) energy. When running with the proper stride length, your feet should land directly underneath your body. As your foot strikes the ground, your knee should be slightly flexed so that it can bend naturally on impact. If your lower leg (below the knee) extends out in front of your body, your stride is too long.

Ankles/Feet To run well, you need to push off the ground with maximum force. With each step, your foot should hit the ground lightly--landing between your heel and midfoot--then quickly roll forward. Keep your ankle flexed as your foot rolls forward to create more force for push-off. As you roll onto your toes, try to spring off the ground. You should feel your calf muscles propelling you forward on each step. Your feet should not slap loudly as they hit the ground. Good running is springy and quiet.