Correlation between foot strike and injury of runners

The initial study conducted by the researchers at Harvard University has a finding that there is a correlation between the foot strike and injury that occurs to the runners. The study further revealed that rear foot strikers carry a double risk of repetitive stress injuries and fractures than the forefoot strikers.
A Study
The study was the outcome of the data collected from long distance runners of either sex, who were numbering over fifty. Around 74% of these runners have reported injuries with types of moderate and severe in each year. This was reported by Medicine & Science in Sports & Exercise. While observing the repetitive injuries like, shin splints it was inferred that the rear foot strikers suffer with such injuries by a factor of 2.3 times than the forefoot strikers
Less impact of the body during the forefoot strike
According to Daniel Lieberman, Ph.D., a professor of human evolutionary biology at Harvard, that people more often forget running is a skill and are not aware that improper running will result in injuries. Being an author of an health book, he confirms that forefoot strike cause less impact of force on the body.
Landing of foot is the key
According to Lieberman’s 2010 study, humans runners in the past thousand years have used forefoot landing that has caused no impact on joints and bones. Using the cushioned running shoes, 75 % of people can land with heels first as a matter of comfort. But such landing causes an impact of 3 times of the body weight on the knees as well as legs. The raised heel beds in most of the shoes, automatically prevent the heel landing even for the mid foot strikers though they run with a forefoot strike with standard running shoes.
Lieberman also indicates the forefoot strike is only a component but not a real answer for preventing injuries. He has remarked that complex problems may not have simple solutions and asserts this fact by telling is views that one need not fix the unbroken things.
Lieberman also advises, every injured runners to try and should have different running form. He is cautioning the runners to shift the landing gradually from rearfoot to forefoot, to prevent calf strains and tendonitis.
Test for landing
He suggests the runners to take of their shoes to jog on the hardwood floor to feel the real pain while landing on the heels. By trying on landing on the ball of the foot one can feel the difference.
Rear foot strikers are a larger group. According to him ,by quitening the step, one can take the weight of the back of the foot.

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