The team from the University of South Australia presented a study of the biomechanical effects of three shoes are commonly used in cricket fast bowlers and the Australasian Podiatry Conference in Melbourne today.
Chief Scientist, Masters student Chris Bishop Sansom Institute for Medical Research, says the huge forces of fast bowler in the legs and lower body will create damage.
"With three different bowling forces acting on the front foot and back and the extent of these differences between the feet," he said.
"The main forces are the vertical forces, which are weak leg up and can be anything from five to nine times the body weight, so they really are very large forces.
"The braking forces may be close to two to four times the body weight."
Mr. Bishop, a consultant podiatrist Cricket Association of South Australia, says the forces are larger than the front foot hits the ground.
"There is great strength in the leg before the initial contact. This force must be absorbed somewhere in the natural buffers [leg], which may be by movement of the ankle joint or bend the knee," said .keen sandals for women
Stress fractures of the tibia are another common misconception, "says Dr. Dominic Thewlis, who co-authored the research that is being prepared for submission to peer-reviewed Journal.
"[What happens] when you load a bone repeatedly with a heavy load, because these fast bowlers do during periods of activity and test match cricket in particular is that it is in fact not enough bone to recover properly, "said he said.
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For the study, the authors compared two models of shoes cricket against best-selling footwear changed.
shoes changed that fast bowlers are often spent on a running shoe or cross trainer rigid, strong only on the sole.
Mr. Bishop said Bowling change shoes in this way partly for reasons of fashion and partly because of the perceived benefits of comfort and performance.
"These shoes were made specifically for the demands of cricket and when you change a standard cross-trainer, you can actually change the structural properties of shoes," he said.
Change the characteristics of the shoe, the researchers found some evidence of shock-absorbing ability of athletes to reduce the foot, the shock moves through the hip knee and lower back.
During the test shoes on the Australian Institute of Sport, threw four fast bowling three overs each, carrying a second pair of shoes for each series of six balls.
Bowlers' techniques and the forces of the system studied in 20 cameras and force platforms to measure both the leg and the back heel of the leg.
"The biggest thing we see in our results is the effect of shoes on the front knee," said the bishop.
"We see that the shoes custom modification appear to increase the external rotation moment that we believe could be a mechanism of injury.
"If it is a predictor of injury in cricket is yet to be determined, but it has certainly provided additional information on a mechanism of injury that should be studied further.
"We must be careful with the data we have, because it is a very small sample, but the change may actually hinder performance customized shoes.
"But we have some preliminary data to show that this process can cause changes that can cause injury."
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