2012年7月20日星期五

Cheap Oakley average referenced value of this angle

Bio-mechanicsFor reasons having to do with pregnancy, women are proportionately wider in the pelvis than men. The angle formed by the line extending from the hip to the center of the knee (patella) and the line that goes from the center of the knee to the tibia, is called the quadriceps angle or Q angle. In literature, the Cheap Oakley average referenced value of this angle is 11 degrees for males and 14 degrees for females.The relationship between the pelvis and knee in women, causes differences in sport bio-mechanics, as women tend to attack the ground with the foot more rotated to the outside, resulting in a more intense internal rotation. This increased unstable Cheap christian louboutin pronation could increase the risk of injuries. Some manufacturers have Cheap Oakley Sunglasses this bio-mechanic differences into account. The main implications for the design of the footwear include dual-density unit, a more rounded heel and absorbing viscous-elastic material placed in order to delay the initial rotation of female feet after the initial contact with the soil.The cycle of ovulationIn addition to structural and anatomical differences between Cheap Oakley Sunglass the two sexes, there are also hormonal differences. Intuitively, many women athletes have some sports injuries associated with their periods of fertility.In late 2000, researchers showed that during the peak presence of estrogen in the body (which functions as a muscle relaxant), the plantar fascia is affected, becoming more elastic, thus influencing the bio-mechanical behavior called "Windlass mechanism". The arch of the foot flattens and the rate of medium-lateral knee acceleration increases, a factor that some researchers suspect to be associated with the appearance of certain lesions.Given these cyclical bio-mechanical changes, some manufacturers of athletic footwear launched models with deformable materials used on the medial side, which allow accommodating the anatomical differences of the plantar arch caused by these cycles. Additionally, some female role models have a ratio between the heel and forefoot higher (greater wedge), reducing the likelihood of developing certain lesions that are suspected to be associated with the rotation of the knees.

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