Introduction The instep kick is an important skill in the sport because it happens numerous times throughout the game. From long passes, a goal kick, free kick, clearance kick, and shooting to score a goal, is dependent on the mastering of instep kick technique. Mastering this technique increases accuracy, gives players a better chance of scoring and ultimately winning. The accuracy and the distance the ball travels is influenced by angular velocity. During an instep kick angular velocity is maximized first by the tight then by the shank and finally the foot. Angular velocity is the rate of angular position or orientation in line segment. A goniometer is used to measure segment angles and joint angles usually in static position but in
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The antagonist and agonist muscles work in opposite directions of joint to help produce this movement and requires segmental and joint rotation in multiple planes. In order to generate linear at the foot, a skilled kicker will first rotate hip backwards into extension and flex the knee during backswing phase of the kick. As the hip begins to flex, the knee continues to flex then is held in this position for a short period of time as hip continues to flex. The knee begins to extend and before hip achieves maximal angular velocity, its velocity begins to decline, the knee velocity increases until impact with the soccer ball (Aderson and Sidaway, …show more content…
The formula for linear velocity is radius time angular velocity. An important concept is that angular velocity stays the same in all body parts but differ in linear velocity at the end of the implement. The longer the radius the higher linear velocity at the end of the implement. Height and size of limbs also plays a factor, for example a taller person has longer limbs and have the advantage in linear velocity on a short stature person. The disadvantages are that they require more energy and injuries are more severe at the end of extremities than a shorter person because linear velocity is the highest at these points. The radius would be the kicking leg with emphasis on the foot since it’s the one at the end of implement, which makes contact with soccer ball. Ball speed depends on the velocity of the foot upon impact as well as the quality of ball-foot impact (Kellis and Katis,
The antagonist and agonist muscles work in opposite directions of joint to help produce this movement and requires segmental and joint rotation in multiple planes. In order to generate linear at the foot, a skilled kicker will first rotate hip backwards into extension and flex the knee during backswing phase of the kick. As the hip begins to flex, the knee continues to flex then is held in this position for a short period of time as hip continues to flex. The knee begins to extend and before hip achieves maximal angular velocity, its velocity begins to decline, the knee velocity increases until impact with the soccer ball (Aderson and Sidaway, …show more content…
The formula for linear velocity is radius time angular velocity. An important concept is that angular velocity stays the same in all body parts but differ in linear velocity at the end of the implement. The longer the radius the higher linear velocity at the end of the implement. Height and size of limbs also plays a factor, for example a taller person has longer limbs and have the advantage in linear velocity on a short stature person. The disadvantages are that they require more energy and injuries are more severe at the end of extremities than a shorter person because linear velocity is the highest at these points. The radius would be the kicking leg with emphasis on the foot since it’s the one at the end of implement, which makes contact with soccer ball. Ball speed depends on the velocity of the foot upon impact as well as the quality of ball-foot impact (Kellis and Katis,