With reference to the above video, below are the three main phases of the place or conversion kick in rugby league along with the biomechanics of each phase.
1. Initial address to the ball
This phase of the place kick refers to the kicker measuring out their kicking routine to maintain consistency and enhance accuracy. During the run-up, it is vital that the players support foot (the foot that is planted beside the ball) arrives at the tee at the optimal distance and angle that will allow for greater range of motion to build velocity and ultimately, maximize force imparted on the ball by the inner foot. It is important that the kicker maintains an extended gaze on the ball pre and during the approach to the tee, to ensure the target approach is accurate and gives a greater chance of maintaining correct angles (the optimal run-up angle is said to be 45 degrees to the players non-kicking leg). Step size must be as identical as possible each time a player is marking out in order to maintain consistency and optimize accuracy.
2.Planting of the support leg beside the ball:
The second phase of the place kick is where the kicker maintains balance and control by planting the support leg in the optimal position alongside the ball. Postural support has a direct positive correlation with ball velocity and therefore is an important factor to consider in this phase. The more balance a kicker has upon planting their foot alongside the ball, the greater control they have which tends to result in greater velocity leading to a better kicking accuracy.
http://lermagazine.com/article/kicking-biomechanics-importance-of-balance
The second phase of the place kick is where the kicker maintains balance and control by planting the support leg in the optimal position alongside the ball. Postural support has a direct positive correlation with ball velocity and therefore is an important factor to consider in this phase. The more balance a kicker has upon planting their foot alongside the ball, the greater control they have which tends to result in greater velocity leading to a better kicking accuracy.
http://lermagazine.com/article/kicking-biomechanics-importance-of-balance
3. Striking of the ball with the instep of the kicking foot
The final phase of the place kick is where weight is transferred and the kickers lower extremities are used to generate force and impart angular velocity on the stationary, angled ball. The non-kicking leg is used to create a stable base of support to ensure the foot comes into contact with the sweet sport location on the ball. It is important that segments of the body rotate from proximal to distal (kinematic) to maximise foot speed in order to reach maximal velocity at foot impact. The speed of the foot at contact is said to be the key factor in successful kicking.
http://www.rugby.com.au/Portals/18/Files/Coaching/Level3Papers/Kicking_-_Ian_Fowler_2005.pdf
The final phase of the place kick is where weight is transferred and the kickers lower extremities are used to generate force and impart angular velocity on the stationary, angled ball. The non-kicking leg is used to create a stable base of support to ensure the foot comes into contact with the sweet sport location on the ball. It is important that segments of the body rotate from proximal to distal (kinematic) to maximise foot speed in order to reach maximal velocity at foot impact. The speed of the foot at contact is said to be the key factor in successful kicking.
http://www.rugby.com.au/Portals/18/Files/Coaching/Level3Papers/Kicking_-_Ian_Fowler_2005.pdf
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