2.2 & 2.3 assessments due friday week 10 3:00pm

2.2 Paragraph sentence starters

I noticed from my (testing/ images/ feedback)

The biomechanical principles that relate are (At least two biomechanical principles)

I/ They need to...(Explain exactly what you need to do in relation to the biomechanical principle)

The reason why (Why is this principle important in improving your %'s)...

The drill that I used to improve this was...(What type of practice does this fit into, why was it used?)

I noticed from my testing that when I was serving in volleball the ball was not going over the net because I was serving it too flat. The biomechanical principles that relate are projectile motion and force summation. The first focus point is about projectile motion for my overarm volleyball serve. You need to have all three parts to projectile motion in order to have a strong serve that goes over the net. You need to serve the ball with your arm fully extended so it is nice and high, apply lots of force to it and also ensure that the angle is not too high or low otherwise it will result in the ball going into the net or over the back of the court. The reason why my serve is improving is because I am now serving the ball with my arm fully extended when I strike the ball and that means that the height the ball is released from is the same as the top of the net which means it spends more time in the air than if I had served from lower giving me more distance. My angle of release is now approximately 20 degrees when serving rather than 10 degress that I had when I first started. this means that the ball still has a slight arc in the parabola which helps to ensure that it clears the net. This also means that it will not go out the back of the court like the ball would if I had an angle of release of say 45 degrees which is more for long distance. Lastly, my speed of release has also increased because my arm is fully extended and I was able to apply more force to the ball to ensure that is could make it over the net. I need to ensure that I hit the ball with my right arm fully extended meaning that my elbow joint is in full extension with the tricep being the agonist and bicep being the antagonist and my shoulder moving from flexion where the deltoid is the agonist and latissimus dorsi the antagonist to extension with the deltiods now becomming the antagoninst and the latissimus dorsi becomming the agonist muscle. I also need to make sure that when I release the ball at contact that the ball is at 20 degrees to ensure that it has enough of an arc to make it over the net before gravity and top spin start to bring the ball down towards the ground. The drill that I used for this was a fixed practice drill where I had to serve the ball against the wall and a mark that I had on the wall that worked out at approximately 20 degrees. I repeated this over a few practice sessions with the serve doing 30 serves with a short reflection in between each serve to ensure that I was making contact with full elbow extension and getting close to my mark on the wall to learn what it feels like to hit the ball at 20 degrees with full elbow extension. I used this type of practice because I was still learning some of the technique points for the overarm serve and having a set drill where I could work on the angle of release repeatedly helped me to develop the motor programme to improve my serve.