Biomechanics

FACULTY OF SPORTS SCIENCE AND COACHING BIOMECHANICS QSU3063 MINI PROJECT : FAST BOWLING IN CRICKET LAB: B GROUP : 7 PREPARED BY KISHANDHARAN GOPAL

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MOHD FADHZIL BIN MD IDRIS D20121059146 MOHAMAD ZAIHAN BIN ARIFFIN

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INTRODUCTION The purpose of this study is to show there are ten phases in cricket

fast bowling skill. The aim of fast bowling is to bowl cricket ball at high speed. Bowling can be divide into 3 skills which is side on, front on, semi front on and mixed action. In any three skills, there are seven phases which are divided into run-up, pre-delivery stride, mid bound, back foot contact, front foot contact, ball release and follow through. Fast bowling in cricket is a highly dynamic skills which requires the players to generate ball velocities. Side on and front on skill is the most popular skills in bowlers because the technique have less injury risk of injury compare to mixed action.

Phases in Bowling Skills

Run Up

Run up is the phase where bowler makes when preparing to

deliver the ball. Run up length is usually around 15m to 30m. The purpose of run up is to add speed during ball releasing stage. In the video that we analysed, the bowler run up to 10m for the run up stage.

Video Analysis

Pre Delivery Stride

Known as the phase between the end of run up and the

moment bowler make foot impact to start the delivery stride phase. Normally bowler will run 15 to 30m to make a perfect pre delivery stride and the speed is around 4.0 to 6.0 m/s. In this stage, the chest of bowler have low, short bound so that they won’t lose their momentum. We can also see their leg are start to open up wider.

Jump

After the pre-delivery stride, bowler had start to jump on

air. In this stage, bowler already have a lot of speed and power to release the ball. We can also see that bowler’s body start to lean backward.

Delivery Stride

This is the stage where delivery swing is made, whether

the ball is release or not. At this stage, the bowler’s weight is distributed on the back foot with the momentum of the body leaning away. The momentum of the body leaning away is important to keep bowler from miss step or collapse.

Mid Bound

•M I D B O U N D I S T H E P O S I T I O N W H E R E B O W L E R H A V E

TO OPEN UP HIS LEG AND BODY BEND TO BACKWARD WITH ELBOW FLEX AROUND 45 DEGREE. •T H I S A C T I O N I S W R O N G A C C O R D I N G T O T H E JOURNAL THAT WE FOUND BECAUSE IN MID BOUND ACTION BOTH LEG SHOULD BE ON THE GROUND WITH FLEX ELBOW. •B U T I N T H I S P I C T U R E , O N L Y L E F T F O O T W A S CONTACTED WITH THE GROUND.

Back Foot Contact

This action is the acton after mid bound where bowler have

to make contact of his back foot on the ground. Back foot conlands on the groundtact is position of the bowler at the instant when the back foot . According journal, when the back foor contacted with the ground, front leg should be around 90 degree rised so that total power can be transfer to back leg.

Left Arm Rotation

The purpose of arm rotation in bowling is to bowl the

cricket ball with rapid rotation so that when it bounce on the pitch it will deviate from its normal straight path. This action will make batsman difficult to target where the ball will land. Thus, for amatuer bowlers, straight left arm rotation is important to keep the ball straightfrom being wide.

Front Foot Contact

This movement involves the contact of front foot with the ground. Front foot contact is the position of the bowler at the moment when the

front foot hits the ground just prior to delivering the ball The front leg should be slightly flexed because bowler with straight or hyper extended leg can lead to greater ball release speed.

Ball Release

This action is where bowler release ball to batter. During this action, bowler have to raise the hand

straight to the air so that the power of release can be raise during releasing the ball which involve pelvis, thirax and wrist. If the bowler din’t raise his hand straight to air, this will effect the speed of ball release directly.

Follow Through

This action defined as period where ball released and the stride that

taken by bowler. Follow through doesn’t effects the speed of ball but can prevent injuries to bowler. The normal length of follow through is around 7 to 10 steps according to the bowler’s comfortable.

Conclusion As a conclusion, the most ideal skill that a bowler

can use for bowling cricket ball is by using side on or front on skill to prevent injuries. Also, all the phases that we shown should be practice in order to make a good bowling skill in cricket.