The associations between fast bowling technique and ball release speed: A pilot study of the within-bowler and between-bowler approaches |
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Authors: | Craig W Salter Peter J Sinclair Marc R Portus |
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Institution: | 1. School of Exercise and Sports Science, The University of Sydney , Lidcombe, NSW;2. Biomechanics Department , Australian Institute of Sport , Bruce, ACT, Australia craig.salter@hotmail.com;4. Biomechanics Department , Australian Institute of Sport , Bruce, ACT, Australia |
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Abstract: | Abstract The inability of the between-bowlers methodology to control parameters external to technique could lead to erroneous significant and non-significant associations being reported between fast-bowling technique and ball release speed. Using Pearson's product – moment correlation, we first examined the effectiveness of a within-bowler methodology to identify associations between technique and ball release speed of an elite semi-open fast bowler over 20 deliveries. These results were compared with associations identified from a between-bowlers methodology in which 20 single-performance trials bowled by elite fast bowlers adopting a semi-open shoulder alignment were collated. Sufficient variation was observed in within-bowler ball release speed to allow f relationships to be identified between technique and ball release speed. Although greater variation in bowling technique parameters was observed in the between-bowlers methodology, no associations were identified between technique and ball release speed. Multiple stepwise regression analysis showed that 87.5% of the within-bowler variation in ball release speed can be attributed to run-up velocity, angular velocity of the bowling arm, vertical velocity of the non-bowling arm, and stride length. The within-bowler methodology provided significant detailed information about the individual bowler that the between-bowlers methodology overlooked, forming the basis of a performance enhancement programme. It is recommended that within-bowler methodology be used in future investigation of technique relationships. |
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Keywords: | Biomechanics cricket fast-bowling kinematics methodology within-subject |
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