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J Sports Sci. 2016 Oct;34(20):1970-5. doi: 10.1080/02640414.2016.1149600. Epub 2016 Mar 1.

Multi-segment trunk models used to investigate the crunch factor in golf and their relationship with selected swing and launch parameters.

Author information

1
a School of Health Sciences , The University of Notre Dame Australia , Fremantle , Western Australia , Australia.
2
b Institute for Health Research , The University of Notre Dame Australia , Fremantle , Western Australia , Australia.
3
c Department of Exercise and Sports Sciences , East Tennessee State University , Johnson City , TN , USA.
4
d School of Exercise and Health Sciences , Edith Cowan University , Joondalup , Western Australia , Australia.

Abstract

The use of multi-segment trunk models to investigate the crunch factor in golf may be warranted. The first aim of the study was to investigate the relationship between the trunk and lower trunk for crunch factor-related variables (trunk lateral bending and trunk axial rotation velocity). The second aim was to determine the level of association between crunch factor-related variables with swing (clubhead velocity) and launch (launch angle). Thirty-five high-level amateur male golfers (Mean ± SD: age = 23.8 ± 2.1 years, registered golfing handicap = 5 ± 1.9) without low back pain had kinematic data collected from their golf swing using a 10-camera motion analysis system operating at 500 Hz. Clubhead velocity and launch angle were collected using a validated real-time launch monitor. A positive relationship was found between the trunk and lower trunk for axial rotation velocity (r(35) = .47, P < .01). Cross-correlation analysis revealed a strong coupling relationship for the crunch factor (R(2) = 0.98) between the trunk and lower trunk. Using generalised linear model analysis, it was evident that faster clubhead velocities and lower launch angles of the golf ball were related to reduced lateral bending of the lower trunk.

KEYWORDS:

3D; Golf; clubhead velocity; crunch factor; launch angle

PMID:
26930121
DOI:
10.1080/02640414.2016.1149600
[Indexed for MEDLINE]

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