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Three dimensional musculoskeletal modelling of the abdominal crunch resistance training exercise
The aim of this study was to evaluate the benefits and limitations of using three dimensional (3D) musculoskeletal modelling (LifeModeler TM ) in assessing the safety and efficacy of exercising on an abdominal crunch resistance training machine. Three anthropometric cases were studied, representing...
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Published in: | Journal of sports sciences 2013-02, Vol.31 (3), p.264-275 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | The aim of this study was to evaluate the benefits and limitations of using three dimensional (3D) musculoskeletal modelling (LifeModeler
TM
) in assessing the safety and efficacy of exercising on an abdominal crunch resistance training machine. Three anthropometric cases were studied, representing a 5
th
percentile female, and 50
th
percentile and 95
th
percentile male. Results indicated that the LifeModeler
TM
default model was capable of solving the forward dynamics simulations without adjustments. The modelling was able to indicate high risk for back injury when performing the abdominal crunch exercise as a result of the unacceptable intervertebral joint loading that occurs during the exercise. Individuals with small anthropometric dimensions such as some females and children cannot be accommodated suitably on the abdominal crunch machine which negatively impacts exercise posture and technique. Hip flexor muscle contribution in the execution of the exercise for the 5
th
percentile female was substantial thus reducing the efficacy of the exercise in isolating the abdominal muscles. |
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ISSN: | 0264-0414 1466-447X |
DOI: | 10.1080/02640414.2012.729077 |