Document Detail

Ground reaction force comparison of bilateral symmetry with pneumatic resistance squat device and free weights - biomed 2009.
MedLine Citation:
PMID:  19369799     Owner:  NLM     Status:  In-Data-Review    
METHODS: Four previously trained men (mean +/- SD; age = 20+/-2 years, body mass = 99+/-18 kg) performed three sets of three repetitions of maximal exertion squat exercises with pneumatically controlled constant resistance and free weights each with a resistance level set to half of the body weight of each subject. Unilateral GRF data for each lifting modality at the negative to positive transition of the squat exercise was measured with a force plate under each foot.
RESULTS: The pneumatic resistance GRF (N; mean +/- SD) was 749+/-114 on the left leg and 786+/-123 on the right leg and the free weight GRF was 786+/-114 left and 861+/-111 right resulting in a 5% difference between left and right GRF with pneumatics and 9% difference with free weights. The correlation coefficient between left and right GRF was 0.92 with pneumatics and 0.80 with free weights.
CONCLUSION: Because the pneumatic device elicited more bilaterally symmetric GRF than traditional free weights, the separate resistance cylinders are an acceptable design configuration.
David C Paulus; Brian K Schilling
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Biomedical sciences instrumentation     Volume:  45     ISSN:  0067-8856     ISO Abbreviation:  Biomed Sci Instrum     Publication Date:  2009  
Date Detail:
Created Date:  2009-04-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0140524     Medline TA:  Biomed Sci Instrum     Country:  United States    
Other Details:
Languages:  eng     Pagination:  419-23     Citation Subset:  IM    
University of Arkansas - Fort Smith, Fort Smith, AR.
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