Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/16511
Title: Effects of squat lift training and free weight muscle training on maximum lifting load and isokinetic peak torque of young adults without impairments
Authors: Yeung, SSM 
Ng, GYF 
Keywords: Back
Functional training and activities
Muscle performance, general
Specificity of training
Issue Date: 2000
Publisher: Oxford University Press
Source: Physical therapy, 2000, v. 80, no. 6, p. 570-577 How to cite?
Journal: Physical therapy 
Abstract: Background and Purpose. Manual lifting is a frequent cause of back injury, and there is no evidence as to which training mode can provide the best training effect for lifting performance and muscle force. The purpose of this study was to examine the effects of a squat lift training and a free weight muscle training program on the maximum lifting load and isokinetic peak torque in subjects without known neuromuscular or musculoskeletal impairments. Subjects. Thirty-six adults (20 male, 16 female) without known neuromuscular or musculoskeletal impairments participated. The subjects' mean age was 21.25 years (SD=1.16, range=20-24). Methods. Subjects were divided into 3 groups. Subjects in group 1 (n=12) performed squat lift training. Subjects in group 2 (n=12) participated in free weight resistance training of their shoulder abductors, elbow flexors, knee extensors and trunk extensors. Subjects in group 3 (n=12) served as controls. The maximum lifting load and isokinetic peak torques of the trunk extensors, knee extensors, elbow flexors, and shoulder abductors of each subject were measured before and after the study. Training was conducted on alternate days for 4 weeks, with an initial load of 80% of each subject's maximum capacity and with the load increased by 5% weekly. Results. All groups were comparable for all measured variables before the study. After 4 weeks, subjects in groups 1 and 2 demonstrated more improvement in maximum lifting load and isokinetic peak torque of the back extensors compared with the subjects in group 3, but the 2 training groups were not different. Conclusion and Discussion. The findings demonstrate that both squat lift and free weight resistance training are equally effective in improving the lifting load and isokinetic back extension performance of individuals without impairments.
URI: http://hdl.handle.net/10397/16511
ISSN: 0031-9023
EISSN: 1538-6724
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