Effects of Isometric and Isotonic Training on Skeletal Muscle Hypertrophy PDF Download
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Author: Bob L. Beasley
Publisher:
ISBN:
Category : Isometric exercise
Languages : en
Pages : 242
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Author: Bob L. Beasley
Publisher:
ISBN:
Category : Isometric exercise
Languages : en
Pages : 242
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Author: M. Maxim Asa
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Jürgen Gießing
Publisher: Cuvillier Verlag
ISBN: 3865375685
Category : Bodybuilding
Languages : en
Pages : 229
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Author: John R. Richardson
Publisher:
ISBN:
Category : Isometric exercise
Languages : en
Pages : 0
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The purpose of the study was to investigate the effects of short bouts of maximal isotonic and isometric contractions on the development of strength and muscular endurance of the extensors of the knee. Subproblems investigated were crosstransfer, hypertrophy, and specificity of training. Sixty grade ten boys enrolled in a required physical education class at Bonnie Doon high school in the city of Edmonton served as subjects. After initially being measured for girth and fat, strength at angles of 115 degrees and 135 degrees of extension, and muscular endurance (holding time), the boys were randomly divided into three groups, each group containing twenty subjects. One group became the isotonic training group; a second group became the isometric training group; the third group became the control. The exercises were performed once daily, five days a week, for five weeks. The isometric exercise programme consisted of three six second maximal contractions. One contraction was made with the leg 90 degrees flexed, one at 135 degrees of extension, and one at 165 degrees of extension. The isotonic exercise programme consisted of lifting a maximal weight from the 90 degree flexed position to the 165 degrees extended position three times daily. Each bout required six seconds for the leg to be moved through the specified range. The leg was extended at a constant rate. Results were considered statistically significant at the .05 level of confidence. It was concluded that the isotonic exercise group increased significantly over the isometric group (F=6.26[subscript .05]), and both exercise groups increased significantly over the control group (F=26.95[subscript .01]), at the 135 degree angle, when measured for strength. Both exercise groups made a significant increase in strength over the control group (F=l8.91[subscript .01]) at the 115 degree angle. The muscular endurance, when measured by employing the same weight for both initial and final tests, increased significantly for the combined isotonic and isometric group scores of the trained leg (F=4.51[subscript .01]) when compared to the control. Cross-transfer of strength was statistically significant for both isotonic and isometric exercise groups at both the 115 degrees (.01 level) and 135 degrees (.01 level) angles. There was no evidence of cross-transfer of muscular endurance. No evidence was found to support either hypertrophy or specificity training.
Author: Donald Thomas Thornton
Publisher:
ISBN:
Category : Physical education and training
Languages : en
Pages : 76
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Author: M. Maxim Asa
Publisher:
ISBN:
Category :
Languages : en
Pages : 284
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Author: Robert Louis Harris
Publisher:
ISBN:
Category : Exercise
Languages : en
Pages : 126
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Author: Frank Lee Deitrick
Publisher:
ISBN:
Category : Physical education and training
Languages : en
Pages : 96
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Author: Jerrold Scott Petrofsky
Publisher: Charles C. Thomas Publisher
ISBN:
Category : Health & Fitness
Languages : en
Pages : 178
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Author: Paul Eugene Meadows
Publisher:
ISBN:
Category : Exercise
Languages : en
Pages : 260
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