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Title: Strength of shoulder rotator muscles and its relationship to throwing performance in children
Researcher: Juneja, Hemant
Guide(s): Verma, S K
Keywords: External rotators
Internal rotators
Standing Throw
Upload Date: 19-Jul-2013
University: Punjabi University
Completed Date: 2012
Abstract: Background : External (ER) and the Internal Rotators(IR) of the shoulder play a vital role in the throwing mechanism and any alteration in their activity is likely to have a major effect on the throwing performance. Considerable amount of work has been done on muscle strength and imbalances between Isokinetic External Rotators(ER) and Internal Rotators(IR) of the shoulder in adult throwers, shoulder injuries in throwing and their rehabilitation, but there was a paucity of research linking throwing performance and Isometric and Isotonic Shoulder rotator muscles strength. Aims and Objectives: Studying the relationship between Isometric and Isotonic strength and strength ratios of the shoulder rotators and throwing performance in the age group of 16-18. In addition to this, the study also attempts to find out the effect of end range Isometric training of ER and IR muscles and its effect on throwing performance measured as distance. Materials and Methods: Isometric and Isotonic strength of ER and IR was measured using strain gauge and 1RM methods to find out the ratios between the two groups. Throwing performance was measured as distance which was studied for its relationship to throwing performance. End range Isometric Training was given to ER muscles in 60 subjects to improve ratios and the change in throwing distance was observed in this group over a period of 8 weeks. Results: The major findings of this study were the significant co-relations between Strength ratios of ER:IR measured isometrically and isotonically and throwing distance.. The ratio of ER : IR was approximately .61 at 700 but was found to be .59 when measured at 900 of External Rotation which was statistically significant. The results of our study revealed a significant correlation of isometric ratios of ER: IR and throwing performance measured as throwing distance. The 1 RM ER: IR ratios were found to be 0.62 and there was no statistical differences between Isometric and isotonic ratios.
Pagination: x, 155p.
Appears in Departments:Department of Sports Science

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01_title.pdfAttached File44.11 kBAdobe PDFView/Open
02_abstract.pdf131.4 kBAdobe PDFView/Open
03_certificate.pdf93.57 kBAdobe PDFView/Open
04_declaration.pdf111.33 kBAdobe PDFView/Open
05_acknowledgements.pdf87.76 kBAdobe PDFView/Open
06_contents.pdf102.45 kBAdobe PDFView/Open
07_list of figures.pdf101.53 kBAdobe PDFView/Open
08_list of tables.pdf130.65 kBAdobe PDFView/Open
09_list of graphs.pdf105.12 kBAdobe PDFView/Open
10_list of abbreviations.pdf81.71 kBAdobe PDFView/Open
11_chapter 1.pdf525.74 kBAdobe PDFView/Open
12_chapter 2.pdf2.38 MBAdobe PDFView/Open
13_chapter 3.pdf8.56 MBAdobe PDFView/Open
14_chapter 4.pdf491.12 kBAdobe PDFView/Open
15_chapter 5.pdf162.93 kBAdobe PDFView/Open
16_references.pdf207.78 kBAdobe PDFView/Open
17_appendix.pdf140.53 kBAdobe PDFView/Open

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