Electromyography Analysis of Lower Body Muscle Mechanics During Maximal Vertical Jumps on a Rigid and Sand Surface

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dc.contributor.advisorPankey, Robert
dc.contributor.authorGuerrero, James Michael
dc.contributor.committeeMemberMcCurdy, Kevin
dc.contributor.committeeMemberWalker, John
dc.date.accessioned2020-05-22T15:22:08Z
dc.date.available2020-05-22T15:22:08Z
dc.date.issued2010-08
dc.description.abstractObjective: Design and Setting: All data were collected in the Jowers Center Biomechanics Supplemental Research Lab, Texas State University-San Marcos. Subjects: Sixteen healthy, physically active males and ten healthy, physically active females (age= 26.9 ± 6.5 yrs, height= 177.2 ± 10.6 cm, and weight= 79.1 ± 15.1 kg) with no reports of current lower limb or low back injuries. Measurements: All subjects performed three short step countermovement jumps each on a sand surface and a rigid surface. A 4-channel electromyography (EMO) system recorded output from the rectus femoris, vastus lateralis, biceps femoris, and gastrocnemius muscles of the right leg. A wireless waist belt accelerometer obtained subject jump height. Mean and mean peak EMO data from the lower extremity muscles was compared between the two surfaces along with jump height. Results: Analysis using an ANOVA was conducted between the two surfaces. There was a significant difference between jumping surfaces for the normalized mean and mean peak percentage EMG output measures. The rectus femoris and vastus lateralis muscles of the quadriceps registered significantly higher normalized mean and mean peak percentage EMG output measures on a sand surface. The biceps femoris and gastrocnemius muscles were significantly higher on a rigid surface for both the normalized mean and mean peak percentage EMG output measures. Conclusion: Jumping from a sand surface requires more output from the quadriceps muscles than jumping from a rigid surface.
dc.description.departmentHealth and Human Performance
dc.formatText
dc.format.extent45 pages
dc.format.medium1 file (.pdf)
dc.identifier.citationGuerrero, J. M. (2010). Electromyography analysis of lower body muscle mechanics during maximal vertical jumps on a rigid and sand surface (Unpublished thesis). Texas State University-San Marcos, San Marcos, Texas.
dc.identifier.urihttps://hdl.handle.net/10877/10176
dc.language.isoen
dc.subjectjumping
dc.subjectsynthetic sporting surfaces
dc.subjectquadriceps muscle
dc.subjectelectromyography
dc.subjectmuscle strength
dc.titleElectromyography Analysis of Lower Body Muscle Mechanics During Maximal Vertical Jumps on a Rigid and Sand Surface
dc.typeThesis
thesis.degree.departmentHealth, PE, and Recreation
thesis.degree.grantorTexas State University-San Marcos
thesis.degree.levelMasters
thesis.degree.nameMaster of Education

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