Department of Physical Therapy Student Theses, Dissertations and Capstones

Document Type

Thesis - NSU Access Only

Degree Name

Master of Physical Therapy (MPT)

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College of Health Care Sciences - Physical Therapy Department

Publication Date / Copyright Date



Nova Southeastern University


Purpose: The purpose of this study was to investigate the change in EMG activation during eight repetitions of the dead lift exercise.

Subjects and Method: The subjects were six male physical therapy student volunteers (mean age = 28.3 years) who had varying degrees of noncompetitive experience and were physically active but not engaged in organized sports. An experimental design was used to examine the difference in surface EMG activity for two dead lift conditions, one wearing a standard weight-belt (WB) and one without using the standard weight-belt (WOB). The four specific muscles which were tested were the external oblique, erector spinae, vastus lateralis, and the biceps femoris muscle.

Results: Dependent measures t-test was used for all of the variables to find possible differences between the two conditions WB and WOB and non of the comparisons yielded statistical significance.

Conclusion: The lifters in this study showed no appreciable changes of EMG activiation across repetitions as determined by the two conditions. The differences that were observed between the WB and WOB conditions were that WB repetitions were performed more quickly than the WOB repetitions. Wearing a weight-belt for an 8 repetition maximum showed no significant difference in the changes of EMG activation.


Physical Therapy

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