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A Physical Demands Comparison Of Three Direct-Current Right Angle Power Tool Tightening Strategies, Christian Lee Steingraber
A Physical Demands Comparison Of Three Direct-Current Right Angle Power Tool Tightening Strategies, Christian Lee Steingraber
Electronic Theses and Dissertations
The purpose of this study was to compare the physical demands associated with three direct-current (DC) right angle power tool tightening strategies. Thirty-six participants (x ̅ = 37.14 years ± 12.03) were assigned to one of two experimental groups: 1) Hard joint (30o, n=18), and, 2) Soft joint (540o, n=18). Within each experimental group, participants performed 36 trials, consisting of 3 tightening strategies, 3 target torques and 4 joint locations, in random order. Data from 3Dlinear sensor handle, motion capture markers, and Borg ratings were analyzed. Repeated measures ANOVA with Tukey’s post hoc test were used to determine statistical significance …
Ergonomic Evaluation For Right Angle Power Tools: Direct Current Physical Demands Comparison – A Focus On Muscle Activity, Danielle Devries
Ergonomic Evaluation For Right Angle Power Tools: Direct Current Physical Demands Comparison – A Focus On Muscle Activity, Danielle Devries
Electronic Theses and Dissertations
The purpose of this study was to evaluate the differences in muscle activation and handle forces between three direct current right angle power tool fastening strategies: turbo tight, two stage without soft stop and two stage with soft stop. Thirty-six participants (20-60 yrs) were assigned to one of two experimental groups: hard-joints or soft-joints. Participants conducted fastenings at four different postures for three different target torques and muscle sEMG was collected on 16 muscles of the upper body. Data from the muscle sEMG, and forces collected at the handle were analyzed using repeated measures ANOVA with Tukey’s post hoc test …