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Category: Lower Extremity Amputation

Upper Body Workout Device

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---- PROTOTYPE --------- PURPOSE: To create a prototype of an upper body workout device for an individual with cerebral palsy to help his upper body to gain strength and improve his range of motion. The Upper Body Workout Device consists of a steel frame with a cable and pulley system on each side, allowing him to exercise each arm individually. Forearm sleeves attach in three different positions to allow workouts targeting the biceps, triceps and deltoid muscles. Resistance is varied using free weights. The device also includes a repetition counter to track progress. The steel frame is constructed from 2.5 x 1.5 inch steel tubing. The frame is split in half at the top and bottom crossbeams, held together by two 24-inch angle braces bolted at eight locations on each brace. At the top crossbeam, two 1-inch square holes provide clearance for the tension cables. Two 2-inch diameter pulleys reside at the top of the frame. Two additional 1.5-inch diameter pulleys mount on the vertical beams, 6 inches from the ground. Two 24 x 1.5 inch drawer glides are mounted on the outside of the vertical beams, 10 inches off the ground. Two 4.5 x 5 inch L-brackets attach to the drawer glides, each holding a 6 x 7 inch high density polyethylene platform to hold weights. Solid aluminum rods, 6 inches long and 1 inch in diameter, provide mounting pins to stabilize the weights, each having a circular hole in the center. Vinyl-coated .125-inch steel tension cables secure to the top of the drawer glides. These main cables loop around the top of the frame, over the upper pulleys, and through the clearance holes. At the user-end of each cable is a loop, created using standard cable hardware. Two additional sets of 20-inch cables are used for the shoulder-fly exercises. Additionally, two 78-inch tension cables are permanently looped through the lower pulleys for the bicep exercise. For the shoulder fly and bicep exercises, the appropriate cables attach to the main cable using carabiners. The forearm sleeves are modified from Ossur brand 10 inch Vinyl Wrist Cock-Ups Two nylon straps made from seat-belt material, sewn near the wrist area and forearm area of the brace, provide attachment points for quick-link threaded connectors, each 6.25 inch long by 7/32 inch diameter. These connectors attach to the ends of the appropriate cables using carabiners. A repetition counter, consisting of a microcontroller, LCD display and magnetic sensors, provides the user with a count of the number of repetitions for each exercise. The cost of components of the device is about $1,300, including the cost of welding ($500) and powder-coating ($250), both of which were donated. DIMENSIONS (HxLxW): The frame is 72 x 48 x 40 inches. WEIGHT: 150 pounds. TITLE: Upper Body Workout Device. JOURNAL: NSF 2010 Engineering Senior Design Projects to Aid Persons with Disabilities. REF: Chapter 7: pp. 56-57. PAGES: 3 with cover. 2010. http://nsf-pad.bme.uconn.edu/2010/CHAPTER%207%20DUKE%20UNIVERSITY.pdf.


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Upper Body Workout Device

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