section_30_Group_4_Week8

section_30_Group_4_Week8 - ECE 3280 Principles and Practice...

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ECE 3280 Principles and Practice of Biomedical Engineering Laboratory Range of Motion/Sit and Reach Section 30, Group 4 Felipe Zambrano (33%) Joshua Dean (33%) and KeithOldano (33%) Experiment Conducted October 21, 2011 Submitted October 28, 2011 Abstract A sit and reach is a widely performed test due to its wide acceptance as an appropriate method for measuring flexibility and a joint’s range of motion through either goniometers or inclinometers. However, traditional measuring for the sit and reach test involving goniometry measures of the hip are difficult to record due to that the goniometer has difficulty in quantifying the smallest changes or improvements in flexibility. In this experiment, the group used an electrogoniometerattached to the hip of each group member with each member performing a sit and reach test as well as a supine straight leg flexion. In the sit and reach test, a subject would sit on the ground and the subject would bend forward reaching for the greatest distance possible. The supine straight leg flexion involved a subject lying on the ground and having a group member slowly raise their leg up straight until the endpoint and then slowly lower the leg. For each test, the waveform would be changed to their appropriate angle value, which would be
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posted in the lab section’s excel sheet and be compared to the normative data. A Pearson’s comparative test was performed on the sit and reach vs. the goniometer for a value of R = 0.0102. The experiment provides interesting results about each person’s individual flexibility, and this could be a good starting point for a much larger experiment other people would consider for further testing. Introduction Flexibility is the ability of a joint to move through its full range of motion and is an trait that helps musculoskeletal system interaction because it can prevent injuries, improve body posture and position, and improve performance in other physical activities such as sports. Because flexibility is joint specific and is unique to individuals, static flexibility tests are performed based on the linear and angular measurements of a joint’s motion using goniometers and inclinometers. A sit and reach test is a type of static flexibility test that evaluates a subject’s combined flexibility of the lower back and hips; another kind of static flexibility test is the supine straight leg flexion test, which evaluates a subject’s hamstring and hip flexor flexibility. In both tests, they are assessed through a goniometer, which is a device that is capable of translating angular position into an electrical signal, and from the results they are compared to the normative flexibility values. The main value observed in the sit and reach test is the length of distance in inches the subject is able to reach from bending forward, and the supine straight leg flexion test observes the angle in degrees that the subject is able to make with their leg raised. The normative
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This note was uploaded on 11/14/2011 for the course ECE 3820 taught by Professor Wang during the Fall '11 term at GWU.

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section_30_Group_4_Week8 - ECE 3280 Principles and Practice...

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