bme lab report 2

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School

University Of Connecticut *

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Course

3600

Subject

Mechanical Engineering

Date

Dec 6, 2023

Type

pdf

Pages

17

Uploaded by KidMoonBee21

Report
Rojas 1 Lab 1: Balance Control Testing with Sports Helmets Written by: Isabella Rojas Group Members: Adam Badgley, Victoria Ballestas, Diego Melendez BME 3600 Lab Section 001L Group 1
Rojas 2 Table of Contents Title Page: ........................................................................................................................................ 1 Table of Contents: ............................................................................................................................ 2 Introduction: ..................................................................................................................................... 3 Methods: .......................................................................................................................................... 4 Results: ......................................................................................................................................... 5-7 Discussion: .................................................................................................................................. 8-10 Conclusion: .................................................................................................................................... 11 References: ..................................................................................................................................... 12 Appendix: ................................................................................................................................. 13-17
Rojas 3 Introduction This second Biomechanics lab was on nonlinearity of human balance during two different positions on a force platform: quiet standing and lifting the subject’s dominant leg, in this case my right leg, in my frontal plane. We did this to understand the interaction of movement of body balance and center of pressure (COP), which are major components of human balance. We come to learn how to determine the influence of COP on body balance during the different static postures and wearing different sports helmets, including the helmets designs of football. Baseball, softball, and hockey. For many years, there have been increasing rates of Traumatic Brain Injuries (TBI) in sports-related activities, especially in children and young adults. TBI usually results from a violent jolt to the head or body causing a wide range of physical and psychological effects. To prevent TBI, good balance is needed to not only decrease the risk of falling, but to also recover rapidly when someone is about to fall. This lab aims to analyze the balance control of the human body and to also measure the effects of various sports helmets on body balance and center of pressure (COP). As much as the helmet protects the head from a direct hit, it also affects an athlete's balance because of its weight and overall structure. As a biomedical engineer, more information about balance and COP in circumstances with different sports helmets would help with better design of sports gear so athletes can play safer with an improved biomechanical performance.
Rojas 4 Methods This lab consisted of a few pieces of equipment and materials: - AMTI force platform Accusway RS-232 - AMTI Netforce version 3.5.2 software - BioAnalysis version 2.3.1 software - Nike Pro Gold TCF 10 Batter’s Baseball Helmet - Riddell Revolution Speed Football Helmet - Natural Grip Two Tone with Mask Softball Helmet - Bauer 9900 Hockey Helmet In the beginning, my height and weight were measured and taken using a scale and tape measure. Their gender, level of activity, and leg dominance were recorded as well. The subject then performed the quiet standing on the force platform with no helmet. In quiet standing, the subject stands with their feet around hip distance apart with their hands by their sides, and looking straight at the wall that has a big black X mark. The subject stays in that position for 20 seconds while the person at the computer is gathering the net force and taking the measurements. After the measurement is complete, the subject steps down from the platform and has a resting time of about 15 seconds. Next, the subject stood on one leg on the force platform with their right leg raised in the frontal plane, approximately 30 degrees from their standing position. The subject maintains this position for 20 seconds again while the measurements are being taken and then they step down from the platform. The quiet standing and raised leg positions were performed four more times each while the subject was wearing a football helmet, a baseball helmet, a softball helmet, and a hockey helmet. After finishing and getting the statistics, the subject’s comfort level with each helmet was recorded on a paper for later reference.
Rojas 5 Results Table 1: Subject Body Measurements Subject Name Isabella Rojas Height [in.] 63 Weight [lbs.] 130 Gender Female Exercise Level Low Hand Dominance Right Table 2: Comfort Level of Each Helmet Helmet Design Comfort Level (0-10) where Higher is the Most Comfort Football 2 Baseball 8 Softball 8 Hockey 6 Table 3: Data for Subject’s Quiet Standing No Helmet Football Baseball Softball Hockey Avg Displacement along X [cm.] 0.287 0.295 0.198 0.343 0.617 Avg displacement along Y [cm.] 0.457 0.511 0.513 1.12 0.744 Avg. radial displacement [cm.] 0.574 0.648 0.587 1.217 1.021 SD-Major Axis of 95% ellipse 0.325 0.478 0.645 1.212 1.021
Rojas 6 SD-Minor Axis of 95% ellipse 0.549 0.513 12 0.5 0.538 Avg. velocity [cm/sec] 21.763 26.091 23.317 26.03 22.921 Length [cm.] 36.281 43.492 38.875 43.404 38.219 Table 4: Data for Subject’s Right Leg Raised No Helmet Football Baseball Softball Hockey Avg Displacement along X [cm.] 0.518 0.64 0.447 0.973 0.594 Avg displacement along Y [cm.] 0.851 1.029 0.599 1.361 0.813 Avg. radial displacement [cm] 1.082 1.3 0.815 0.795 0.45 SD-Major Axis of 95% ellipse 0.892 0.892 0.709 0.904 0.556 SD-Minor Axis of 95% ellipse 0.861 1.146 0.582 1.41 0.841 Avg. velocity [cm/sec] 64.282 71.811 49.012 60.594 61.326 Length [cm.] 107.15 91.146 81.676 100.998 102.23 Figure 1: Overlaid 95% Ellipse of Quiet Standing
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