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By Semaj Rashad IEGR 360: Ergonomics and Workplace Design Dr. B. Kattel Department of Industrial & Systems Engineering Morgan State University Fall 2011.

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Presentation on theme: "By Semaj Rashad IEGR 360: Ergonomics and Workplace Design Dr. B. Kattel Department of Industrial & Systems Engineering Morgan State University Fall 2011."— Presentation transcript:

1 By Semaj Rashad IEGR 360: Ergonomics and Workplace Design Dr. B. Kattel Department of Industrial & Systems Engineering Morgan State University Fall 2011

2 Agenda Objectives Methodology Background and Introduction Problem Definition Materials Results and Discussion Conclusion References

3 Objectives Recognize and see the concepts of applied ergonomics studies in an experiment. Recognize and see the concepts of a Body Part Discomfort Survey in an experiment. To practice anthropometric body measurement investigations To practice the general systems approach to ergonomics

4 Methodology Static Anthropometry Foot Length Scientific Management Adaptation Does a problem exist? Analysis of Problem Search for Possible Solutions Evaluate Alternatives Recommend Solution Implement solution

5 Background Anthropometry – body dimensions and measurements Static Anthropometry- body measured without motion. Foot Length – Distance from the back of the heel to tip of longest toe (parallel to the long axis of the foot) Bio-mechanical Approach – determine forces exerted on musculoskeletal system Flat-footed or fallen arches - low arch or no arch at all

6 Introduction Each foot is an intricate structure: 26 bones 33 joints 107 ligaments 19 muscles 2 arches 31 tendons 7,000 nerve endings 125,000 sweat glands Arch provides elastic, springy connection between the forefoot and the hindfoot. This relationship ensures that most of the forces incurred during weight bearing can be dissipated before reaching the long bones of the leg and thigh.

7 Introduction Without support problems can develop with lower body: knees, hips and lower back The biomechanical theory is that the arch-support orthotic will provide biomechanical support to the foundation of the body (the feet) will improve lower-extremity and whole-body alignment/biomechanics.

8 Problem Definition Subject A and B, both with fallen arches or flat feet, experience periodic pain in their feet, mostly located around the arch They have been recommended by doctors to try shoe inserts or insoles This study seeks to find the shoe insert that is the most comfortable solution

9 Materials Compared 5 arch support orthotic (shoe insert) brands Arch Pro-Tec Birkenstock Arch Supports Dr. Rosenbergs Instant Arches Sorbothane Ultra Orthotic Arch Shock Doctor – Ultra 2 Insole 3 types of shoes used per user

10 Procedure 1. Wear each shoe with each arch-support orthotic for 1 full day 2. Rate the comfort of the arch-support orthotic On a scale from 1-5 (1: very uncomfortable – 5: very comfortable) Provide comments 3. Answer follow-up questions about the experience with each arch-support orthotic

11 User A User A Profile Male, 24, 55, 150 lbs., Shoe size = 9 mens

12 Shoes worn for User A Shoes: dress shoe sneaker (high top) sneaker (low top)

13 User B User B Profile: Female, 24, 54, 130 lbs. Shoe size = 8.5 womens

14 Shoes worn for User B

15 Arch Support Orthotics Tested Arch Pro Tec Birkenstock

16 Arch Support Orthotics Tested Dr. Rosenberg Sorbothane

17 Arch Support Orthotics Tested Shock Doctor

18 Comfort Ratings Table Raw Data of Comfort Ratings (on a scale of 1-5) Taken during months of October – November User performed numerous day-to-day tasks including walking, working, sitting, etc. with the various arch support orthotics

19 Comfort Ratings Graph

20 Statistical Analysis Most favorable based on Combined Average Ratings: 1. Sorbothane 2. Shock Doctor 3. Dr. Rosenberg 4. Birkenstock 5. Arch Pro-Tec

21 Sample Survey Responses From Users User B on Arch Pro-Tec (wearing black boots) They felt tight around my arch, but I dont feel like it improved anything. User A on Birkenstock (wearing dress shoes) mild comfort, felt tight in the shoe (not enough room) User B on Dr. Rosenbergs (wearing black boots) I could feel them under my arch which felt akward and made my foot hurt after a while. I had to remove them before the end of the day User A on Sorbothane (wearing black low top sneakers) Eomfortable, barely noticed they were there…no discomfort at any period of the day. User B on Shock Doctor (sneakers) Entire foot felt great…I recommend only wearing in sneakers

22 Conclusions and Recommendations Based on the surveys and experimental analysis Sorbothane Ultra Orthotic Arches are recommended for users with fallen arches or flat feet. Received the highest average comfort ratings for various types of shoes Applicable to various industries: Manufacturing where one may be standing for an extended period U.S. Army where walking for an extended period of time has kept flat footed individuals out in some cases

23 References Flat Feet - NHS Choices. (n.d.). NHS Choices. Retrieved November 28, 2011, from Flat Feet - Symptoms. (2010, April 2). NHS Choices. Retrieved November 28, 2011, from Foot Facts. (2008). Synergy Massaging Insoles. Retrieved November 28, 2011, from Franco, A. H. (n.d.). Pes Cavus and Pes Planus : Analyses and Treatment. Journal of American Physical Therapy Association. Retrieved November 28, 2011, from Kavros, S. J., Van Straaten, M. G., Coleman Wood, K. A., & Kaufman, K. R. (2011, March 16). Forefoot plantar pressure reduction of off-the-shelf rocker bottom provisional footwear. Clinical Biomechanics. Retrieved November 28, 2011, from um.researchport.umd.edu/science?_ob=MiamiImageURL Kelaher, D., Mirka, G. A., & Dudziak, K. Q. (2000). Effects of semi-rigid arch-support orthotics: an investigation with potential ergonomic implications. Applied Ergonomics, 31, Nigg, B. M., Nurse, M. A., & Stefanyshyn, D. J. (1999). Shoe inserts and orthotics for sport and physical activities : Medicine & Science in Sports & Exercise. Medicine Science in Sports Exercise. Retrieved November 28, 2011, from msse/Fulltext/1999/07001/Shoe_inserts_and_orthotics_for_sport_and_physical.3.aspx


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