1. The Role of Exercise on Hip Deformities: Femoral Acetabular Impingement (FAI)
Olivia Venezia, YSP participant, Revere High School
Youssr Attia, YSP participant, Al Noor Academy
Amanda Anderson, Undergraduate, Northeastern University
Professor Shefelbine, Mechanical/Industrial Engineering, Northeastern University

2. What is FAI? bone spurs develop on the femoral head
prevent normal motion of the hip
eventually can cause osteoarthritis of the hip

3. Who gets FAI?
elite child athletes (> 8 hours / week) in certain sports
hockey players
soccer players
basketball players

4. Wolff’s Law
Structure and shape of bones will be altered over time in response to forces placed on them.

5. Hypothesis
Performing repetitive motions during intense training exerts a load on the femoral head and acetabulum eventually causing FAI.
Performing single plane exercises places a load on the femoral head and acetabulum eventually causing FAI.

6. Objective
Measure motion pervasively
Identify femoral shapes

7. Measuring pervasively
Mechanomyogram (MMG)
3 axis accelerometer
3 axis gyroscope
World Congress of Biomechanics

8. Measuring pervasively
3 axis accelerometer
3 axis gyroscope

9. Measuring pervasively
Walking Quickly
Accelerometer g
Gyroscope
deg/s
Time (seconds)
X plane
Y plane
Z plane

10. Measuring pervasively
Up Stairs
Accelerometer g
Gyroscope
deg/s
Time (seconds)
X plane
Y plane
Z plane

11. Measuring pervasively
Jumping Jacks
Accelerometer g
Gyroscope
deg/s
Time (seconds)
X plane
Y plane
Z plane

12. Coxa recta Coxa rotunda
Evolution of the Hip
Coxa recta Coxa rotunda
Coxa recta - run and jump
Coxa rotunda - swim and climb
Horse Walrus

13. Characterizing shape
CT scans
Rapid prototype

14. Characterizing shape

15. Future Applications Pilot data for grant Focus groups include
Hockey player
Gymnasts
Dancers

16. Acknowledgements Center for STEM Education
Young Scholars Program & Team
Claire Duggan - Director
Kassi Stein, Jake Holstein, Chi Tse - YSP Coordinators
Richard Woodward- Designed sensors
Professor Shefelbine
Amanda Anderson
Sabah Nobakhti

17. Questions