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

What is FAI?

bone spurs develop on the femoral head

prevent normal motion of the hip eventually can cause osteoarthritis

of the hip

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

Wolff’s Law

Structure and shape of bones will be altered over time in response to forces placed on them.

HypothesisPerforming repetitive motions during intense training exerts a load on the femoral head and acetabulum eventually causing FAI.

Objective Measure motion pervasively Identify femoral shapes

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

Measuring pervasively 3 axis accelerometer 3 axis gyroscope

Measuring pervasively

Accelerometer

Gyroscope

Time (seconds)

deg/s

g

Walking Quickly

X planeY planeZ plane

Measuring pervasively

Accelerometer

Gyroscope

Time (seconds)

deg/s

Up Stairs

g

X planeY planeZ plane

Measuring pervasively

Accelerometer

Gyroscope

Time (seconds)

deg/s

g

Jumping Jacks

X planeY planeZ plane

Evolution of the Hip

Coxa recta Coxa rotunda

Coxa recta - run and jump Coxa rotunda - swim and climb

Horse Walrus

Characterizing shape CT scans Rapid prototype

Characterizing shape

Future Applications

Pilot data for grant Focus groups include

Hockey player Gymnasts Dancers

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

QUESTIONS