Why study hip fracture?
• Hip fractures occur in approximately 300,000 individuals over 65 years of age and is on the rise
• 53.3% of those who fall, fall again • 50% loss of function in involved lower extremity post fracture
• 25% increased mortality rate 1 year post hip fracture
An asymmetry in force production has been found to exist between fractured/non- fractured sides during a sit-to-stand task post hip fracture, despite having adequate
capacity to perform the task symmetrically.
Houck 2011 found the asymmetry is a result of weakness in the fractured lower extremity.
Briere 2013 found the asymmetry is a result of motor control dysfunction in the nervous system rather than a pure strength deficit.
An explanation for these errors could be that patients rated their perceived effort distribution rather than their force/weight distribution through their lower extremities during a functional sit to stand task
