The Acute Effects of an Isometric Loading Intervention on Lower Extremity Landing Biomechanics in Individuals With Patellar Tendinopathy
Overview
- Phase
- Not Applicable
- Intervention
- Not specified
- Conditions
- Tendinopathy
- Sponsor
- University of North Carolina, Chapel Hill
- Enrollment
- 43
- Locations
- 1
- Primary Endpoint
- Difference in the change in mean internal knee extension moment during landing between groups
- Status
- Completed
- Last Updated
- 7 years ago
Overview
Brief Summary
The purpose of this study is to determine differences in lower extremity landing biomechanics and real-world physical activity between individuals with patellar tendinopathy compared to individuals without patellar tendinopathy,and to determine the acute effects of an isometric loading intervention on lower extremity landing biomechanics in individuals with patellar tendinopathy.
Investigators
Eligibility Criteria
Inclusion Criteria
- •The investigators will recruit a convenience sample of participants who meet the following overall criteria:
- •Age 15 and post-pubertal (confirmed by Pubertal Development Scale Questionnaire) - 28 years
- •Actively participating within an organized sport setting (high school, collegiate, club, competitive intramural sports) in their respective team's weekly training and competitions, quantified by a Tegner Activity Level Scale of at least 5.
Exclusion Criteria
- •The following exclusion criteria will be applied to all participants:
- •Any anterior knee pain with no patellar tendon abnormality on ultrasound assessment.
- •History of any knee joint surgery ever.
- •History of other (non-knee) lower extremity surgery in the last 1 year.
- •History of lower extremity injury in last 6 months (other than patellar tendinopathy).
- •An injection (corticosteroids, plasma-rich-protein, etc.) to the patellar tendon in the last 3 months.
- •Known history of osteoarthritis or current symptoms related to osteoarthritis (i.e. stiffness, swelling).
- •Participation in formal rehabilitation for patellar tendinopathy in prior 3 months
- •Known neurological disorders, including: stroke, multiple sclerosis, ALS, diabetic neuropathy, epilepsy, traumatic brain injury resulting in loss of consciousness, concussion within the last 6 months, cranial neural surgery, balance disorders.
- •Use of pacemaker or another implantable electronic device.
Outcomes
Primary Outcomes
Difference in the change in mean internal knee extension moment during landing between groups
Time Frame: Pre- and post-intervention condition (~30 minutes)
Angular force or moment will be measured in Nm/kg\*m where "Nm" represents angular force and "kg\*m" represents normalization to body weight and height.
Difference in the change in mean internal hip flexion moment during landing between groups
Time Frame: Pre- and post-intervention condition (~30 minutes)
Angular force or moment will be measured in Nm/kg\*m where "Nm" represents angular force and "kg\*m" represents normalization to body weight and height.
Difference in the change in mean peak patellar tendon force during landing between groups
Time Frame: Pre- and post-intervention condition (~30 minutes)
Patellar tendon force will be measured in N(BW) where "N" is a measure of force and "BW" represents normalization to body weight.
Difference in the change in mean peak vertical ground reaction force during landing between groups
Time Frame: Pre- and post-intervention condition (~30 minutes)
Vertical ground reaction force will be measured in N(BW) where "N" is a measure of force and "BW" represents normalization to body weight.
Difference in the change in mean peak vertical ground reaction force loading rate during landing between groups
Time Frame: Pre- and post-intervention condition (~30 minutes)
Vertical ground reaction force loading rate will be measured in N(BW)/s where "N" is a measure of force and "BW" represents normalization to body weight and "s" is the time unit seconds.
Secondary Outcomes
- Difference in average minutes of moderate-to-vigorous physical activity (MVPA) between groups(Day 1 - Day 7)
- Difference in change in anterior knee pain (self-reported via visual analog scale (0-10)) between groups(Pre- and post-intervention condition (~10 minutes))
- Difference in average steps-per-day between groups(Day 1 - Day 7)