title: Rehabilitation of Patellar Tendinopathy Using Hip Extensor Strengthening and Landing-Strategy Modification: Case Report With 6-Month Follow-up.
abstract: Study Design Case report. Background Although eccentric exercises have been a cornerstone of the rehabilitation of athletes with patellar tendinopathy, the effectiveness of this intervention is sometimes less than ideal. Athletes with patellar tendinopathy have been shown to have different jump-landing patterns and lower hip extensor strength compared to asymptomatic athletes. To our knowledge, the effectiveness of an intervention addressing these impairments has not yet been investigated. Case Description The patient was a 21-year-old male volleyball athlete with a 9-month history of patellar tendon pain. Pain was measured with a visual analog scale. Disability was measured with the Victorian Institute of Sport Assessment-patella questionnaire. These assessments were conducted before and after an 8-week intervention, as well as at 6 months after the intervention. Hip and knee kinematics and kinetics during drop vertical jump and isometric strength were also measured before and after the 8-week intervention. The intervention consisted of hip extensor muscle strengthening and jump landing strategy modification training. The patient did not interrupt volleyball practice/competition during rehabilitation. Outcomes After the 8-week intervention and at 6 months postintervention, the athlete was completely asymptomatic during sports participation. This favorable clinical outcome was accompanied by a 50% increase in hip extensor moment, a 21% decrease in knee extensor moment, and a 26% decrease in patellar tendon force during jump landing measured at 8 weeks. Discussion This case report provides an example of how an 8-week intervention of hip muscle strengthening and jump-landing modification decreased pain and disability and improved jump-landing biomechanics in an athlete with patellar tendinopathy. Level of Evidence Therapy, level 4. J Orthop Sports Phys Ther 2015;45(11):899-909. Epub 21 Sep 2015. doi:10.2519/jospt.2015.6242.
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Scattone Silva
authors.forename: Ana Luisa G
authors.initials: AL
authors.lastname: Ferreira
authors.forename: Theresa H
authors.initials: TH
authors.lastname: Nakagawa
authors.forename: José E M
authors.initials: JE
authors.lastname: Santos
authors.forename: Fábio V
authors.initials: FV
authors.lastname: Serrão
mesh_terms: D001696:Biomechanical Phenomena; D012090:Cumulative Trauma Disorders / Q000503:physiopathology / Q000534:rehabilitation*; D004185:Disability Evaluation; D005081:Exercise Therapy / Q000379:methods*; D006801:Humans; D008297:Male; D010147:Pain Measurement; D017847:Patellar Ligament / Q000293:injuries*; D052256:Tendinopathy / Q000503:physiopathology / Q000534:rehabilitation*; D054798:Volleyball / Q000293:injuries*; D055815:Young Adult
keywords: biomechanics; jumper's knee; overuse; tendon; volleyball