Lower limb strength and flexibility in athletes with and without patellar tendinopathy |
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| Affiliation: | 1. Department of Physical Therapy, Federal University of São Carlos, São Carlos, Brazil;2. Department of Medicine, Federal University of São Carlos, São Carlos, Brazil;1. Hacettepe University, Beytepe Hospital, Ankara, Turkey;2. Hacettepe University, School of Medicine, Department of Radiology, Ankara, Turkey;3. Hacettepe University, School of Medicine, Department of Biophysics, Ankara, Turkey;4. Hacettepe University, Faculty of Health Sciences, Occupational Therapy Department, Ankara, Turkey;5. Hacettepe University, School of Medicine, Department of Sports Medicine, Ankara, Turkey;1. College of Physiotherapy, Srinivas University, Mangalore, 575001, Karnataka, India;2. Department of Pediatric and Neonatal Physiotherapy, Maharishi Markandeshwar Institute of Physiotherapy and Rehabilitation, Maharishi Markandeshwar Deemed to be University, Mullana, 133207, Haryana, India;1. University of Newcastle, School of Environmental and Life Sciences, Ourimbah, NSW, Australia;2. University of Newcastle, Priority Research Centre for Physical Activity and Nutrition, Callaghan, NSW, Australia;3. Athlete Availability, Australian Institute of Sport, Bruce, ACT, Australia;4. University of Canberra Research into Sport and Exercise (UCRISE), University of Canberra, Bruce, ACT, Australia;5. Australian Centre for Research into Injury in Sport and its Prevention, Federation University Australia, Ballarat, VIC, Australia;6. La Trobe University Sport and Exercise Medicine Research Centre, La Trobe University, Bundoora, VIC, Australia;1. Royal Spanish Athletics Federation''s Medical Department, Madrid, Spain;2. La Trobe Sport and Exercise Research Centre, La Trobe University, Melbourne, Australia;3. Faculty of Physical Activity and Sport Science, Polytechnic University of Madrid, Spain;4. Complutense University of Madrid, Spain;1. Center for Sports Medicine, University Medical Center Groningen, University of Groningen, The Netherlands;2. Center for Human Movement Sciences, University Medical Center Groningen, University of Groningen, The Netherlands;1. University of Nebraska at Omaha, School of Health, Physical Education and Recreation, 6001 Dodge St, Omaha, NE, 68182, USA;2. Northern Arizona University, Department of Physical Therapy and Athletic Training, 435 N 5th St, Phoenix, AZ, 85004, USA;3. University of Georgia, Department of Kinesiology Biomechanics Laboratory, 330 River Rd, Athens, GA, 30602, USA;4. Oregon State University, Department of Athletic Training and Kinesiology, Langton Hall 220, Corvallis, OR, 97331, USA |
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| Abstract: | ObjectivesTo compare the hip, knee and ankle torques, as well as knee and ankle flexibility between athletes with patellar tendinopathy and asymptomatic controls.DesignCross-sectional study.SettingLaboratory setting.ParticipantsFourteen male volleyball, basketball or handball athletes, divided into 2 groups, patellar tendinopathy group (TG; n = 7) and asymptomatic control group (CG; n = 7).Main outcome measuresHip, knee and ankle isometric torques were measured with a handheld dynamometer. Weight-bearing ankle dorsiflexion, hamstring and quadriceps flexibility were measured with a gravity inclinometer.ResultsThe TG had 27% lower hip extensor torque when compared to the CG (P = 0.031), with no group differences in knee and ankle torques (P > 0.05). Also, the TG had smaller weight-bearing ankle dorsiflexion (P = 0.038) and hamstring flexibility (P = 0.006) when compared to the CG. Regarding quadriceps flexibility, no group differences were found (P = 0.828).ConclusionsStrength and flexibility deficits might contribute to a greater overload on the knee extensor mechanism, possibly contributing to the origin/perpetuation of patellar tendinopathy. Interventions aiming at increasing hip extensors strength as well as ankle and knee flexibility might be important for the rehabilitation of athletes with patellar tendinopathy. |
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| Keywords: | Jumper's knee Biomechanics Tendon Overload |
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