Article

Prevalence of Jumper's Knee Among Nonelite Athletes From Different Sports A Cross-Sectional Survey

Center for Sports Medicine, University Center for Sport, Exercise and Health,, University Medical Center Groningen, Groningen, The Netherlands.
The American Journal of Sports Medicine (Impact Factor: 4.36). 07/2011; 39(9):1984-8. DOI: 10.1177/0363546511413370
Source: PubMed

ABSTRACT

The prevalence of jumper's knee among nonelite athletes from different sports is unknown.
This study was undertaken to determine the prevalence of jumper's knee in nonelite athletes from different sports and to determine potential risk factors for jumper's knee. Design: Cohort study (prevalence); Level of evidence, 2.
The authors interviewed 891 male and female nonelite athletes from 7 popular sports in The Netherlands: basketball, volleyball, handball, korfball, soccer, field hockey, and track and field. Using a specially developed questionnaire, information was obtained about individual characteristics (age, height, and weight), training background, previous and actual knee problems, and the VISA-P (Victorian Institute of Sport Assessment-Patella) score.
The overall prevalence of current jumper's knee was 8.5% (78 of 891 athletes), showing a significant difference between sports with different loading characteristics. Prevalence was highest among volleyball players (14.4%) and lowest among soccer players (2.5%); it was significantly higher among male athletes (51 of 502 [10.2%]) than female athletes (25 of 389 [6.4%]) (χ(2) = 3.91, P = .048). The mean duration of symptoms was 18.9 months (standard deviation [SD], 21.6; median value, 12.0; range, 2.0-59.8). The mean VISA-P score of the athletes with jumper's knee was 71.4 (SD, 13.8). Athletes with jumper's knee were significantly younger, taller, and heavier than those without jumper's knee.
Prevalence of jumper's knee is high among nonelite athletes and varies between 14.4% and 2.5% for different sports. Jumper's knee is almost twice as common among male nonelite athletes compared with female athletes. Different sport-specific loading characteristics of the knee extensor apparatus, a younger age, a taller body stature, and higher body weight seem to be risk factors associated with patellar tendinopathy.

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    • "The remaining women presented with normal patellar tendon imaging and no knee symptoms or with symptoms consistent with dysfunctions other than patellar tendinopathy. This nding is supported by previous studies that have found that patellar tendinopathy is more prevalent in males in comparison to females (Zwerver et al., 2011). Six male athletes with patellar tendon abnormalities but no current symptoms in the knee joint were also excluded. "
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    ABSTRACT: To compare the hip, knee and ankle torques, as well as knee and ankle flexibility between athletes with patellar tendinopathy and asymptomatic controls.
    No preview · Article · Dec 2015 · Physical Therapy in Sport
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    • "It is a common cause of complaint and leave in soccer, basketball and volleyball [2] [3] The overall prevalence of PT has been reported as of 14.2% in the general population, being higher in athletes, with as much as 44.6% in elite volleyball players and 31.9% in basketball players [3]. There is an overall prevalence of 8.5%, being higher in volleyball players (14.4%) and lower in soccer players (2.5%) [13]. PT has been defined as an overuse injury caused by repetitive mechanical stress loads on the patellar tendon [4] that cause an initial inflammatory response followed by a stage of degeneration [5] [6]. "
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    ABSTRACT: Corresponding author. Fenway Medical Shockwave Medicine Center, Carrera 7B Bis # 132 – 38, Piso 8, Bogota DC – 00110, Colombia.
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    • "Patellar tendinopathy, which is also known as “jumper’s knee”, is traditionally considered to be mainly a disease of athletes, especially those participating in sports involving significant force through the patellar tendon [2]. The prevalence and significance of patellar tendinopathy have been illustrated in a number of samples of athletes from different sports, with prevalence ranging from 2.5% to 41% [3,20,34]. Data are limited regarding the prevalence of patellar tendinopathy in non-athletic, healthy middle-aged to older populations. Our study demonstrated that the prevalence of MRI defined patellar tendinopathy was 28.3% in a community-based population of adults without clinical knee disease, supporting the findings from a previous study that prevalence of patellar tendinopathy is increased in older populations [35]. "
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    ABSTRACT: Background Patellar tendinopathy is a common cause of activity-related anterior knee pain. Evidence is conflicting as to whether obesity is a risk factor for this condition. The aim of this study was to determine the relationship between obesity and prevalence of magnetic resonance imaging (MRI) defined patellar tendinopathy in community-based adults. Methods 297 participants aged 50–79 years with no history of knee pain or injury were recruited from an existing community-based cohort. Measures of obesity included measured weight and body mass index (BMI), self-reported weight at age of 18–21 years and heaviest lifetime weight. Fat-free mass and fat mass were measured using bioelectrical impedance. Participants underwent MRI of the dominant knee. Patellar tendinopathy was defined on both T1- and T2-weighted images. Results The prevalence of MRI defined patellar tendinopathy was 28.3%. Current weight (OR per kg = 1.04, 95% CI 1.01-1.06, P = 0.002), BMI (OR per kg/m2 = 1.10, 95% CI 1.04-1.17, P = 0.002), heaviest lifetime weight (OR per kg = 1.03, 95% CI 1.01-1.05, P = 0.007) and weight at age of 18–21 years (OR per kg = 1.03, 95% CI 1.00-1.07, P = 0.05) were all positively associated with the prevalence of patellar tendinopathy. Neither fat mass nor fat-free mass was associated with patellar tendinopathy. Conclusion MRI defined patellar tendinopathy is common in community-based adults and is associated with current and past history of obesity assessed by BMI or body weight, but not fat mass. The findings suggest a mechanical pathogenesis of patellar tendinopathy and patellar tendinopathy may be one mechanism for obesity related anterior knee pain.
    Full-text · Article · Aug 2014 · BMC Musculoskeletal Disorders
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