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


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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    • "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.
    BMC Musculoskeletal Disorders 08/2014; 15(1):266. DOI:10.1186/1471-2474-15-266 · 1.72 Impact Factor
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    • "Although between-sex discrepancy in patellar tendinopathy prevalence exists (Zwerver et al., 2011; Visnes et al., 2013), little is known about whether male and female volleyball players display different landing Fig. 2. Peak patellar tendon force (a) and patellar tendon force loading rate (b) (mean ± standard deviation) for all participants (n = 20 per group), when matched for jump height (n = 13 per group), and when matched for anthropometry (n = 9 per group). *Indicates a significant between-sex difference (P < 0.05). "
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    ABSTRACT: Patellar tendinopathy is the most common overuse knee injury in volleyball, with men reporting more than twice the injury prevalence than women. Although high patellar tendon loading is thought to be a causative factor of patellar tendinopathy, it is unknown whether between-sex variations in landing technique account for differences in patellar tendon loading. It was hypothesized that male volleyball players would display differences in landing technique and would generate higher patellar tendon loading than their female counterparts. The landing technique and patellar tendon loading of 20 male and 20 female volleyball players performing a lateral stop-jump block movement were collected. Independent t-tests were used to identify any between-sex differences in landing technique with the data grouped to account for differences in jump height and in anthropometry. Male volleyball players were taller and heavier, landed from a higher height, displayed differences in landing kinematics, generated a significantly greater knee extensor moment, and experienced higher patellar tendon loading than female players when all 40 participants were compared. However, when participants were matched on jump height, they generated similar patellar tendon loading, irrespective of their sex. These results imply that jump height is a more important determinant of patellar tendon loading than sex.
    Scandinavian Journal of Medicine and Science in Sports 01/2014; 25(2). DOI:10.1111/sms.12172 · 2.90 Impact Factor
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    • "Le basketball et le volleyball ainsi que la danse professionnelle sont très pourvoyeurs de cette pathologie et notamment les joueurs possédant une habileté importante à la détente verticale [17] [18] [19]. L'incidence chez le sportif peut atteindre 32 à 45 % sur le sportif d'élite respectivement au volleyball et basketball [6], elle est mesurée à 14 % sur 891 sportifs amateurs par Zwerver [20] et à 2,4 % chez le footballeur d'élite par Hägglund [21]. Dans une étude sur de jeunes basketteurs de haut niveau, la prévalence est retrouvée à 7 % entre 14 et 18 ans puis elle passe à 32 % entre 19 et 29 ans et 53 % des joueurs s'en sont plaints au moins une fois lorsqu'on les interroge en fin de carrière [22]. "

    Edited by Elsevier Masson, 11/2013; Mises au point sur les tendinopathies rotuliennes et calcanéennes.
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