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Jumper's knee paradox--jumping ability is a risk factor for developing jumper's knee: a 5-year prospective study


, : Jumper's knee paradox--jumping ability is a risk factor for developing jumper's knee: a 5-year prospective study. British Journal of Sports Medicine 47(8): 503-507

The ‘jumper's knee paradox’, where symptomatic athletes appear to perform better in a counter movement jump (CMJ) compared to asymptomatic controls in previous case–control studies is not fully understood. The aim was to examine the relationship between jumping ability and change of jumping ability as potential risk factors for developing jumper's knee. A 5-year prospective cohort study among elite volleyball players, aged 16–18. Jump tests were done on a portable force plate at the time of inclusion and semiannually. Jumper's knee was diagnosed based on a standardised clinical examination. All 150 students (68 males and 82 females) were included and 28 developed jumper's knee (22 males and 6 females). At the time of inclusion, male athletes who went on to develop jumper's knee had significantly better results in CMJ (38.0±5.8 cm) compared to asymptomatic males (34.6±5.5 cm, p=0.03), while no difference was detected in standing jump (SJ: jumper's knee: 30.3±7.4 cm, asymptomatic: 28.1±6.1 cm, p=0.23). In a multivariate logistic regression analysis corrected for gender and previous volleyball training, the OR was 2.09 (1.03–4.25) per cm difference in CMJ at the time of inclusion. Our results did not reveal any significant differences in the change in jumping ability between the groups, although both groups improved their jump performance. Volleyball players with a natural ability for jumping high are at an increased risk for developing jumper's knee.

US$19.90

PMID: 23060653

DOI: 10.1136/bjsports-2012-091385


Other references

Ajello, L.P.dhye, A., 1979: Keratinophilic fungi from the Galapagos Islands. Revista ecuatoriana de higiene y medicina tropical2(32): 65-68

Yablonski M.; Ullrich F.; Gordon R.; Harmon G., 1991: Combining 5 fluorouracil injections and systemic steroids after trabeculectomy. Investigative Ophthalmology & Visual Science 32(4): 1122

Fairman, B.J.; Hwang, S.; Alexandre, P.K.; Gallo, J.J.; Eaton, W.W., 2017: Costs of substance use disorders from claims data for Medicare recipients from a population-based sample. Medicare spending is projected to increase over the next decade, including for substance use disorders (SUD). Our objective was to determine whether SUDs are associated with higher six-year Medicare costs (1999-2004) among participants in the Balt...

Bodnar, R.J.; Rodgers, M.E.; Chen, W.C.W.; Wells, A., 2014: Pericyte regulation of vascular remodeling through the CXC receptor 3. To understand the role, if any, played by pericytes in the regulation of newly formed vessels during angiogenesis. In this study, we investigate whether pericytes regulate the number of nascent endothelial tubes. Using an in vitro angiogenesis ass...

Buklina, S.B., 2001: Memory impairment and deep brain structures. Clinical and neuropsychological investigations were performed using the Luriya method in 141 patients with arteriovenous malformations (AVM). These included 27 patients with AVM in different parts of the caudate nucleus, 34 with AVM in the thalamu...

Ball, D.M.; Glue, P.; Wilson, S.; Nutt, D.J., 1991: Pharmacology of saccadic eye movements in man. 1. Effects of the benzodiazepine receptor ligands midazolam and flumazenil. A paradigm for assessing benzodiazepine receptor sensitivity was developed using intravenous midazolam in normal volunteers. After administration of incremental doses of midazolam, alterations in saccadic eye movement parameters and psychological...

Kumar, S.S., 2005: Mesh fixation in laparoscopic repair of ventral hernia: a new method. During laparoscopic repair of ventral hernia, optimal fixation of the prosthetic mesh to the abdominal wall includes transfascial fixation with sutures in addition to fixation with a stapling, clipping, or tacking device. With the current methods,...

Wright, N., 1968: As it looks from here. The importance of communication. Hospital Management 105(3): 85-86

Lazic, B.; Stevanovic, D.; Vasiljevic, Z., 1997: Vegetable and potato production in Yugoslavia. An overview is given of the characteristics of vegetable and potato production in Yugoslavia, research and development associated with seed production, agricultural practices and breeding new varieties of vegetable, and production possibilities.

Casida, L.E., 1961: Present status of the repeat-breeder cow problem. Hansel alleges that the method of cycle synchronization by corpus luteum expulsion is precluded from wide application by the risk of bursal adhesion formation, also that the corpus luteum increases in size till the 16th day of the cycle . Earlier...