Clinical journal of sport medicine : official journal of the Canadian Academy of Sport Medicine · 2020
Jumper's Knee: A Prospective Evaluation of Risk Factors in Volleyball Players Using a Novel Measure of Injury.
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MacDonald Kerry, Palacios-Derflingher Luz, Kenny Sarah, Emery Carolyn, Meeuwisse Willem H
Аннотация
OBJECTIVES: To examine potential intrinsic risk factors that may contribute to the onset of jumper's knee in elite level-male volleyball players.
DESIGN: Prospective Cohort Study.
SETTING: Varsity and National team volleyball gymnasiums.
PARTICIPANTS: Sixty elite adult male volleyball players from Canada.
ASSESSMENT OF RISK FACTORS: Players completed a series of risk factor assessments at the commencement of their seasons, including vertical jump (cm), ankle dorsiflexion range (degrees), dynamic balance (normalized distance reached; cm), dynamic knee alignment (degrees), and landing mechanics (degrees).
MAIN OUTCOME MEASURE: Self-reported knee problems, captured via short message service.
RESULTS: Knee problem prevalence was 75% [95% confidence intervals (CIs): 62.2-84.6] and the incidence rate for substantial injuries over the study period was 30 injuries/100 players/season (95% CI: 19.5-43.1). No risk factor was found to significantly predict the future occurrence of developing jumper's knee. The odds ratios were close to unity (range: 0.94-1.07) with narrow confidence intervals and P > 0.05.
CONCLUSIONS: A more sensitive capture of overuse knee problems did not result in the identification of distinct risk factors for the development of jumper's knee. These findings highlight a lack of available methodology to accurately assess risk factors for overuse injuries.
DESIGN: Prospective Cohort Study.
SETTING: Varsity and National team volleyball gymnasiums.
PARTICIPANTS: Sixty elite adult male volleyball players from Canada.
ASSESSMENT OF RISK FACTORS: Players completed a series of risk factor assessments at the commencement of their seasons, including vertical jump (cm), ankle dorsiflexion range (degrees), dynamic balance (normalized distance reached; cm), dynamic knee alignment (degrees), and landing mechanics (degrees).
MAIN OUTCOME MEASURE: Self-reported knee problems, captured via short message service.
RESULTS: Knee problem prevalence was 75% [95% confidence intervals (CIs): 62.2-84.6] and the incidence rate for substantial injuries over the study period was 30 injuries/100 players/season (95% CI: 19.5-43.1). No risk factor was found to significantly predict the future occurrence of developing jumper's knee. The odds ratios were close to unity (range: 0.94-1.07) with narrow confidence intervals and P > 0.05.
CONCLUSIONS: A more sensitive capture of overuse knee problems did not result in the identification of distinct risk factors for the development of jumper's knee. These findings highlight a lack of available methodology to accurately assess risk factors for overuse injuries.