Overweight and obesity in young adults with patellofemoral pain: Impact on functional capacity and strength |
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| Institution: | 1. Department of Physiotherapy, School of Science and Technology, Sao Paulo State University (UNESP), Presidente Prudente, 19060-900, Brazil;2. La Trobe Sport and Exercise Medicine Research Centre, School of Allied Health, Human Services and Sport, La Trobe University, Melbourne, VIC 3086, Australia |
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| Abstract: | PurposeThis study aimed to (a) investigate the proportion of overweight/obesity in a cohort of young adults with patellofemoral pain (PFP) and (b) explore the association of body mass index (BMI), body fat, and lean mass with functional capacity and hip and knee strength in people with PFP.MethodsWe included a mixed-sex sample of young adults (18?35 years old) with PFP (n = 100). Measurements for BMI, percentage of body fat, and lean mass (assessed by bioelectrical impedance) were obtained. Functional capacity was assessed by the Anterior Knee Pain Scale, plank test, and single-leg hop test. Strength of the knee extensors, knee flexors, and hip abductors was evaluated isometrically using an isokinetic dynamometer. The proportion of overweight/obesity was calculated based on BMI. The association between BMI, body fat, and lean mass and functional capacity and strength was investigated using partial correlations, followed by hierarchical regression analysis, adjusted for covariates (sex, bilateral pain, and current pain level).ResultsA total of 38% of our cohort had their BMI categorized as overweight/obese. Higher BMI was associated with poor functional capacity (ΔR2 = 0.06?0.12, p ≤ 0.001) and with knee flexion strength only (ΔR2 = 0.04, p = 0.030). Higher body fat was associated with poor functional capacity (ΔR2 = 0.05?0.15, p ≤ 0.015) and reduced strength (ΔR2 = 0.15?0.23, p < 0.001). Lower lean mass was associated with poor functional capacity (ΔR2 = 0.04?0.13, p ≤ 0.032) and reduced strength (ΔR2 = 0.29? 0.31, p < 0.001).ConclusionBMI, body fat, and lean mass should be considered in the assessment and management of young people with PFP because it may be detrimental to function and strength. |
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