Danilo de Oliveira Silva1, Christian Barton2, Kay Crossley2, Marina Waiteman3, Bianca Taborda3, Amanda Schenatto Ferreira3, Fábio Mícolis de Azevedo3. 1. Laboratory of Biomechanics and Motor Control, School of Science and Technology, São Paulo State University (UNESP), Presidente Prudente, Brazil; La Trobe Sports and Exercise Medicine Research Centre (LASEM), School of Allied Health, La Trobe University, Bundoora, Victoria, Australia. Electronic address: danilo110190@hotmail.com. 2. La Trobe Sports and Exercise Medicine Research Centre (LASEM), School of Allied Health, La Trobe University, Bundoora, Victoria, Australia. 3. Laboratory of Biomechanics and Motor Control, School of Science and Technology, São Paulo State University (UNESP), Presidente Prudente, Brazil.
Abstract
OBJECTIVES: Compare anthropometric characteristics, function, kinesiophobia, catastrophism and knee extensor strength between women (i) with PFP and crepitus (PFPcrepitus); (ii) with PFP and no crepitus (PFPNOcrepitus); (iii) without PFP and crepitus (Pain-freecrepitus); and (iv) without PFP and no crepitus (Pain-freeNOcrepitus). DESIGN: Cross-sectional. SETTING: Laboratory study. PARTICIPANTS: 65 women with PFP and 51 pain-free women. MAIN OUTCOME MEASURES: Objective assessment of knee crepitus, forward step-down and single leg hop tests; knee extensor strength tests; and subjective ratings of function, kinesiophobia, pain catastrophising and knee stiffness. RESULTS: Crepitus was more common in women with PFP (50.7%) compared to those without (33.3%) (χ(1)2=4.17;p=0.031). PFPcrepitus and PFPNOcrepitus groups had lower self-reported function; and higher kinesiophobia, catastrophism and knee stiffness compared to Pain-freecrepitus and Pain-freeNOcrepitus groups (p < 0.001). PFPcrepitus, PFPNOcrepitus and Pain-freecrepitus groups had lower functional performance compared to the Pain-freeNOcrepitus group (p < 0.040). PFPcrepitus and PFPNOcrepitus groups had lower isometric, concentric and eccentric knee extensor strength compared to the Pain-freeNOcrepitus group (p < 0.041), but not the pain-freecrepitus group. PFPcrepitus presented higher BMI than other groups (p = 0.001). CONCLUSION: Kinesiophobia, catastrophism, knee stiffness, strength and physical function are all impaired in women with PFP, regardless of crepitus. In pain-free women, crepitus was associated with poorer objective function.
OBJECTIVES: Compare anthropometric characteristics, function, kinesiophobia, catastrophism and knee extensor strength between women (i) with PFP and crepitus (PFPcrepitus); (ii) with PFP and no crepitus (PFPNOcrepitus); (iii) without PFP and crepitus (Pain-freecrepitus); and (iv) without PFP and no crepitus (Pain-freeNOcrepitus). DESIGN: Cross-sectional. SETTING: Laboratory study. PARTICIPANTS: 65 women with PFP and 51 pain-free women. MAIN OUTCOME MEASURES: Objective assessment of knee crepitus, forward step-down and single leg hop tests; knee extensor strength tests; and subjective ratings of function, kinesiophobia, pain catastrophising and knee stiffness. RESULTS: Crepitus was more common in women with PFP (50.7%) compared to those without (33.3%) (χ(1)2=4.17;p=0.031). PFPcrepitus and PFPNOcrepitus groups had lower self-reported function; and higher kinesiophobia, catastrophism and knee stiffness compared to Pain-freecrepitus and Pain-freeNOcrepitus groups (p < 0.001). PFPcrepitus, PFPNOcrepitus and Pain-freecrepitus groups had lower functional performance compared to the Pain-freeNOcrepitus group (p < 0.040). PFPcrepitus and PFPNOcrepitus groups had lower isometric, concentric and eccentric knee extensor strength compared to the Pain-freeNOcrepitus group (p < 0.041), but not the pain-freecrepitus group. PFPcrepitus presented higher BMI than other groups (p = 0.001). CONCLUSION:Kinesiophobia, catastrophism, knee stiffness, strength and physical function are all impaired in women with PFP, regardless of crepitus. In pain-free women, crepitus was associated with poorer objective function.
Authors: Danilo De Oliveira Silva; Marcella F Pazzinatto; Kay M Crossley; Fabio M Azevedo; Christian J Barton Journal: J Med Internet Res Date: 2020-07-22 Impact factor: 5.428