Impaired Isometric, Concentric, and Eccentric Rate of Torque Development at the Hip and Knee in Patellofemoral Pain

Author(s)

Ferreira, Amanda S. ^[1] ; Silva, Danilo de Oliveira ^{[1, 2]} ; Barton, Christian J. ^[2] ; Briani, V, Ronaldo ; Taborda, Bianca ^[3] ; Pazzinatto, Marcella F. ^{[2, 3]} ; de Azevedo, Fabio M. ^[3]

Affiliation

^[1] Sao Paulo State Univ UNESP, Sch Sci & Technol, Lab Biomech & Motor Control LABCOM, President Prudente, SP - Brazil

^[2] La Trobe Univ, La Trobe Sports & Exercise Med Res Ctr LASEM, Sch Allied Hlth, Physiotherapy Dept, Bundoora, Vic - Australia

^[3] Briani, Ronaldo, V, Sao Paulo State Univ UNESP, Sch Sci & Technol, Lab Biomech & Motor Control LABCOM, President Prudente, SP - Brazil

• Document type: Journal article
• Source: JOURNAL OF STRENGTH AND CONDITIONING RESEARCH; v. 35, n. 9, p. 2492-2497, SEP 2021.
• Web of Science Citations: 5

Abstract

Ferreira, AS, de Oliveira Silva, D, Barton, CJ, Briani, RV, Taborda, B, Pazzinatto, MF, and de Azevedo, FM. Impaired isometric, concentric, and eccentric rate of torque development at the hip and knee in patellofemoral pain. J Strength Cond Res 35(9): 2492-2497, 2021-The aims of this study were to compare maximal muscle strength and rate of torque development (RTD) of knee extensor and hip abductor during isometric, concentric, and eccentric contractions between women with and without patellofemoral pain (PFP). Thirty-eight women with PFP (PFPG) and 38 pain-free women (CG) participated in this study. Isometric, concentric, and eccentric maximal torque and RTD of knee extensor and hip abductor were assessed using an isokinetic dynamometer. Rate of torque development was calculated as the change in torque over the change in time from torque onset to 30, 60, and 90% of the maximal torque (RTD30%, RTD60%, and RTD90%) during isometric, concentric, and eccentric contractions. PFPG had lower isometric, concentric, and eccentric knee extensor maximal torque (29.9, 28.3, and 26.7%) compared with the CG. For knee extensor RTD, PFPG had slower isometric RTD30% (17.8%), RTD60% (21.5%), and RTD90% (23.4%); slower concentric RTD30% (35.7%), RTD60% (29.3%), and RTD90% (28.2%); and slower eccentric RTD30% (20.5%), RTD60% (25.2%), and RTD90% (22.5%) compared with the CG. PFPG had lower isometric, concentric, and eccentric hip abductor maximal torque (28.3, 21.8, and 17%) compared with the CG. For hip abductor RTD, PFPG had slower isometric RTD30% (32.6%), RTD60% (31.1%), and RTD90% (25.4%); slower concentric RTD90% (11.5%); and slower eccentric RTD30% (19.8%), RTD60% (26.4%), and RTD90% (24%) compared with the CG. In conclusion, women with PFP presented deficits in both maximal strength and RTD of knee extensor and hip abductor during isometric, concentric, and eccentric contractions, which highlight the potential importance of addressing different aspects of muscle function through exercise therapy. (AU)

• FAPESP's process: 15/11534-1 - INFLUENCE OF PAIN IN THE ANALYSIS OF PROXIMAL, LOCAL AND DISTAL KINEMATIC PARAMETERS IN FEMALES WITH PATELLOFEMORAL PAIN DURING STAIR ASCENT AND DESCENT
• Grantee: Danilo de Oliveira Silva
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 16/02357-1 - Analysis of the hip torque and kinematics of the femur and rearfoot considering the ascending and descending theories as causal factors of patellofemoral pain
• Grantee: Amanda Schenatto Ferreira
• Support Opportunities: Scholarships in Brazil - Master