SUMMARY
Background. Rheumatoid Arthritis (RA) is characterized by progressive joint destruction due to an inflammatory, degenerative condition of the joint cartilage and adjacent muscles, impairing the patient’s functional status. Resistance exercise is considered a good tool in the management of RA. The objective of this study was to evaluate the effect of resistance exercise, in an aquatic environment, on strength, motor control, and morphometric parameters of the rectus femoris muscle and knee joint of rats submitted to a model of RA.
Methods. Forty male rats divided into four groups were used: CON (Control); RA (Injury Group); EX (Exercise Group) and EXRA (Injury Group treated with resistance exercise in aquatic environment). RA was induced by immunization at the base of the tail and intra-articular injection of Freund’s Complete Adjuvant (CFA) in the tibio-femoral joint of the right knee. The exercise protocol was performed three times a week in a water tank with an overload of 50% of the animal’s weight for 22 days, progressing the number of sets and repetitions every three treatments. Both pelvic limbs were evaluated for grip, motor control in the inclined plane, joint and muscle morphology, and their respective morphological measurements. Generalized Linear Models with LSD post-test was used for statistical analysis.
Results. There was a reduction in strength of both pelvic limbs of the injured animals and the AR and EXRA groups also had morphological changes in the joint and in the rectus femoris muscle. The resistance exercise protocol in an aquatic environment
helped to maintain strength and the quality of histological tissues.
Conclusions. Resistance exercise in aquatic environment promoted functional and muscle tissue improvement in the knee joint of Wistar rats with RA with experimentally
induced RA.
Therapeutic Effect of Aquatic Resistance Exercise on Rectus Femoris and Knee in a Model of Rheumatoid Arthritis
A. L. de Freitas Tavares, M. Neves, T. C. Schnauffer, L. de Araújo Pradal, T. Stein da Silva Leal, L. de Fátima Chasko Ribeiro, G. R. Flor Bertolini
Original Article, 267-278
Keywords: Autoimmune diseases, hydrotherapy, musculoskeletal, physical exercise, rheumatoid arthritis,
Table of Content: Vol. 12 (No.3) 2022 July/September
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