Resistance exercise recovers the structure of cartilage and synovial membrane of the ankle joint of rats after sciatic compression

Vieira, Lizyana; Lovison, Keli; Kunz, Regina Inês; Antunes, Juliana Sobral; Bertolini, Gladson Ricardo Flôr; Brancalhão, Rose Meire Costa; Ribeiro, Lucinéia de Fátima Chasko

doi:10.1590/s1980-6574201700030001

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“…In the study of Vieira et al (44), the effect of resistance exercise in stair climbing (five days a week, three weeks, and overload of 100 g) on morphological parameters of the ankle joint of Wistar rats submitted to a model of sciatic pain was observed. The groups that suffered nerve damage showed an increase in the number of chondrocytes, which was justified by a possible hypertrophy due to exercise or due to joint kinematics, since the weight load on the pelvic limb was altered.…”

Section: Discussionmentioning

confidence: 99%

Therapeutic Effect of Aquatic Resistance Exercise on Rectus Femoris and Knee in a Model of Rheumatoid Arthritis

Tavares¹,

Neves²,

Schnauffer³

et al. 2022

Muscle Ligaments and Tendons J

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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.

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Section: Discussionmentioning

confidence: 99%