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Revista Brasileira de Reumatologia

versão impressa ISSN 0482-5004


BERTOLINI, Gladson Ricardo Flor et al. Swimming training and functional assessment of sciatic nociception in rats. Rev. Bras. Reumatol. [online]. 2011, vol.51, n.3, pp.254-259. ISSN 0482-5004.

INTRODUCTION: The protective effect of exercise on individuals with peripheral neuropathy is controversial. OBJECTIVE: To assess the influence of physical training of moderate and progressive intensity on nociception of rats in an experimental sciatica model. MATERIALS AND METHODS: The study assessed 18 rats divided into the following three groups: control group (CG); low-intensity swimming group (LISG); progressive-time swimming group (PTSG). To meet the physical training protocol, the animals were placed in a water tank for six weeks, three alternate days per week. In LISG group, the animals swam ten minutes per session, and, in PTSG group, the animals began swimming for ten minutes, and had a ten-minute increase per week. In CG group, the animals swam less than one minute per day, only to get used to the water environment. After finishing the swimming training, the experimental sciatica model protocol was started with constrictive ligature of the sciatic nerve with chromic catgut. Nociception was assessed using the functional disability test, which measures, in a one-minute interval, the time during which the animal holds its hind paw (THHP) in a guarded position. Assessments were performed preoperatively, and on the third, sixth, and tenth post-operative (PO) days. RESULTS: All groups showed a significant increase in THHP on third, sixth, and tenth PO days, as compared to preoperative values. In CG, no significant change was observed in PO assessments, unlike what happened in LISG and PTSG groups. CONCLUSION: Exercise produced greater hyperalgesia.

Palavras-chave : exercise; pain measurement; swimming.

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