Efeito do exercício resistido na redução do edema, nocicepção e regeneração nervosa em um modelo de compressão do nervo isquiático

Abstract

Este artigo está licenciado sob forma de uma licença Creative Commons Atribuição 4.0 Internacional, que permite uso irrestrito, distribuição e reprodução em qualquer meio, desde que a publicação original seja corretamente citada. ABSTRACT Aims:To analyze the effects of ladder-climbing resistance training exercise on edema, nociception, and regeneration of the sciatic nerve in Wistar rats subjected to sciatic nerve compression. Methods: Twenty-four Wistar rats were divided into four groups: Control Group, Exercise Group, Injury Group, and Treated Group (injury and exercise). Injury Group and Treated Group were subjected to sciatic nerve compression with a hemostat for 30 seconds. On the third day after injury, Exercise Group and Treated Group began treatment with ladder-climbing resistance exercise. The treatment consisted in performing two series of 10 ladder climbs with a 100-gram overload and a one-minute interval between the series. The study was conducted for 22 days, during which time the animals were evaluated for edema and nociception. Twenty-two days after surgery, the animals were anesthetized for removal of a sciatic nerve fragment and analysis of the number of axons and fiber density. Thereafter, still under anesthesia, the animals were euthanized. Nerve sampling followed the routine histological processing protocol. Expressions of Neural Growth Factor and Brain-derived Neurotrophic Factor were evaluated by Western blotting.Results: There was no significant difference in edema size between groups. Control Group showed the highest nociceptive threshold compared to the other groups. The morphometric analysis showed no significant difference in number of axons and fiber density between groups. The expression of Brain-derived Neurotrophic Factor was greater in the Injury Group and the Treated Group compared to the Control Group. Conclusions:The proposed ladder-climbing resistance training was not effective in reducing edema and nociception or in increasing the number of axons and fiber density after sciatic nerve injury.

Effect of Type and Dose of Exercise on Neuropathic Pain After Experimental Sciatic Nerve Injury: A Preclinical Systematic Review and Meta-Analysis

“…It should be noted though that subgroup differences were not significant and whereas 16 studies could be analysed for treadmill running [6][7][8]11,26,27,[30][31][32]39,43,56,57,67,69,75 only five articles could be meta-analysed for for swimming 1,13,14,18,36 and three for other types of exercise. 2,14,41 These small numbers for swimming and 'other exercises' prevent firm conclusions. Guo et al 19 also did not find one type of exercise superior to the other, in a systematic review limited to rat models.…”