Alterações morfológicas na junção miotendínea do músculo plantar de ratos Wistar submetidos ao protocolo de exercício físico resistido

• Autor(a) principal: Pimentel Neto, Jurandyr [UNESP]
• Data de Publicação: 2018
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/203482; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2019-05-29/000915867.pdf
• topic: Morfologia (Biologia); Músculo esquelético; Ratos Wistar; Exercícios físicos; Sistema musculoesquelético; Musculos; Morfometria

The muscular tissue presents plasticity in relation to different stimuli, this has high capacity for regeneration, and its basic contractile unit denominated sarcomere. The myotendinous junction (MTJ) consists in a highly complex anatomic and specialized where there is a connection between muscle cells and collagen fibrils and represents the largest area of transfer of strength of the locomotor apparatus, besides being considered one of the major areas of predisposition to sports injuries. The resistance exercise promotes functional and metabolic adaptation to the human body, in this way the exercise of vertical ladder with overload will reveal the possible adaptations that occur in the MTJ. The objective of this study was to describe the morphofunctional adaptations in the myotendinous junction of the plantar muscle of rats Wistar rats submitted to exercise. Were used 30 Wistar rats (90 days) were divided into 3 groups: Control (C): not subject to protocols; Training (T): submitted to the protocol without overload; Resistance Training (RT): submitted to the protocol with overload. The trainings were divided into 24 sessions, performed 3x/week, we used the vertical ladder where the animals underwent 9 climbing in T Group without adding overload and in RT Group of 4 to 9 climbing with addition of overload in 3 attempts by climbing. For functional analysis were recorded the movements performed and the time for climbing. A test of maximum load capacity was performed in the periods: Pre and post-protocol RT Group. For microscopic analysis of light were used for the colorations of Hematoxylin-Eosin (HE) and Picro-Sirius (PS). The morphometric analysis of the lengths of the invaginations and sarcoplasmatics evaginations from MTJ was performed from the images of transmission electron microscopy. In this way it was possible to demonstrate the functional improvement, mainly from the RT Group which increased their strength in 95.6% (CMC) and test their...