Treinamento resistido e sistema endócrino: revisão de literatura

Abstract

Resistance training has demonstrated efficacy in the addition and conditioning of muscle strength due to improvements in neuromuscular aspects, body composition, tolerance to metabolic disturbances and endocrine aspects. There are a number of endocrine changes caused by resistance exercise. However, few studies present a joint relationship of the hormonal response to resistance exercise. Thus, the objective of this study was to propose a description, through a literature review, of the response of testosterone, GH, IGF-1 and cortisol caused by resistance exercise. The present study was a bibliographical review, carried out in the database of Scielo, Google academic, PubMed, covering national and international works. As inclusion criterion, an analysis was performed to verify the studies that presented a direct relation of the title and abstract with the theme of the work proposed here. Adrenergic excitation and increased blood lactate. concentration promote release of testosterone and GH. IGF-1 is mediated by GH in hepatic cells and possibly by other non-GH dependent pathways. Insulin secretion is related to the availability of blood glucose, having an anabolic role in the muscle through mTOR activity. Cortisol secretion is related to the reduction of plasma volume and increases in lactate levels. It is concluded that the different dimensions of RT as intensity, volume (number of series and repetitions), type of muscular action (concentric, eccentric, isometric), adrenergic response, plasma volume and lactate production interfere directly with plasma hormone concentrations especially in acute responses to exercise.