Does fasting work for healthy weight loss?
Abstract
Introduction: The main disease that affects a large part of the global population is obesity and it has been the cause of other health problems such as diabetes mellitus, acute myocardial infarction, some types of cancer and several other comorbidities. A reduction in body weight is strongly associated with improved health. A program in which individuals engage in physical activity can prevent or even reduce the risk of high blood pressure in overweight individuals. The fasting strategy can short-term reduce up to 7% of total body weight, as well as improve several other blood parameters. Objective: to analyze the effects of the practice of physical exercises performed with the food fasting strategy and see if it is possible to have a healthy weight loss. Materials and Methods: this is literature review, where databases such as PubMed, Scielo, Lilacs, Medline and academic works such as theses and dissertations were used as search sources for scientific articles. The selection of articles and works followed the criterion of 10 years of publication, being 2010 and 2020, where English, Portuguese and Spanish were the languages composed. Conclusion: fasting exercises can promote several health benefits, such as improved lipid profile, improved blood glucose and reduced risk for chronic non-communicable diseases, such as acute infarction and atherosclerosis. However, as observed by studies by several researchers, exercises performed in a fed situation, in many cases, can promote greater lipolysis and fat oxidation when compared to those performed on an empty stomach. Thus, for the purposes of healthy weight loss, depending on the intensity of exercise, it may be preferable to ingest a light pre-training meal, aiming at reducing muscle glycogen depletion and better utilization of fat as the main energy substrate.
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