Estudo sobre o efeito agudo decorrente da exposição ao comportamento sedentário prolongado em jovens adultos

Abstract

This work is a study on the possible acute effects on the body of a person who is excessively exposed to prolonged sedentary behavior, consisting of two articles. The first article is an integrative review of the literature and its main objective is to analyze outcome variables, instruments, time of exposure and intervention used in studies that measure acute changes in prolonged sedentary behavior. After the selection process, 23 studies were analyzed, of which glucose, insulin, blood pressure and blood flow stand out as the main outcome variables for the study of sedentary behavior, measured by instruments such as blood samples, sphygmomanometer, doppler ultrasound, among others. Regarding the protocols used for these studies, there is a lack of standardization for them, in addition to the scarcity of studies that specifically focus on acute physiological changes resulting from sedentary behavior itself, making the assessment more complex. and measuring these effects on the individual's body. The second article is an experimental study with the objective of determining the occurrence and period of acute changes in blood flow, mean arterial pressure and myoelectric activity during induced prolonged sedentary behavior. Participants were 21 healthy adults (22.5 ± 1.60 years) who performed a 3-hour protocol of uninterrupted sedentary behavior in which information was collected every 20 minutes on infrared thermography, mean arterial pressure and myoelectric activity. A reduction in the evaluated temperature was observed, indicating a possible reduction in blood flow, a change in the myoelectric signal indicative of muscular fatigue, in addition to an increase in mean arterial pressure over the 3 hours of sitting protocol. Therefore, it can be inferred that interventions to interrupt sedentary behavior before these changes, somewhere between 40 and 60 minutes, would be interesting to mitigate the effects of sedentary behavior. With the information from each article, analyzed together, it is possible to have a greater understanding of sedentary behavior and offer more support for both new research and clinical practice.