Efeitos do exercício físico e da interrupção do comportamento sedentário sobre parâmetros cardiometabólicos em adultos inativos: um ensaio cruzado

• Ano de defesa: 2018
• Autor(a) principal: Assis, Yuri Alberto Freire de
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Brasil; UFRN; PROGRAMA DE PÓS-GRADUAÇÃO EM EDUCAÇÃO FÍSICA
• Palavras-chave em Português: Comportamento sedentário; Treinamento intervalado de alta intensidade; Caminhada; Saúde cardiometabólica; Sobrepeso; Síndrome metabólica; CNPQ::CIENCIAS DA SAUDE::EDUCACAO FISICA
• Link de acesso: https://repositorio.ufrn.br/jspui/handle/123456789/25180

INTRODUCTION: The sedentary behavior is associated with a higher risk for cardiometabolic disturbances, such as metabolic syndrome (MS). The current recommendations on physical activity for health have been suggested the reduction of sedentary behavior and regular moderate-vigorous exercise. However, less is known on the isolated effects of breaking up sedentary behavior and physical exercise on the parameters of MS during a sedentary day in adults with body fat excess. OBJECTIVE: To analyze the effects of regular breaking up sedentary behavior and vigorous exercise on blood pressure, glucose, and triglycerides in adults with body fat excess. METHODS: A randomized controlled trial with a crossover design was conducted involving 25 inactive adults with body fat excess (10 males; 24.4 ± 3.8 years; % body fat 34.5 ± 6.0%; 4.699 ± 1.962 steps per day). All participants were submitted into three experimental sessions of 10 h with one-week interval: i) SED session, high sedentary behavior during the day; ii) EX+SED session, vigorous exercise followed by a high sedentary behavior during the day; iii) ACTIVE session, regular breaking up sedentary behavior during the day (five minutes of walking every 20 minutes). Standardized meals were offered during all experimental sessions. Blood pressure, glucose and triglycerides were measured over the day during the experimental sessions. The area under the curve (AUC) of blood pressure, glucose and triglycerides was calculated and the comparison between the sessions was performed using the generalized linear mixed models with a statistical significance set at 5%. RESULTS: The AUC of glucose was lower in the ACTIVE session [W(2) = 6.180, p = 0.046] compared to the SED session (p = 0.015). The AUC of diastolic blood pressure was lower in the ACTIVE session [W(2) = 6.119, p = 0.047] compared to the SED session (p = 0.029) and the EX+SED session (p = 0.035). There was no difference in the triglycerides and systolic and mean blood pressure among the experimental sessions. CONCLUSION: The regular breaking up sedentary behavior reduced the diastolic blood pressure and glucose in inactive adults with body fat excess during a day of high sedentary behavior, while the vigorous exercise did not change the cardiometabolic parameters analyzed. Therefore, the regular breaking up sedentary behavior should be encouraged to attenuate the cardiometabolic risk of inactive adults with body fat excess who spend a high amount of time sitting over a day.