Prolonged sitting has been shown to impair metabolism and vascular function. The overall purpose of this study is to determine if breaking up prolonged (9 hours) of sitting with brief (\~20 second) stair climbing exercise "snacks" can improve markers of metabolic control and vascular health in healthy young male participants and in males or females with overweight/obesity who are at risk of insulin resistance. An additional purpose is to determine if saliva insulin can be used as a valid indicator of blood insulin when measured throughout the day in sedentary and active conditions and when diets with different amounts of carbohydrates are consumed.
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Plasma insulin area under the curve
Timeframe: Measured across 9 hours of each intervention day