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Habit: Skipping the Gym When You're Short on Time
Good News: You can work out less—if you move more. In one 2013 study, people who stood for a total of two hours and walked for four hours daily had greater insulin sensitivity (which reduces the risk of diabetes and heart disease) than people who completed an intense workout for one hour but were mostly sedentary for the other 23. This may be because muscle contractions from more sustained movement stimulate the production of an enzyme that helps regulate glucose.