If you stay sedentary, continuously creeping glucose readings can raise your risk of heart disease and diabetes, says study coauthor James Thyfault, PhD, of the University of Missouri. But after 5 days of slothfulness, your post-meal blood sugar levels remain elevated instead, according to a recent study in the journal Medicine & Science in Sports & Exercise. Normally, your blood glucose rises after you eat, then drops as your muscles and other tissues suck up the sugar they need for energy.
