Question: how many calories do you burn on a treadmill at 3.5 mph?
Answer: For those looking for more intense calorie burn, a 160 lb person can increase the treadmill speed to 3.5 MPH to burn about 310 calories an hour. A 200 lb person will burn about 250 calories an hour while using a treadmill desk pace of 2 MPH and about 390 calories an hour while setting the pace to 3.5 MPH.