How much time needed to burn off a 360-calorie blueberry muffin for a 70 kg, 30-year old women?

66 minutes of lean mowing,

77 minutes of cycling at an easy pace,

92 minutes of vacuuming and

115 minutes of weightlifting.

http://iceycodez.blogspot.com/2009/08/exercising-make-you-fat.html