Treadmill - 15% incline @ 3 mph

This activity burns approximately 618 calories per hour

If you're comfortable walking indoors at a 3-mph pace but would like to add some ÒhillsÓ to your treadmill workout, begin slowly. After a warm-up of 5 to 10 minutes, gradually add a 1 to 2% elevation to the treadmill every 5 minutes until you reach 15%. You'll find that walking with a 15% grade will challenge you and build your aerobic fitness capacity.