By Bethany Gumper
Pick up the pace and tackle hills.Steps to Success
Don't be afraid to push yourself -- you can do it! The best way to increase your metabolism is to complete at least two challenging walks per week.
If you need an extra boost, find a fitness buddy to join you on the tougher days -- sweating with a friend can do wonders for waning motivation.The Plan
"Faster walks and varied terrain firm your muscles, boost your fitness level, and burn more calories in less time," says Mark Fenton, author of Pedometer Walking (Lyons Press). Follow these tips for revving up your walks, and you can expect to lose about a pound each week: