Try this treadmill workout: Walk or jog on an incline for five to 10 minutes. Maintain a jog for another five to 10 minutes, then pick your pace up again and start running. "This doesn't have to be an all-out sprint," says Penfold, but you should be working hard enough that you can't carry a conversation. Spend five minutes running, then drop your pace back down to a jog. Continue alternating with five to 10 minutes of jogging and five to 10 minutes of running for 30 to 45 minutes.
Cut back on calories. The most important part of losing weight is not working out until you collapse — it's your diet. If you burn 500 to 750 more calories than what you eat every day, you will lose 1–2 pounds every week (any more than that is considered unsafe weight loss). There are tons of little changes you can make to cut calories from your diet, from replacing high-calorie dressings with vinaigrette and asking for all dressings/sauces served on the side, eating at the table instead of in front of the tv, skipping cheese and other fatty additions to your salads and meals, using smaller plates, leave off the whipped cream on your coffee drink, and on and on.