What is the best exercise to lose weight?

Aerobic: Any exercise that gets your heart rate up will increase your metabolism of food. Fast walking, jogging, dance class (like zumba), swimming, and biking are some of the ways to do this. Most important---choose something that's fun, so you'll want to do it regularly!

Agree w Dr. Caplin: Mix it up!! Engage in regular aerobic exercise (i.e. running, swimming, Nordic track, bicycling, kickboxing, walking, cross country skiing, hiking, etc.) Do both cardio & weight training. You can mix & match different kinds of exercise. This site helps determine calories burned for > 100 activities: http://www.prohealth.com/weightloss/tools/exercise/calculator1_2.cfm

The one you enjoy!: The best exercises to do for weight loss are the ones you look forward to. Walking, bikeing, swimming, tennis, handball, raquetball, etc are all good ways to get exercise. Always start slow if you are new to exercise and build up your endurance over time. Make sure to stretch before and after any exercise.