If you're trying to lose weight or keep better track of your calorie intake and how many calories you're burning, fitness trackers can be great.

Activity trackers can provide a good overall estimate of calories burned, but a new study finds they're less accurate when measuring certain activities, such as strength training.

Listen in as John Higgins, MD, shares why your activity tracker could be great for monitoring certain activities, but not strength training. He also discusses if there is a way to accurately measure your activity level during strength training.