Fix your mistakes and get the most from a workout with Oprah's fitness guru. Jan. 28, 2010— -- Have you started a new exercise regimen to help you get in shape in the new year? If you're not ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." When life gets busy, it can be hard to squeeze in an endorphin-boosting workout each day (no shame!).