8 Great Workout DVDs to Try Now

The Calorie CrusherBob Harper: The Skinny Rules Series ($30; mytrainerbob.com)Best for: Advanced exercisers looking to get their butts kicked. http://www.youtube.com/watch?v=9Ju0jNV79Xk - http://www.youtube.com/watch?v=9Ju0jNV79Xk - What it is: Named after his book of the same name, The Biggest Loser's Bob Harper offers a three-disk series, each with four workouts, centered on his get-fit approaches: cardio, core and strength. Expect high-intensity combo moves, such as burpees and overhead presses with squats, along with exercises like side planks, which fire up your fat-burning furnace. (You'll need weights.) http://liveexercise.com/ - http://liveexercise.com/ - Testers' take: Our reviewers found the moves lacking in creativity but very effective. Plus, "he packs a lot into 15 minutes," one said.