Cathe Friedrich's X10 DVD

Five short-but-tough programs that each feature a different fitness technique. Now it's easy to get a challenging workout on even your busiest days. The first three programs have a similar format — they all begin with pure aerobics and end with pure toning. But the cardio is different — step in the first, low-impact in the second and very high-impact in the third. The toning in all three workouts emphasizes time-efficient, multi-muscle exercises (e.g. upper-body overhead presses while doing lower-body lunges). The fourth program is super-intense cardio — plyo-jacks and just plain "jump as high as you can" moves. The final workout is classic aero/tone intervals. Note: The warm-ups and cooldowns are repeated in every program.

Requires 5 to 10 lb. dumbbells; gliding discs are used in one series. ©2013.

X10 contains short, high-intensity cardio segments that – when combined with the warm up and cool down – will give you five calorie-crushing workouts that can each be done in less than 30 minutes. Feeling like you want more? No problem! Just do as many (or all) of the five X10 workouts that you desire. It’s that easy – or is it?!

The twelve X10 premixes range from about 37 minutes to slightly over 77 minutes. This means you can select a variety of X10 workouts to fit the time, schedule, and intensity level you’re looking for. It also means that as your fitness level improves, you’ll have the option of selecting longer premixes to continually challenge your body in new ways.