Perform this workout anytime, anywhere.

If you have 10 minutes to spare, you have enough time to tackle this effective core workout that puts you through two rounds of fast-paced exercises to target your upper and lower abs.

Forget endless crunches. Fitness experts say a short, equipment-free routine can effectively target your abs, obliques, and deep core muscles in just 10 minutes.

Add Yahoo as a preferred source to see more of our stories on Google. Summer is right around the corner, and if you're looking for a challenge—and a six-pack—Jeff Cavaliere, C.S.C.S., of Athlean-X has ...

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