Arms and abs make a powerful pairing. Lots of the best strength moves recruit muscles in both areas at once, building not just definition but also core stability and upper-body power that carry over into everyday life and other workouts. Add a dumbbell into the mix and you level up the challenge.

Trainer Britany Williams has designed this ab and arm workout to be quick, convenient, and effective. It's the kind of low-maintenance routine you can add to a gym session, but it also works perfectly at home as long as you have access to a dumbbell. If you are unsure what size weight to use, check out our guide to the best adjustable dumbbells. They let you switch up the load without cluttering your space with a whole rack.

The whole thing takes just fifteen minutes, including short rests. Now,

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