Stop wasting time on crunches and start training your core to resist movement for maximum power and injury prevention.

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. Do you want a strong ...

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Ab rollers is one of the easiest home fitness tools to build your core strength, improve your posture, and help you get ...

At first glance, the ab wheel may look like an innocent—and perhaps even fun—gym accessory. Yet in practice? It’s an advanced tool that delivers a seriously intense, next-level core challenge. For ...

Today's ab routines are more versatile than ever. Sure, you can slog through sets of situps and rounds of planks over and over again. But, more and more, core workouts incorporate tools like Swiss ...