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Master the ab wheel rollout with our step-by-step guide to proper form, expert cues, and building a bulletproof midsection. If you’ve spent any real time in the gym, you’ve probably seen the ab roller ...

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

If you want to work your abs, you’ll probably default to sit-ups, planks or crunches. They sure are effective, but celebrity trainer Ben Bruno, who’s worked with the likes of Justin Timberlake and ...