I don't believe that sit-ups or crunches are must-haves in any core routine. In fact, I steer away from them in favor of other functional core exercises that build a strong midsection, and this "core ...

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 ...

The plank looks simple, but a well performed plank asks the abdominal wall, hips, shoulders, and back to work together. That ...

Enter any gym, and you'll see the same core workout: crunches, situps, ab machines, and endless twisting exercises. The logic seems obvious—if you want stronger abs, more visible abs, you train them ...

Having strong abs is about much more than fitting a certain aesthetic (although if you do want to brag about having a six- or ...

The best workout videos by burn rate: Which YouTube channels are the most effective? Home-based exercise programs are extremely effective in improving both your physical well-being and overall quality ...