“A plank, when done correctly, focuses on the core while utilizing almost every muscle in the body,” Rumsey says. “This includes the rectus abdominis, the obliques, the transverse
Diana Mitrea, NYC-based trainer and co-founder of Stronger With Time, created a quick 10-minute abs workout that works all of your core muscles without including a single plank.
Crunches and planks are effective ab exercises when your form is perfect. But too often the hip flexors, neck, and arms end up working overtime instead of the