Your go-to, all-in-one exercise for full-body strength. Ah, planks. Carpenters may think they’re planks of wood and pirates may think they’re balance beams. But anyone who's ever taken a group ...

A 2016 study published in the International Journal of Physiotherapy and Research found that both a 30-day plank workout regimen and a 30-day abdominal challenge — consisting of sit-ups ...