Doug Salomon
It's from Men's Health magazine, bit don't let that dissuade you from trying it. There's nothing exclusively "manly" about it.
Aquí les dejo un reto de plancha de 30 días bastante bueno que hice hace poco. https://www.menshealth.com/fitness/a35856218/30-day-plank-challenge/
Comienza siendo bastante fácil, pero termina siendo bastante difícil.