Designed to push your biceps and triceps past their limits, this routine has gone viral for how punishing (and effective) it is. But be warned—it’s not for the faint of heart.

Extend your arms to lift the weight back overhead. Stand with your feet hip-width apart, holding dumbbells by your thighs, ...

10 min arms and abs workout with no equipment required. For more workouts and programs, check out my app Core by Chloe Ting ...