A trainer says this is the most underrated move for building strength in your core, shoulders, arms and back

Woman in high plank position at home holding dumbbells.

If you’re new to working out, you might not have come across the term compound exercise yet—but there are probably a few already in your routine.

A compound exercise is any movement that recruits multiple muscle groups at once. That means workout staples like squats, deadlifts and chest presses all fall into this category.