Barre's tiny up-an-inch, down-an-inch pulses, tucks & squeezes (AKA isometric movements) are designed to work muscles to fatigue. That muscle is supposed to shake, burn & want to fail as we are asking it to tone & change.
Each class targets the largest muscle groups (thighs & glutes on repeat). The larger the muscle, the more calories burned. But more important than pounds lost, barre helps redistribute inches on your body through building lean muscle... Making you appear (and feel) longer & leaner.
This lean muscle helps produce energy & burn calories all day long (in & out of the studio). Who doesn't want that?