(ICYMI,Bell just got real about easing back into workouts after a slump.)

When used in tandem, you might work muscles you probably never even knew you had.

“By the end, you’re basically shaking and falling off the machine.”

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Photo: Getty Images

Looking for other ways to get the same burn as Bell?

Trythis at-home Pilates workoutthat’s perfect for when you’ve been sitting all day.