During the lockdown, many celebrities adapted their workout routines to fit the spaces available at home. This shift was embraced by stars like the Kardashian-Jenner sisters, who already had ...

Emily Strohm is a Senior Editor at PEOPLE. She has been at PEOPLE for 11 years and has written nearly 40 cover stories for the magazine. What Is it: Rumble is HIIT (High Intensity Interval ...