Take your HIIT workout to the next level with this super-Tabata sweat sesh from Equinox trainer Raneir Pollard [1]. He plays with the interval lengths to keep you on your feet — metaphorically, since there's a serious push-up Tabata round in the middle of this half-hour workout. Some intervals are the traditional 20 seconds of work with 10 seconds of rest, and some are 40 seconds of work with a longer 20-second rest period. That's where it gets super! Grab a pair of medium hand weights and get ready for a challenge!

Credits: On Anna: Cotton On Body shirt [2], Sweaty Betty tights [3], and APL (Athletic Propulsion Labs) shoes [4]; On Brittany: Parks Project shirt [5], Mission by Serena Williams tights [6], and APL (Athletic Propulsion Labs) shoes [7]; On Raneir: Rhone shorts [8] and Nike shoes [9]