Equinox [1] group fitness instructor Raneir Pollard [2] is back with an advanced HIIT workout that will challenge every major muscle in your body and then some. This 30-minute workout consists of five rounds of Tabata-inspired intervals, with periods of work that last between 40 and 20 seconds. Don't worry — he lets you rest some, too. With moves like the single-leg burpee and single-leg hip thrust, Raneir makes sure you work both sides of your body equally, and you will definitely get a killer booty burn! No equipment is needed, so no excuses not to try this HIIT workout! We promise Raneir will have you laughing through the burn.

Credits: On Allie: Reebok tank [3] and Nux Active leggings [4]. On Raneir: Rhone shorts [5] and Nike shoes [6]. On Tarra: Lorna Jane top [7], 2XU tights [8], and Reebok shoes [9]. Manduka mats [10].