Tone your abs with this highly effective super Tabata workout from Equinox trainer Raneir Pollard [1]. He plays around with the length of the intervals to truly push your core. And be forewarned: he's also a comedian, so laughing is part of this workout, too.

Credits: On Raneir: Under Armour shirt [2], Rhone shorts, [3] and Nike shoes [4]. Manduka mats [5].