Deadlock is an isometric and isotonic workout that helps create better joint stability, a stronger core and really powerful glutes and hips. The exercises are designed to be executed slowly, allowing the muscles to contract through their entire length, when contracting and holding the position in isometric tension when holding. Keep your breathing nice and even throughout and you'll soon get into the sweatzone anyway as muscle temperature rises. Go for EC on this one, you know you want to.
Extra Credit: Whole sequence (set) non-stop, no breaks & no dropping on your knees during push-ups or planks.