A tabata is a particular kind of high intensity interval training, in which you work a pair of exercises for 20 seconds at a time, with a 10 second rest between them, for a total of 4 minutes. One slice of a tabata workout might look like: 00:00 – 00:20: Pushups 00:20 – 00:30: Rest 00:30 – 00:50: Squats 00:50 – 01:00: Rest You’d repeat that four times, for a total of 8 units of hard work. If you can get the intensity right (which is difficult), it’s one hell of a workout. The way I’ve done them as part of SexyShred has been three sets of the 4 minute…