Workouts like today's alactic-aerobic session require a lot of energy from your body. Although you're only working for short period of time, you should be pushing your body to its absolute limits. That kind of effort takes calories, so be smart about timing your meals around this workout. Get in enough food 1-2 hours before you train, but not so much that it weighs you down, and make sure you refuel after.
This workout shouldn't take you more than 30 minutes. After that, you're good to go for the rest of the day. Do 10 seconds of work followed by 50 seconds of rest for a total of 18 rounds. Light up your metabolism and get ready to train like an athlete.