Warmup: Walk/jog for around 3-5 minutes until your heartrate is around 120-130 (you can feel you’re working hard, and your breath may be coming a little quicker, but you could still yodel if someone asked you to.)
Sprints:
- 30 second sprints aiming to get your heartrate up to 160s-180s as fast as possible and keep it there for the duration. If you don’t have a way to monitor your heartrate, this is where you’re gasping for breath and couldn’t talk to anyone if you tried. After the first few, you should start to feel that lactic acid burn in your muscles during the last ten seconds.
- Active rest (meaning jogging, not walking) for 60 seconds between sprints and focus on getting your heartrate down: close your eyes and take deep breaths, but keep moving. You want your heartrate to drop to the 120-140 range (out of breath, but can still carry on a conversation), so you can push hard again. Mostly, I just say screw it, and stay in the 150s.
- After the first 5 or 8 or 12 sprints, increase the rest to 90 seconds between sprints.
Cooldown: Jog/walk for 5 minutes.
Postworkout: This is an anaerobic workout, so it burns primarily sugar. Make sure to have something with natural sugar/real sugar as soon as possible afterwards. At least within 30 minutes. If you don’t, you could spiral into a blood sugar crash, which will cause you to consume way more calories than you just burnt off. Sadly, this doesn’t mean a snickers bar–it means an apple, or a protein shake with fruit. You want sugar, not a blood sugar spike.
Other points:
- They tell me that this workout is intended specifically for fat loss. Personally, I think if you want to burn fat, you should just burn more calories than you consume, period.
- The idea is to get a metabolic boost from this workout, so you burn more calories throughout the day. So it’s best done in the morning to give your body the most time to burn the most calories.
- In order to get the metabolic boost, you have to work really freaking hard. Signs of metabolic boost include: heartrate of 160-170 during the first half of the intervals, and above 170 for the second half. (Heartrates are very individual, so these are just guidelines.) Other signs include nausea, slight dizziness or headache, a ringing in the ears and a flushed face. I told you this was fun. No, seriously. Because when you work that hard, your body also releases testosterone, endorphins, and growth hormones. It’s a pretty cool high.
- You should also be in reasonable shape. This isn’t a beginner’s workout.
- It’s best done after weight training, so you’re not exhausted when you go to lift.
- Don’t do it everyday. It’s an intense workout, give your body time to recover.
- In case of injury, it’s perfectly adaptable to the machines in the gym. I use the precor machine, but other folks love the arc trainer.