There are no rules for the specific manner in which this is achieved—your child could do this running in the backyard, or using a treadmill, elliptical machine, or recumbent bike (provided your child is old enough to use such machines safely, of course), or they could do it bicycling outdoors. Here are the core principles:
1. Warm up for three minutes
2. Then, go all out, as hard as you can for 30 seconds
3. Recover for 90 seconds
4. Repeat 7 more times, for a total of 8 repetitions
5. Cool down for a few minutes afterwards by cutting down your intensity by 50-80 percent.
For more in-depth information about Sprint 8, please review this previous article.
Know that Sprint 8 exercises have a number of health benefits that you simply cannot achieve with any other type of exercise. For adults over 30, the most important of these is the natural production of human growth hormone (HGH), which is essential for strength, overall fitness, and longevity. Naturally, children and teens don’t need to worry too much about producing HGH, but high-intensity interval training can still provide magnificent benefits for this age group, as it can dramatically improve fat loss and helps build muscle. It also dramatically improves athletic speed and performance, which can greatly benefit aspiring youth athletes.
Overall, Sprint 8 exercises will allow your child (and you!) to achieve her fitness goals much faster.