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H.I.I.T, or high-intensity interval training is exactly what it sounds like it is: intervals of high-intensity aerobic exercise with alternating periods of rest/recovery. This method of training has received a lot of attention in recent years because it burns calories like crazy. (Perry et al. 2008) It is also another way you can shake up your workout, especially if you’ve noticed your results plateauing.
How it works:
As you might guess by the words, “high intensity,” the exercise interval portion, or “work,” is at a level comparable to an 8 or 9 on a 10pt Perceived Exertion Scale (RPE), or, 90-95% of max heart rate. The intervals range between 1-4 minutes with periods of recovery in between each interval.
There are many ways to skin this cat…you could do intervals at a ratio of 1:1 (1 min or work, 1 min of rest); 2:1 (2 min of work, 1 min or rest); 3:1 (3 min of work, 1 min of rest)…you get the idea. There truly is no “right” or “wrong” way to go about interval training.
Mode of exercise: You can use any form of cardiovascular activity that appeals to you. Running, stair climbing, cycling, swimming, even jogging in place, as long as the intensity in your routine is high and can be sustained for the given number of minutes.
Time: Again, there is no hard and fast rule for length of time, though the more intervals you do, the more calories you’ll burn. 30-60 mins is probably a good range.
Rest: During the recovery periods it is important to keep moving, just lower the intensity to 40-60% of max heart rate.
Cool down: Include a 5-10 minute cool down period after this workout (you’ll need it!)
Benefits: Improved ability to oxidize fat!
A heart rate monitor would be extremely helpful during this workout to track heart rate and calories burned.

* Note: Blue Sky Gym and the author disclaim any liability for any injury, physical or emotional, suffered during or as a result of exercise or activities recommended. As always, you should use common sense and consult your health professional before beginning any exercise routine or program.