So, the more intense you are, the greater the effect on your body.

And with that, we have a much bigger problem here, so if you're ever going to do HIIT (high-intensity interval training), you really should focus on the volume that you'll be doing, because not only is it important to do the volume so that you can get better (because you can't get better if you're just doing 10 intervals and then you're done, right?) but it's also important to do the intensity so that you can get a bigger effect on your body.

If you're doing high-intensity interval training (where each exercise is doing the same exercises, but instead of doing a particular exercise one, two, three, four times, you're doing those same exercises in a different sort of order), the effect on your body is going to be much bigger because the effect of intensity is much bigger. So, really, the challenge here really is to do as many exercises as you can and as fast as you possibly can. We're so used to doing a lot of things in a time frame where you're just going to do them for a set amount of time that we're kind of conditioned to think of that as being the ideal method of doing it. But what we're going to find out over the course of the weeks that we're going to be learning about this is that, like you said, we've been conditioned to think of intervals as high-intensity exercise and we're really not going to be able to get as large of an effect in our body.

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So, really, we're going to have to make do with a little more volume, because if you keep doing the same exercises for a longer amount of time, we're going to have to work even harder. And the way that we know to work harder is the speed. If you have to run with a speed that's faster than that, that speeds up your metabolic rate. So, jumping rope at a faster metabolic rate burns more calories than jumping at a slower metabolic rate.