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3

As Julii alludes to, "zones" are pretty much arbitrary, as you are burning fat as a fuel in all zones, just the percentage to which it contributes to the whole is different for different effort levels. As you get higher in intensity, the more you rely on stored carbohydrates (glucose), and the lower in intensity, the more you rely on fat. They are both still ...


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There is a rule of thumb that anything below 80%HRMax is working within the aerobic zone, whereas above you are heading towards threshold and anaerobic zones (being able to sustain these harder efforts for less and less time). Personally, when training aerobically, I aim for roughly 75% and not higher, even when it comes to hills. There is thought within the ...


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I suppose those are really good questions, because most the formulae just work on rules of thumb & probably we're all too individual for the formulae to work perfectly for everyone reliably. But the question makes me wonder if the whole idea of zones is just a bit hokey, since the transition points are probably not fixed even for individuals; probably ...


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Exercises with kettlebells can be as hard as barbell work, sprinting or high end sport activities if done correctly. 'Kettlecise' sounds like a group class which is typically aimed at anybody. So it might not be suitable for someone already quite fit. Try it out and then increase the weights as necessary. A 8kg kettlebell in a class feels a lot different ...



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