Criterium Power Analysis

[sogood]

HR is an indirect measure of work load. Power is power, is what your leg muscles are putting out. So the question is, are you training your heart or your muscle primarily? If it's leg muscles, then use power and let the heart-lung follow.

[Alex Simmons/RST]

Are your watts displayed live while you cycle? Or is the data mainly used for post workout analysis?

Both

For instance would you train within a watt zone, like HR Zone training?

Well, you do use a power meter to help guide the overall intensity of a training session, in a similar way to how one might use a HRM, but that's about where the similarity ends.

So, for example, if you mean use the meter to help guide specific efforts, such as doing threshold intervals and so on, then yes the power meter is excellent for that.

Power is simply the most direct and best measure of intensity.
After that comes perceived exertion.
HR is down the list in my experience.
Speed doesn't rate at all.
and don't mention cadence

[sogood]

...and don't mention cadence

You rang?

You better stop those trackies doing their leg spinning exercises on rollers. They are mad on their cadence!