### Mean-Max Explanation

Posted:

**Fri Feb 05, 2010 8:59 pm****Mean-Max Explanation:**

The mean max chart is defined as this: The maximum average power/HR/cadence (Y-axis) that you could hold for a period of time (X-axis). This is from 1 peak instance in the activity, sort of like max HR: you may have hit your max HR only 1 time; likewise you may have only held this power/HR/cadence 1 time.

See the example chart below:

This is often looked at for power analysis... the maximum amount of time that you can sustain X watts. Here you can find your '5 second power', or '20 minute power', etc. Sometimes people call this CP5s or CP20min for '5 second Critical Power' etc. Power analysis was the driving force behind this chart.

In the above example, you'll see 700 watts was held for about 10 seconds, and 300 watts was held for about 400 seconds (or 6-7 minutes). You'll notice that the X-axis is logarithmic... the first tic mark is 0:10, leading to 20, 30, 40sec. etc. The the next major tic is 1:40 or 100 seconds, leading to 200, 300, 400 seconds. The next tick leads to multiples of 1000, etc.

I'm unsure as to the importance of HR with respect to this chart, applying HR to this chart is a little new to me, but essentially it's the same concept: Maximum amount of time that you could sustain X average HR.

Cadence may really irrelevant here, but I included it because someone might like it if they're trying to do high-cadence intervals on a trainer or something (and it was really easy to include.)

Sorry the display is slow at the moment, there are lots of calculations that go into this, and I plan to look at what I can do to speed it up; so in the meantime bear with me.