How To Perform A Watt Max Test

by Jesper Bondo Medhus on September 28, 2006


Watt max testing is a fast and accurate way to evaluate your training. I normally recommend serious riders to do a couple of these tests through the season.

Why you should do a watt max test

First of all, it is very motivating to follow progress in performance. When you work hard to achieve a better performance, it is very satisfying to see that you are not vesting your time. Even for small increments, the test is very sensitive.
Secondly, it is possible to use the test results to modify your training program. This could be done either through optimizing your power outputs in the intervals or maybe a test will show that you need a recovery week. The optimal situation is to evaluate the test results with your cycling coach.

Watt max test

1. 15 min warm up
2. 100W workload – increase intensity with 10W every 30sec.
3. Keep cadence at min. 80rpm.
4. Ride until exhaustion
5. Notice the last completed power output. = P
6. Notice seconds spent at exhaustion power output = T

How to calculate the result from a watt max test
Watt max power = P + (T/30x10W)

Example: A rider gets exhausted after 15 seconds at 280W. Thus, his last completed power output is 270W. Calculation of Watt max power = 270W + (15/30 x 10W) = 275W

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{ 3 comments… read them below or add one }

1 Hamish Ferguson December 31, 2006 at 7:40 am

If you have CyclingPeaks you will also be able to see your peak 1min power for the workout. This is your Watt max Power.

2 Jesper Therkildsen June 1, 2007 at 5:30 pm

1min peak power shows your anaerobic performance. The test described above approximates what you can perform at maximum oxygen consumption.

3 john chiasson March 26, 2008 at 5:01 pm

hi, currently im averaging 200 watts per ten mile hill rides on a good gym stationary bike. im 54 and looking foward to the new riding season. im 180 lbs.and new at watt training, what numbers do i need to acheive to get most out of my riding as outlined. i put in a good effort durring the ten mile hill rides and i know its only ten miles but not all rides are hills for that time frame. any help would be great. thanks jack.

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