Motion Analysis: Maximal Aerobic Power Test (MAP) — U23 Cyclocross Racer.

In November 2017, Cody Moore and Neal Henderson from Apex Coaching in Boulder, Colorado used the TYPE-R for motion analysis during Maximum Aerobic Power testing. The test is structured so that the athlete increases watts by 10% of FTP every minute until failure.

Adding TYPE-R motion analysis to this type of test visualizes data that can’t be seen by the naked eye, allowing for a new level of coach to athlete instruction.


In figure 1 below, this rider’s Dead Spot Scores are clustered around 6 o’clock in the pedal stroke, and they occur at power outputs ranging from 220–400+ watts on the left and right side.

This data suggests that the rider is not able to pull the foot through the bottom of the pedal stroke without a significant dead spot.

As we dig deeper into the data, we see that the dead spots all occur at a similar spot in the pedal stroke, and during this test, they occur at cadences greater than 96 rpms.

In figure 2 below, we’ve filtered the PSI Chart to display dead spots at cadences below 66 and above 96 rpms. With this view, we immediately see that the rider recorded minimal dead spots while riding at cadences from 66–95 during this test.

Neal Henderson noted:

“This is the greatest Dead Spot Score that I have seen from any athlete that I’ve worked with. He just performed incredibly well last week (U23 Podium at a UCI C1/C2) and as a racer he is a very able, powerful, skilled athlete, but WOW, there are some very interesting things that we’re going to start to work on. We could not see this in any other way……so core strength and stability is something that we’re going to work on, including sessions on the rollers.”


This athlete completed the majority of this MAP test at higher cadences which led to very high Dead Spot Scores. We clearly see that the athlete has difficulty pulling the foot through the bottom of the pedal stroke at cadences above 95 rpms.

In the future, this athlete may repeat testing to verify the data seen in this MAP test. The rider will want to validate this data by repeating a similar test outdoors. The outdoor test would show differences in pedaling indoors on a trainer and outdoors on the road.

This athlete might also re-test his Maximal Aerobic Power indoors using cadence fixed at a lower range, for example 80–90 rpms. This would isolate motion data at a given cadence, which would allow the rider to address specific issues.

After completing these additional tests, we’ll be closer to a full understanding of where this rider’s pedal stroke has weaknesses. Once we understand these weaknesses in depth, we’ll build training plans that include core strength drills, single-leg intervals, and indoor sessions on the rollers.

Motion Data Summary:

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