Power Measurement Data Analysis


	Power Measurement: Select and Quantify

Say a rider did a race and wanted to know:

How many efforts? How intense were they?
How much time in a particular Heart Rate zone?
How much time did the rider spend going fast?
How much time did the rider spend going slow?
What was the longest period when the Heart Rate was above a certain threshold?
How many times was speed above some limit?
How long did the rider pedal at over 120 cadence?

Use this tool to select data from a ride and quantify the answers.

Power Analysis

As an example, a rider did a group ride and made 13 efforts of at least 700 watts lasting from 15 to 100 seconds. The plot below is one of the thirteen plots returned.

Power Analysis

Number of Plots	13	plots
Under Curve for All Plots	222.29	kJ
Plots Cover a Total of	555.66	Seconds

Ave Value 320.3   watts

Max Value 715.0   watts

Min Value 112.0   watts

Start 1086.12   Seconds

Range 104.58   Seconds

Under Curve 33.50   kJ

(A typical plot, one of thirteen, others omitted for brevity.)

Points to note:

The area under the curves is integrated to give, in the case of the power example here, energy in kJ.
Average, maximum, and minimum values are shown.
The starting point for the effort, relative to distance or time from start of ride, is shown.
Range of time for the effort is shown for each plot.
Total number of plots (it's easy to generate more than one wants to see), total area under the curves, and how long in time or distance it took for these efforts.

Heart Rate Analysis

For the Heart Rate analysis, we could ask how many periods there were in a particular range, say 120 bpm to 140 bpm. Since we don't really want the details and since there would be more plots that we want to look at, we accept the summary table. The summary table says there were 60 periods covering 2603 seconds. This is about half of the time on the ride.

Heart Rate Analysis

Number of Plots	60	plots
Under Curve for All Plots	5759.20	Beats
Plots Cover a Total of	2603.16	Seconds