Power phase provides a valuable description of how you’re currently producing power in a pedal stroke. Garmin power meters detect where the leg is generating positive torque in a pedal stroke and where the greatest concentration of positive torque occurs. It also senses the angle at which these forces begin and end and where your concentration of power is produced. If you’re using a dual-sensing power meter, you get to take your analysis one step further and see if there are differences between the left and right leg.
Power phase is measured as a combination of degrees and arc length, with 0 degrees representing the 12 o’clock position and 180 degrees representing the 6 o’clock position. The length of the power phase is measured by the difference between the starting and end angles. For example, a power phase starting angle of 5 degrees and a power phase end angle of 220 degrees would represent a power phase arc length of 215 degrees. With dual-sensing pedals, this information is provided for your left and right legs. Then you can view where the majority of power is produced using the peak power phase metric (PPP). The default setting is for PPP to represent 50% of the power output, but this can be adjusted up or down depending on your preference.
You can view power phase metrics displayed graphically on Edge devices and on Garmin Connect. This makes it easier for you to visualize your pedal stroke.
