PowerTap Joule GPS User Guide - Manual (Page 58)

Appendix A: HISTORY REPORTS
Climbing and Surges Report
M/FT GAIN
The total vertical distance in feet or meters traveled or climbed over a given distance ridden.
AV% GRADE
The rise or vertical increase in elevation divided by the run or horizontal distance traveled multiplied by 100 (rise ÷ run x 100).
M/FT LOST
The total vertical distance in feet or meters descended over a given distance ridden.
VAM
1. The rate of vertical ascent in meters per hour. Note: At an 8% grade, a rate of ascent of 1800 meters per hour requires a power
output of 6.3 watts per kg and is considered the upper limit for climbing speed in professional cyclists. To compare that with age
group racers and recreational riders, their VAM on the same grade would be around 1064 and 560 m/hr, respectively.
Surges
A surge is a sudden, short acceleration lasting a minimum of 3 seconds within a particular “power to weight” or w/kg zone. The value
displayed is the number of surges occuring within a w/kg zone. Once a surge is recorded in a w/kg zone, the rider’s current w/kg
power value must drop at least 0.1 w/kg below the minimum of the zone before a new surge can be considered. For this metric to be
calculated correctly, the rider’s weight must be accurate, as listed in the User section of the Main Menu on the Joule GPS.
Joule GPS User Guide page 58