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Joule 2.0 vs. Garmin 500 - Discrepancies in WKO+

Jeff UnruhJeff Unruh
in General Training Discussions

 OK - getting a bit nuts trying to make sense of the data from the two devices.  I suspect the main difference is that the Joule is set to include zero's for power and the Garmin is set to the default "non-zero avg".  During the ride the Garmin was reading an NP a tad higher - 5-6 watts - versus the Joule.  This made sense as the Garmin was not using zeros.  The suprise was the TSS was LOWER on the Garmin despite the higher NP.  Yes - both devices have my FTP in at 228.

What blew my mid was loading up both files in WKO+.

Garmin:

 

Entire workout (163 watts):

Duration:   2:31:01 (2:32:36)

Work:       1473 kJ

TSS:       169 (intensity factor 0.821)

Norm Power: 187

VI:         1.15

Pw:HR:       -9.28%

Pa:HR:       1.79%

Distance:   42.586 mi

Elevation Gain:     1183 ft

Elevation Loss:   1206 ft

Grade:     -0.0 %  (-14 ft)

Min Max Avg

Power:       0 614 163 watts

Heart Rate:   88 161 132 bpm

Cadence:     7 116 84 rpm

Speed:       0 35 17.0 mph

Pace         1:43 0:00 3:32 min/mi

Altitude:     472 730 596 ft

Crank Torque: 0 1799 170 lb-in

Temperature: 57.2 69.8 61.8 Fahrenheit

Joule:

 

Entire workout (180 watts):

Duration:   2:30:18 (2:32:46)

Work:       1494 kJ

TSS:       160.4 (intensity factor 0.848)

Norm Power: 193

VI:         1.08

Pw:HR:       -11.34%

Pa:HR:       2.12%

Distance:   41.84 mi

Elevation Gain:     1030 ft

Elevation Loss:   1037 ft

Grade:     -0.0 %  (-2 ft)

Min Max Avg

Power:       0 615 180 watts

Heart Rate:   88 161 132 bpm

Cadence:     1 118 84 rpm

Speed:       0 34.6 16.7 mph

Pace         1:44 0:00 3:35 min/mi

Hub Torque:   0 410 48 lb-in

Altitude:     342 591 462 ft

Crank Torque: 0 1531 184 lb-in

Temperature: 59 69.8 61.5 Fahrenheit

Sorry for the spacing - can't figure how to remove it...

 

So the Garmin (device - not in WKO+) an avg power of 188 but WKO+ shows 163?  In looking at the WKO power distribution graph it shows almost 14% at 0 power (the joule file, which IS including zeros, shows about 4%).  This must be the cause of the low avg and high VI for the Garmin result.

 

So - any ideas how to fix it?  Should I be running the Garmin with Zero-Avg?  Still not sure how I end up with so much 0 power on the Garmin and not the Joule?!?

 

Debating if it might not be best to stick with the Joule for the race next weekend (have had the Joule for almost 2 years). 

 

 

 

Comments

  • GMAN 19030GMAN 19030

    The zero averaging won't have any effect on the Garmin's NP number.



    Stick with zero averaging (ZAP). Really no need to use non-zero averaging (NZAP) since you have NP.



    Are you sure the Garmin is set to NZAP and the Joule is set to ZAP? The numbers aren't indicative of that. The numbers indicate the opposite.

  • Jeff UnruhJeff Unruh

    Bob,



    Joule - "Power with Zeros = Yes"



    Garmin - "Non-Zero Avg"



    In looking at the raw data option in the WKO graph for each - the Garmin reports a 0 consistently (never a blank) where the Joule has several entries that are blank (no data). This seems to be the main difference...

    EDIT - Found this -- http://www.quarq.com/forum/thread/287/

     

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