Lap Delta for Garmin devices

Training
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Hi everyone,

I had the idea of a new data field for Garmin devices that would show the time delta between the current lap and a previous lap. This is similar to the delta time used in motorsports for comparing laps, for example during F1 or Indy qualifying. Instead of waiting for the end of the lap to see your lap time, you can see the time difference update second-by-second through the lap. It’s a bit like the live segments feature but it works for any course/any lap with no setup.

I had this idea a long time ago … while doing multi-lap XC and gravel races actually, and just got around to implementing it. I’ve found some pretty neat features to add to the basic concept and have a few more ideas coming. I’ve been using it for short laps, long laps, climbs and a little bit for comparing aero effects. It should work pretty well for descents too - for example, shaving tenths of a second through line choices and carrying speed through corners and over bumps,

Check it out here - https://apps.garmin.com/apps/39fb3c6e-b82d-4391-b9ab-452885788909?tid=3

If interested, please give it a try and let me know what you think. Thanks!

Mark.

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Is it based on a comparison of GPS position or based on distance traveled? I assume the latter, neat concept, will definitely look top give it a try.

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That’s a very insightful question. :slight_smile:

I realized that distance-based is good enough, easier to compute and less error prone. In fact, I’d say that distance-based is preferable because it opens up more use cases. For example, in a marathon you could break up the activity into 26 x 1 mile “laps”, or a century ride could be treated as 10 x 10 mile laps. It is still meaningful to have a pacing delta even if the terrain or conditions are varying.

I also support time-based and energy-based (where energy is the accummulation of power) which opens up new use cases.

You can find more details at Lap Delta Pro if you are interested. Thanks!

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Totally gonna give this a try

Joe

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