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Ride data · GarminBy WattsUP · Checked October 13, 2026 · 5 min read

Garmin Smart Recording vs 1-Second Recording: Which Should Cyclists Use?

Short answer: use 1-second recording if you ride with power or heart rate, or use any training app. Smart recording only saves a point when your direction, speed, heart rate or elevation changes, so it can miss surges and leave gaps that change your average power, normalized power and TSS. The main cost of 1-second recording is a bigger file. On an Edge: Menu → Settings → System → Data Recording → Recording Interval → 1 Sec.

What each setting does

  • Smart: in Garmin’s words, it “records key points where you change direction, speed, or heart rate.” On a steady road that can be one point every several seconds or more.
  • 1 Sec (Every Second): “records points every second. It creates a very detailed record of your activity and increases the size of the stored activity file.”

The setting only changes what gets written to the ride file. Your sensors still send data every second, and your head unit’s live screens use it, so the difference shows up afterwards, in Garmin Connect and every app you upload to.

What Smart recording does to your data

  1. Power between points is lost. A 10-second surge that happens between two saved points may not be in the file at all. Normalized power, which weights hard efforts heavily, is the number most affected.
  2. Apps fill the gaps differently. One app may hold each reading until the next, another may give every point equal weight however long its gap. TrainingPeaks, which calculates from every second of data, says gaps can leave its graphs and route maps incomplete and recommends turning Smart recording off.
  3. Averages stop matching. Add the default on many Garmins of leaving zeros (coasting) out of average power, and Garmin Connect, TrainingPeaks and other apps can all show different averages for the same ride.

For a commute or a café ride, none of this matters much. For training with power, where TSS feeds your fitness and fatigue numbers, it does.

How to switch to 1-second recording

  1. Garmin Edge: Menu → Settings → System → Data Recording → Recording Interval → 1 Sec. Menu names vary slightly between models.
  2. Garmin watch: look under Settings → System → Data Recording and choose Every Second.

While you are in Data Recording, note the Power Averaging setting too. It controls whether zeros from coasting count in your average power, which is the other common reason averages differ between apps.

What about rides you already recorded?

The missing points are gone, but you can still get sensible numbers. The WattsUP FIT File Viewer weights each recorded point by the time until the next one, so a reading that stood for 15 seconds counts for 15 seconds, and stops with no distance covered are left out. Averages, normalized power and TSS then land much closer to what you actually rode. Want to know how to get the file in the first place? See how to open a FIT file without Garmin Connect.

Frequently asked questions

Should I use Smart recording or 1-second recording on my Garmin?+

If you ride with a power meter or heart-rate strap, or upload rides to a training app such as TrainingPeaks, Intervals.icu or WattsUP, use 1-second recording. Smart recording is fine for casual rides where you only care about distance, time and the map, and it saves some memory.

Does Smart recording affect power data?+

Yes. Smart recording only stores a point when the device detects a change in direction, speed, heart rate or elevation, so power between points is not saved. Apps that calculate normalized power and TSS from the recorded points can then show different numbers from your head unit, and short surges can be missed.

Does 1-second recording use more battery?+

It uses more memory, and TrainAsONE notes it can use more battery too. The files stay small, typically a few hundred kilobytes per hour of riding. If you ride close to your device’s battery limit, check its battery estimate after switching.

Why is my average power different in Garmin Connect and other apps?+

Two common reasons. Smart recording leaves gaps that apps fill in different ways, and most Garmin devices leave zeros (time spent coasting) out of average power by default, while TrainingPeaks and others keep them. Switching to 1-second recording removes the first difference.

Can I fix a ride I already recorded with Smart recording?+

You can’t recover points that were never saved. What you can do is use software that weights each point by the time until the next one. The WattsUP FIT File Viewer does this, so a sparse point counts for its whole gap and averages stay closer to what you rode.

Sources

WattsUP is not affiliated with Garmin.