Remove Data or Spikes from a FIT File

A faulty heart rate strap or a 2,000 W spike can ruin your averages and training load. Remove a data stream completely, or replace spikes above a level you set.

Remove data

Tick heart rate, power, cadence, GPS, altitude or temperature to remove it from the file. Use it to drop a faulty heart rate trace, or to remove GPS before sharing.

Remove spikes

Set the highest believable heart rate or power. Readings above it are replaced with the reading before, and averages and maximums are recalculated.

Quick answers

Why remove a heart rate trace?
Optical heart rate sometimes locks on to cadence and reads 180 bpm on an easy run. Removing it stops that skewing your training load and recovery advice.


What level should I set for power spikes?
Use a little above your best ever sprint. The tool suggests a starting point from the file.

More free tools for your activity files are on the FIT file tools page.


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Watches and sensors

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  • Apple TV 4K: Zwift on the big screen. I use two.
  • Google Nest Doorbell (wired, 2nd gen): My video doorbell, running in both Google Home and Apple Home. I use it.

Health, recovery and sleep

  • FreeStyle Libre 3 Plus: Shows how my blood sugar responds to diet.
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  • Kineon MOVE+: Red and infrared light for sore knees, Achilles and other joints after hard training. I use it.
  • Oura Ring 5: My partner’s recovery tracker of choice.
  • Eight Sleep: A cooling mattress cover my partner and I use nightly.


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