Beoflow

Field test

Turn a hard effort from a recorded session into an updated threshold and training zones.

Analysis · Updated 16 October 2026

For
Athletes and coaches
On
Web

Before you start

  • Field tests run on the web. Use a completed session with power, heart rate or (for running) pace.
  • To update your zones, the effort must be a Time Trial or Steady State of at least 4 minutes.
  • Coaches can run a field test on an athlete’s session while viewing that athlete.

Run a field test

  1. Open the session and choose Field Test Mode from its menu.
  2. Pick a test type: Time Trial, Sprint Test, Steady State or Tag Effort.
  3. Choose By Time or By Distance, then select the part of the session to test.
  4. Read your results: time, distance, average and maximum power, heart rate and speed.
  5. Compare the effort with similar ones under Your history.

Update your training zones

  1. In the zone impact card for Power, Heart Rate or Pace, select Calculate Training Zones.
  2. Check the new threshold and zones. You can edit the threshold and select Recalculate zones (for heart rate, Recalculate from threshold or Recalculate from max).
  3. Under Save, choose what to write: Threshold, Zones and, for heart rate, Max HR. Max HR is switched on for you only when this effort beat your stored maximum.
  4. Select Update Training Zones, then Confirm in “Update training zones?”.

Your new values replace your global threshold and zones, the ones every sport uses unless you have turned on per-sport zones. They are saved as manually set, so automatic detection won’t overwrite them.

Tag a best effort

Select Tag as PB / Max Effort, then Save. Tagged efforts of 5 minutes or longer also help Beoflow estimate your threshold.

What you’ll see

  • Pace is offered for running only. Cycling uses power and speed.
  • Short efforts are scaled to estimate your threshold. From 60 minutes for power and pace, and from 20 minutes for heart rate, your average is used as it is.
  • If your threshold is set by hand, the card says so, and calculating offers to replace it.

Troubleshooting

  • “This effort is too short to estimate updated zones from”: select at least 4:00 of steady effort.
  • No zone update offered: choose Time Trial or Steady State. Sprint tests and tagged efforts don’t update zones.
  • “Could not update zones. Please check the values and try again.”: check the edited values and try again.
  • Paddlers: a paddling test updates your global power threshold, not your paddling Critical Power. Set paddling CP on the Paddling tab of Training Zones.

Privacy

A field test reads the heart rate, power, pace and speed from the session you open. The results and your zones are visible to you and to a coach you share your data with, who can also update your zones.

  • Training zones
  • Performance curve and best efforts

Still not sure? Ask the team and a person will answer.

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