For Everyone Training & analysis

Activity notes: the file note vs the comment thread

Two distinct note surfaces on an activity, and what each is for.

Two places notes live on an activity

An activity has two separate note surfaces. They are not duplicates: they store different things.

1. Activity.notes (the file note)

A single text field on the Activity record. It holds the workout description from the source FIT file (when the file carries one, like a Garmin workout description) or a short coach annotation if you typed one in.

Use for: the original workout intent, a one-line summary, or a short coach-side annotation that does not warrant a thread.

2. ActivityNote (the comment thread)

A chronological multi-message thread between the athlete and the coach about this specific workout. Stored as ActivityNote rows on activity.comment_thread.

Each ActivityNote has:

Ordered oldest-first so the conversation reads top to bottom.

When to use which

Situation Surface
FIT file workout description from a planned session notes
One-line coach summary on a recent activity notes
Athlete saying "felt great, breathing easy" ActivityNote (athlete)
Coach replying "power looked clean, push pace on next one" ActivityNote (coach)
Long debrief after a key workout ActivityNote (coach)
Concerning observation that should appear elsewhere CoachNote (see below)

Difference from a CoachNote

A CoachNote (see Writing coach notes) is a structured coach record attached to an athlete, optionally linked to an activity or race, with privacy gating, concerning flags, and templates. CoachNotes are for structured observations and prescriptions.

ActivityNote is for conversational back-and-forth about one specific workout. Lower stakes, no privacy gating beyond who can see the activity itself.

The two coexist: a workout can have a coach's structured note (in CoachNote) plus the athlete's "this felt rough" entry (in ActivityNote).

Where the thread shows up

The comment thread is visible on the activity detail page (/athlete/<public_id>/activity/<activity_id>/). New replies sort to the bottom of the thread.

See also: Writing coach notes, Activity detail page.

Last updated May 12, 2026

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