Trimming an activity (cut warm-up / cool-down)

When to trim

Trim when the file includes time that isn't the effort: a long stationary wait at the start, the watch left running past the finish, or warm-up / cool-down you don't want polluting the stats. Trimming recomputes the session's effective duration, distance, pace, HR, power, NP and the recap analysis.

The visual tool

On the activity's Trim & Adjust panel:

• ✨ Suggest trim: auto-detects the first and last sustained movement from the speed trace and proposes the cut. Best starting point.
• Drag the red boundary lines on the chart to set the cut by eye.
• Zoom: Start / End / Full: zoom into the first or last minutes for a precise edge.
• A live "Keeps H:MM:SS · X.XX km" readout updates as you adjust, so if you over-cut, you see the distance drop before you save.

Don't over-trim

Cutting real riding/running makes the session look shorter and faster than it was, and skews pace, power and gradient analysis. The live distance readout is your guard, if it drops below the real session distance, you've cut too much. Trimming stationary time (speed ≈ 0) is safe: it removes time without removing distance.

Where to go next

• What you see in a workout
• Power & data quality