How to Put Your Power (Watts) on Your Cycling Videos

On a climb video, speed lies. 14 km/h looks like nothing — until the overlay says 380 watts. Power is the number that shows how hard the effort actually was, and it's the one cyclists most want on screen. It's also the one that most often goes missing between your bike computer and your video.

This guide covers where power data lives, how not to lose it, and how to get it on your footage in sync.

First: you need a power meter

Power on screen has to come from somewhere real. That means a power meter — pedals, crank, spider or hub — or a smart trainer indoors, recorded by your bike computer or watch.

If you ride without one, Strava may show an estimated power figure on your activity. That number is calculated after the fact from speed, gradient and weight, and it isn't included in Strava's exports. No overlay tool can show it, because it was never in your data.

Where your power data lives

Your bike computer (Garmin, Wahoo, Hammerhead) records power in its original file, usually a FIT file. From there, it travels to Garmin Connect, Strava or wherever you sync. What matters is that it survives each hop:

• Strava, connected directly — overlay tools that sign in with Strava read your activity's data streams, which include power from a power meter. Nothing to export.
• Strava, exported — Export GPX from the activity on the Strava website includes power measured by a power meter (not estimated power). Export Original gives you the file your device uploaded, usually FIT, with everything in it.
• Garmin Connect / Wahoo — export the original FIT, or a GPX.

The catch: in a GPX file, power isn't a standard field. It's stored in an "extension" inside each point, and not every overlay tool reads it. If your power gauge comes up empty, try the FIT file, or a tool that reads power from GPX extensions.

Syncing power to the footage

Power changes fast — a sprint goes from 200 to 900 watts in two seconds. A small misalignment between video and data is much more visible with power than with speed: the number jumps before you stand on the pedals, or after. Line up the sync carefully on a moment you can see clearly (setting off, a sprint, cresting a climb) and check it on a second moment before you export. Here's the step-by-step for syncing GPS data to video.

What a power overlay should look like

• Power big, everything else small. If the clip is about effort, power is the headline. Speed and heart rate support it.
• Use a smoothed value. Raw second-by-second power flickers so much it's unreadable. A 3-second average is what most cyclists recognise from their head unit.
• Add the gradient on climbs. 350 W at 10% tells the story; 350 W alone doesn't.
• Leave room on vertical. On a 9:16 clip, keep the gauges away from the edges, where Instagram and TikTok put their buttons and captions.

Tools that show power

• Stamptivity — free, in the browser: upload a FIT or GPX file and your footage, add a power gauge, export without watermark in 16:9 or 9:16.
• Telemetry Overlay — $199 one-time, desktop (Windows/Mac/Linux), reads FIT and GPX and has cycling presets with power gauges. Most control, most setup.
• Insta360 Stats Dashboard — free with an Insta360 camera, and accepts Strava data.
• SportsSync — what we build. Connect Strava and your power comes with the activity; or upload a GPX and SportsSync reads power from its extensions. Pick a moment and get a short of up to 30 seconds (10 on the free plan) with power, speed, heart rate, cadence and gradient synced to your footage, in vertical or three other formats, from your phone — and publish it to Instagram from the app (needs an Instagram professional account). Free: 3 activities with 3 clips each, kept for 30 days; Pro is €9/month or €89/year.

If your clips are heading to Instagram or TikTok, also read what breaks with vertical overlays — missing power data is one of the problems covered there.