You’ve just finsihed that hard training session and the .fit file looks wrong when you get back home. Do you re-run the session or try to edit the file?! But how can you modify it?
Try this useful website by the lovely people at .FIT File Tools
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Last Updated on 12 January 2026 by the5krunner
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tfk is the founder and author of the5krunner, an independent endurance sports technology publication. With 20 years of hands-on testing of GPS watches and wearables, and competing in triathlons at an international age-group level, tfk provides in-depth expert analysis of fitness technology for serious athletes and endurance sport competitors.
