2478 Garmin Flexible and Interoperable Data Transfer File Text (Unstructured) A file format developed by Garmin, for the storing and sharing of data from sports and health devices. Data is collected during a sporting activity, stored on the Garmin device, and can then be uploaded to the Garmin Connect web service, and other web applications. The format ensures that any .fit compliant device can interpret data from another .fit compliant device. The format allows users to track and compare data about their physical activities over time. 1 Digital Preservation Department / The National Archives 15 Mar 2022 11/2023 (v.115)- Max-offset modified for BOF signature to allow for more exact signature identification. Internally researched. 15 Nov 2023 fmt/1651 PUID fit File extension 1987 Garmin Flexible and Interoperable Data Transfer file BOF Absolute from beginning of file, magic bytes: FIT 1 Absolute from BOF 0 0 {8}2E464954