While there are a number of ways that you can have training data sync'ed to your Sixcycle calendar automatically (see below), sometimes you need to upload FIT or TCX files manually. Here's how:
1. Navigate to your calendar.
2. Click the upload button on the top right of the Timeline.
3. Either click in the popup window to navigate to your files, or drag-and-drop them onto the popup window.
4. Wait for your files to upload, and when complete click anywhere outside of the uploader popup to close it.