Split-tracking guide · reviewed July 23, 2026
Track what changes the next decision.
A hybrid-race log does not need dozens of fields. It needs enough detail to show where time went and whether the same pattern repeats under comparable conditions.
Log three time categories first.
Capture running time, work time and transitions separately. This is the minimum structure that makes a total finish time diagnosable. If you only record the total, an improvement or slowdown has no location.
Add the conditions that matter to comparison.
Note the format, approximate work selection, surface or venue changes, and whether the session was a controlled practice or an all-out effort. Do not treat two unlike sessions as a clean before-and-after test.
Write one lesson, not ten.
After the session, choose one observation you can test next time: a transition you rushed, a station that changed your running rhythm, or a pace that was unsustainable. The next plan should respond to that one observation.
Keep the data honest.
Use the same categories even when the result is disappointing. A credible baseline is more valuable than a flattering estimate because it gives your training plan something real to improve.