How to track hill repeats properly

Hill repeats are the rare workout where the tracking should be trivial. Same hill, same effort, a handful of reps. And yet most runners finish a hill session with a single blob of a run file: one distance, one average pace, and no honest answer to the only question that matters, which is whether the reps are getting faster.

The problem is not discipline. It is that the tools were built for flat intervals, and hills need a slightly different system. Here is one that works with any watch, or with no watch at all.

Fix the start and the end, permanently

A rep time only means something if it covers the same ground every time. So before you time anything, choose two physical marks: the rock, gate or trail junction where the climb starts, and the post, tree or crest where it ends. Not "roughly the bottom" but a specific object you could point to. Write them down once.

This is the single highest-value step, because it turns your hill into an instrument. From now on, 3:12 on the water tower climb means exactly the same thing in March and in October. Runners who skip this step end up comparing a 610 m rep against a 660 m rep and calling the difference fitness.

Capture the times without wrecking the workout

You have three workable options, in increasing order of comfort:

• The lap button. Press at the bottom mark, press at the top, jog down, repeat. It works, but you are fumbling a button at the start of every hard effort and again while gasping at the top, and one missed press scrambles which lap was a rep and which was a recovery. If you use it, keep a strict rhythm: odd laps up, even laps down.
• A structured workout. Most watches let you predefine "hard, then recovery" blocks. This labels your reps cleanly, but it segments by time or distance, not by your hill, so the rep window rarely lines up with your two marks.
• Time afterwards. Just run the session, then read the rep times off the activity graph at home by finding the climbs in the elevation trace. Zero mid-run fiddling, at the cost of ten minutes of squinting.

None of these is elegant. Pick the one you will actually keep doing, because a mediocre record kept for a season beats a perfect record kept for two weeks.

Record three numbers, ignore the rest

For each session, keep the date and conditions, every rep time, and what the recovery looked like. That is it. A season of hill work fits on one note: the hill's name, then lines like "Apr 14, dry, 3:19 / 3:16 / 3:21 / 3:18, walk-down recovery."

Resist the urge to log pace. On a climb, pace restates the time with extra noise, and it invites comparison with flat running that will only mislead you. If you want to know what a rep is worth in flat terms, run it through a grade-adjusted pace calculator once, appreciate the number, and go back to raw times.

Read the trend like a scientist

Single reps lie. Legs carry fatigue, wind changes, some days the footing is greasy. So judge the session, not the rep: the median rep time of the day is your data point, and the trend across sessions is your answer.

Three useful signals, in order of importance:

• Median rep time across weeks. The headline. Watching 3:15 become 3:08 over six weeks on identical ground is the least ambiguous fitness signal in trail running.
• Spread within a session. Reps at 3:10 / 3:11 / 3:12 / 3:26 say you ran one too many or started too hot. A tightening spread is progress even when the median holds still.
• Same time, easier effort. If 3:12 used to be a gasp and is now merely hard, you improved, whatever the clock says. A note like "felt controlled" next to the times captures this.

And compare like conditions with like. A muddy session belongs next to other muddy sessions; we wrote about measuring progress on repeated routes and why conditions belong on the record.

The bookkeeping should not be your workout

Everything above is fifteen minutes a week of note-keeping, and it is worth it. It is also exactly the kind of bookkeeping software should do. Trailbuddy is being built to recognize the climb you repeated, time every rep between your marks without a lap button, and keep the history per hill, so the trend is simply there when you finish. Until then, two fixed marks and an honest note will carry you a long way.