70.3 · Full distance · Marathon

Know what to fix before your next race.

Upload the FIT file from your race. In minutes you get an execution score out of 100 and five findings: how you paced the bike, how the run held up, what you got right, and the one thing to change next time. Anchored to your numbers, and willing to contradict your memory.

Free · No account needed · Takes about a minute

thedebrief.cc/report/…
thedebrief
IRONMAN Copenhagen
IRONMAN Copenhagen2023-08-19● Worlds qualifier
140.6
IRONMAN Copenhagen
9:12:22
255W
NP first half
213W
NP second half
0.725
Intensity factor
4:44/km
Avg run pace
1 / 7 · swipe to move
The numbers behind it

Scored, and read against
the day you got.

Sample race · Full Distance · 9:12:22

Every report opens with arithmetic you can check. The score breaks into the components it was built from, and the day you raced in is read off your own GPS trace, hour by hour. The findings that follow are written against both. This is the real report, on a sample race.

Execution score
73StrongHow well you raced it, not how fast. Out of 100.
Run durability81
+8.2% split · +5.1% decoupling.
Bike intensity100
IF 0.725 (target 0.68–0.74).
Bike evenness100
VI 1.01.
Bike durability58
−14.1% power · 12.7% decoupling. Whether the bike held together: power fade, and heart rate drifting off it.
Run consistency23
1 of 4 blocks even. How level the run was, block to block.
Run opener36
opener -11.3% vs rest. The first part of the run against the rest of it.

Scored against the targets for this distance, so it can be compared with your other races whatever you raced. Anything your file did not carry is left out rather than counted against you.

One number you can hold against your other races, which a finishing time cannot do: that moves with fitness, course and conditions. Anything your file did not carry is left out rather than counted against you.

Race-day conditions

The day warmed steadily under you, from 20.2C at the start to 27.1C at its warmest during the bike, a 6.9C climb across the race. The wind held steady at about 21 km/h (moderate) from start to finish and stayed out of the WSW. The day asked most of you through the wind: 60 of the 180 km you covered were spent pointing into a moderate wind, while the heat load stayed at warm. The hardest stretch anywhere in the race was 75 to 90 km on the bike, at 6.1 m/s on the nose. Where that actually landed is on the leg page.

Air temperature · by time into the race
20–27°
Range over the race
6.9°C swing
27°
Warmest point
4h50 in, during the bike
45–57%
Humidity
18–23km/h
Wind speed
direction and exposure are per leg
Heat loadBike warm

Warm enough to cost a few beats per minute of heart-rate drift at the same effort, though not on its own enough to account for a large fade.

Heat, humidity and wind across the hours you were actually out there, plus, on each leg, how many kilometres you spent pointing into it. Illustrative conditions on a sample course: your report reads the real hours for your race.

Sample finding · Warsaw 70.3 · Run analysis
“The run broke at km 5, not km 15. Out of T2 at 3:47/km, you settled to 4:08/km by km 5. Most athletes remember the second half as the collapse. Your file shows the pace ceiling was set at km 5.”
Actual report output, generated from an athlete FIT file
Read my race →Free · No account needed
How it works

One file. Three steps.

1
Upload your FIT file
Garmin, Wahoo and Polar. Multisport files are split into bike and run automatically.
2
We read the whole race
Every second of power, heart rate and pace, plus the weather at the course on the day.
3
A score and five findings
How the race went, the bike, the run, what you got right, and the one thing to change. On a page you can send to your coach.
Guides

Questions your race
file answers.

The reads people come looking for after a race, for both distances. Each one walks through what the data shows, then reads yours when you upload.

Get started

Get your debrief.

Garmin, Wahoo and Polar FIT files, for a 70.3, a full distance, or a standalone half marathon or marathon. Multisport files work as they are, bike and run extracted automatically.

Free, always. No subscription, no credit card, no account.
About a minute. Nothing to install. We read the file and fill in what we can.
Honest findings. Anchored to your data. Willing to contradict your memory.
Yours to share. A private link you can send straight to your coach.

Analyze your race

Most of this is read straight from your file. Five findings back in minutes. See a real report first →

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