Reading a run

Every run you have done, one tap away.

• Filter by type; sort by load, pace, Heart-rate drift or distance.
• Fastest distances: your best 1 km, 5 km, 10 km… found inside any run, not only races.
• Each row: workout type as a colour, any record medal, load, pace, heart rate, how well it held, time in zones.
• Compare types sets your four workout types side by side.

Did you run the session you were given, and was it a good one?

• Against the plan: every rep against the plan's target band, faster to the right.
• The coach's read: the session in one line, such as 3 × (1.2 km, 2:00 rest, 400 m, 60 s rest), then speed, pacing, intensity, recovery between reps and how you came in, each against your usual for that kind of session.
• Below: summary, route, streams, zones, durability by quarter, elevation, running mechanics, conditions and splits.
• The type at the top: every run gets one, and when Cursans is not sure it asks you once in Today's One question card. Tap it to change the type; your choice always wins.

Like against like: your 400 m reps against your 400 m reps, never against a tempo run.

• Heart-rate drift: how much less speed each heartbeat bought in the second half than in the first. Up to 5% is steady (Friel 2009).
• Where drift starts, on long runs and races of an hour or more: the point after which heart rate climbs for good. Later and smaller is better (Smyth et al. 2022). A single run is described, never coloured.
• How you came in: that day's check-in, and how hard the run felt if you said so.
• Fuel, on long runs, races and runs of an hour or more: an estimate of the carbohydrate and fat the run used, as a likely range, never a verdict. Add what you took in the run (gels, sports drink and others) if you like.
• A step up in distance: a run more than 10% longer than your longest of the 30 days before gets a note with its size (Frandsen et al. 2025). It describes the step; it is not a diagnosis.
• A year apart, on training runs: the same kind of run, about as long, a year earlier, as speed per heartbeat, with the weather's part stated.
• Patchy heart rate? When the watch recorded only part of the run, Coach's read says so first, and the run is not judged on heart rate.

Got the session from a coach in a message or a spreadsheet? On the run's page tap Add the session as written and paste it, for example 2 km WU, 6 × 800 m @ 3:40/km w/ 90 s jog, 1 km CD. Cursans shows how it read it (Read as) before you save, then lays it over the recording and reads the reps and recoveries from it. It wins over a plan app's text and stays on your phone.

Your race, explained on one screen.

• The finish time, one badge (a best or a first) and one sentence on how it went.
• How the race went: your pace km by km inside a ±5 s band around race pace, heart rate underneath. Tap any km.
• Your marathons (or halves, 10Ks…): every race of the distance. A hollow dot was run at an easy heart rate, not raced.
• What the race says: keep, adjust and check, each with its evidence.

Faster at the same heart rate is fitness, not a braver day. The race page shows which one it was.