What the Execution Score means

The Execution Score (0–100) grades fidelity to the session's objective — the right training stimulus, not raw speed. Training is stimulus + recovery, not racing your workouts, so a "perfect" score isn't about going as fast as possible.

It combines three things:

• Completion — did the prescribed work happen (reps done vs planned).
• Stimulus accuracy — was the work at the intended intensity. If a rep was slower on pace but your heart rate held the effort (a hill, a headwind), that counts as *on-stimulus* — slowing to hold effort on a climb is the correct response, not a miss.
• Discipline — how consistent the reps were and whether the recoveries actually recovered.

What the words mean. Above 90 is *excellent*, then *solid*, *partial*, and *off target*. "Missed" means the session didn't happen — it is about attendance, not quality. If you completed the work, you will never see "missed", however the execution went: a session you turned up for and ran is at worst *off target*, with the reason named.

Uneven pacing costs points, but it can't erase a session. If you completed the reps at the right intensity and simply paced them unevenly, that is a craft fault on top of training that worked — so the pace-spread penalty is capped, and the real spread is still reported so you can see it. Likewise, two moderate shortfalls don't compound into a failure: each shortfall is softened before the pillars combine, so the score reflects a flawed session rather than a failed one. A strong session is unaffected by any of this — 100 still requires there to be nothing measurable left to improve.

It's deterministic and published — no AI guesswork — so the same run always scores the same. When the rules change, stored scores are re-graded under the new ones, so your history never mixes numbers from different rule sets. When there isn't enough data to grade a session honestly (no structured targets, too few intervals), Runsei shows no score rather than a made-up one.