The single most common half marathon experience is feeling wonderful for six miles and then progressively worse for seven, which is not a fitness problem — it is a pacing decision made in the first ten minutes. Here is why people go out too fast, how to pace it properly, and how to execute on the day.

Why People Go Out Too Fast

Everything conspires at the start: the the-you-are-fresh-and-it-feels-easy (the early miles feeling deceptively comfortable from the first-guide logic — the feels-easy-early), the the-adrenaline-masks-the-effort (the race-day adrenaline hiding the true intensity from the race-week logic — the adrenaline-masks), the the-everyone-around-you-is-going-fast (the crowd pulling you along at their pace from the first-guide logic — the crowd-pulls-you), the the-the-taper-makes-you-feel-superb (the tapered legs feeling better than they have in weeks from the race-week logic — the taper-feels-superb), the the-you-bank-time-you-cannot-keep (the the idea of banking time being a reliable trap from the first-guide logic — the banking-time-fails), and the reframe (the second-half collapse as a first-ten-minutes decision — fresh legs, adrenaline, a crowd and a taper all conspiring to make too fast feel exactly right).

How to Pace It

Executing the plan: the the-know-your-realistic-target-pace (the setting a target from actual training data from the training-plan logic — the realistic-target), the the-start-slower-than-target (the deliberately starting slower than goal pace from the first-guide logic — the start-slower), the the-the-first-two-miles-are-controlled (the treating the opening as deliberate restraint from the first-guide logic — the controlled-opening), the the-settle-into-pace-by-mile-three (the reaching goal pace only once settled from the first-guide logic — the settle-by-three), the the-even-or-negative-splits (the running the second half at or faster than the first from the first-guide logic — the even-or-negative), the the-let-people-pass-you-early (the accepting being passed in the first miles from the first-guide logic — the let-them-pass), the the-use-effort-not-just-the-watch (the pacing on effort as well as pace from the training-plan logic — the effort-and-watch), and the the-account-for-hills-and-wind (the adjusting expectations for terrain and conditions from the training-plan logic — the adjust-for-conditions).

The Race-Execution Notes

On the day: the the-practise-race-pace-in-training (the rehearsing goal pace in training runs from the training-plan logic — the practise-race-pace), the the-fuel-to-the-plan (the following your tested fuelling plan from the fueling logic — the fuel-to-plan), the the-do-not-chase-a-fading-group (the not following a group that is slowing or surging from the first-guide logic — the do-not-chase), the the-the-middle-miles-are-where-it-is-won (the miles six to ten deciding the race from the first-guide logic — the middle-miles-decide), the the-expect-it-to-get-hard (the accepting the last few miles being hard regardless from the first-guide logic — the expect-it-hard), the the-break-the-last-miles-into-pieces (the mentally segmenting the closing miles from the first-guide logic — the segment-the-end), the the-recovery-starts-at-the-finish (the recovery beginning immediately after from the post-race-recovery logic — the recover-after), and the frame (the half marathon as decided in the first ten minutes — started slower than target, settled by mile three, run to even or negative splits, with the middle miles doing the real work. Start slower than target pace, settle by mile three, let people pass you early, and aim for even or negative splits).

The single most common half marathon experience is feeling wonderful for six miles and then progressively worse for seven, which is a pacing decision made in the first ten minutes rather than a fitness problem. People go out too fast because they are fresh and it feels easy, adrenaline masks the effort, everyone around them is going fast, the taper makes them feel superb, and banking time does not work. Pace it by knowing your realistic target, starting slower than target, controlling the first two miles, settling by mile three, aiming for even or negative splits, letting people pass early, using effort as well as the watch, and accounting for hills and wind. Execute by practising race pace in training, fuelling to plan, not chasing a fading group, respecting the middle miles, expecting it to get hard, and segmenting the last miles.