Hlaupisub-50 10K

Sub-50 10K · 16 weeks from 2026-08-10 · week 9

The plan

One workout per slot per week, one hard session at most — and from week 4 that session is Sunday's football. Base → threshold → 10K-specific → peak → goal window, with down weeks at 4, 8 and 12.

Week 9 · 10K-specific · target 22 km

Benchmarks

Riegel from your 5K best effort (23:55 on 08-27, measured by Strava): 49:52 for 10K today, against 49:59.

Your paces

from 5K best effort (23:55 on 08-27, measured by Strava)
EasyLongSteadyThreshold1K reps400s
6:12–6:526:02–6:375:32–6:025:03–5:154:40–4:504:22–4:35

These override the printed bands in the workouts. Easy means easy: the top of the easy band is a ceiling, not a target.

Lunch runs

Wednesday

Everything currently out of reach — a half marathon, a 21:xx 5K, sub-47 for the 10K — is the same problem: weekly volume. These runs are the cheapest way to build it, because they land in a lunch break that competes with nothing, in the only daylight an Icelandic winter offers, on a flat route. They are also the runs most likely to survive November: every previous block ended in autumn, and none was built on a habit that fits inside a workday.

Pure easy — the default, and the one to pick when in doubt35m · 5.3 km

Easy + strides — keeps the legs quick without costing anything aerobically36m · 5.6 km

Short shuffle · 30 min — the version that still counts on a bad day30m · 4.4 km

Walk / run · 35 min — for the day after football, or the day something is grumbling28m · 4.1 km

The rules
  1. Easy means easy: 6:20-6:50/km, conversational, HR under 150, every single time. These runs exist to add aerobic time — the moment they turn into moderate running they start eating Thursday's session instead of feeding it.
  2. Time, not distance. Thirty minutes is thirty minutes whether it is 4.4 km or 5.0. Run the route out-and-back and turn at half time; chasing a distance at lunch is how an easy run becomes a tempo.
  3. Never the day before the long run, and never the day after football. Wednesday is the day; Tuesday's easy slot is the other lunchtime run, and Friday is not a lunch-run day in this block.
  4. One a week, and never more in this block. Weekly volume is capped at roughly 1.3× the biggest week on record (25.6 km); the half-marathon build in the new year is where more belongs.
  5. They are the first thing to drop when tired, sore, or with a niggle open — but they are not optional in the sense the evening recovery jog is. From November they are the week's daylight running.
  6. Flat and familiar. Lunchtime is not the moment to explore, and descents are what the knee objects to.
Week by week
WeekRunsEach≈ km
W4130 min5
W5130 min5
W6135 min5
W7135 min5
W9135 min5
W10130 min5
W11135 min5
W12130 min5
W13135 min5
W14135 min5
W15130 min5
W16130 min5

Sunday

football, evening · from week 4

1 hour, Sunday evening — treat it as that week's quality session and drop Thursday's intervals. The only full match on record ran 90 minutes at HR 129 with 22 minutes in cardio/peak, so a scheduled weekly hour is real load, not a kickabout. Reinstate Thursday only when Sunday genuinely was light. Saturday's long run is ~30 hours before kick-off, so a heavy long-run week is a week to play easy — and Saturday morning rather than evening buys six more hours. Nothing runs on Sunday itself: the day is the game.

Terrain, per session

Easy. Terrain doesn't matter, effort does. On a hilly route your raw pace will look slow — that is correct, not a bad day.

Quality. Run quality sessions on the FLATTEST route you have. Your routes now average ~14 m of climb per km — nearly three times your historical average — and goal pace on that terrain is a different, much harder session than the one written.

Long. Hills are welcome here, but CHECK THE DESCENT PROFILE before setting off, not just distance and pace. The week-2 long run carried 21.6 m/km — double what was prescribed — and put its steepest descent (~11%) at 8.9 km, which is where the lateral knee pain started. Steep downhill at the end of a long run is the single worst placement for it. Otherwise judge effort by grade-adjusted pace, not raw pace: on your usual terrain that is 10-15 s/km.

Recovery. Flat and short. Nothing to prove here.

The rules of the block
  1. Choose exactly one workout from each required slot per week.
  2. Choose at most one quality workout per week.
  3. Optional recovery run is only added when recovering well.
  4. Keep at least one easy or rest day between quality and long sessions when possible.
  5. If unusually fatigued or sore, choose the easiest option or rest.
  6. Sunday football IS that week's quality session: 60 minutes on a quarter pitch as a winger, 20-30 near-length efforts — that is a repeated-sprint workout by any other name. Never run 400s, strides or a time trial in the same week; if you want a second quality run, make it the tempo or threshold option, which is the one thing football does not train.
  7. Swimming counts as the optional recovery session: easy, unmeasured, no impact. It never replaces a required running slot — aerobic fitness in the water does not transfer to running legs.
  8. Every week is Tue easy (at lunch on the flat route when the day allows) · Wed lunch run, plus an optional evening swim · Thu quality · Sat long in the morning · Sun evening football. Monday and Friday are off. Nothing runs on Sunday: the day is the game.
  9. Run Saturday's long run in the MORNING. Football is Sunday evening, so an early Saturday leaves ~36 hours before 20-30 near-max efforts instead of ~30 — sprinting is where hamstrings go, and the recovery window is the cheapest protection available.
  10. Lunch run (Wednesday) is volume, not a session: 30-35 minutes at 6:20-6:50, HR under 150, always easy, one a week, never the day before the long run. Tuesday's easy slot is best run at lunch too — the same flat route, the same cap. From November these two are the only daylight running in the week.

All 16 weeks

W1Base · 08-10 · 18 km
W2Base · 08-17 · 20 km
W3Base · 08-24 · 10 km

INJURY WEEK. Lateral right knee pain on descent (plus right hip and groin) stopped the week-2 long run at 8.9 km. No running before Wednesday at the earliest, and the first run back is a gate, not a session: 4 km flat, and any return of the same outer-knee sensation ends it on the spot. No descents at all this week — downhill is what provoked it, and flat running is usually tolerable long before hills are. Week 2 still banked 26.4 km, the biggest week on record, so there is nothing to make up.

W4Base · 08-31 · 18 km
W5Threshold · 09-07 · 20 km
W6Threshold · 09-14 · 22 km
W7Threshold · 09-21 · 22 km
W8Threshold · 09-28 · 26 km
W1010K-specific · 10-12 · 26 km
W1110K-specific · 10-19 · 24 km
W1210K-specific · 10-26 · 20 km
W13Peak · 11-02 · 24 km
W14Peak · 11-09 · 28 km
W15Peak · 11-16 · 22 km
W16Taper · goal window · 11-23 · 20 km