Base → 5k PB → Bath Half PB

33M, 5'7", 55kg  |  Anchor race: Bath Half Marathon, Sun 14 Mar 2027  |  30-week runway from Mon 17 Aug 2026  |  Fixed days: Tue (easy with Jen before work, from wk7; buggy before that), Fri (buggy, FitFam long run club), Sun (buggy, Bath Fit Fam family run)

Recent updates & notes
Paces:
Week 117–23 Aug 2026
Base
FIXEDfixed   QUALITYkey session   LONG RUNweek's long effort   RACErace day

Distances below are typical - real weeks vary. Since the Bath move, Friday FitFam has run 18–20km (not the 15km originally assumed) and Sunday Bath Fit Fam 12–19km (not 10km) - both corrected here. The Overview tab’s volume table shows a realistic low–high range per week, not just this single typical number.

DaySessionDistancePaceTimeIntensity

Training paces

Updated 2 Sep 2026: rebuilt around a 16:00 5k goal, not current PBs (see Recent updates above). Originally from actual race times - 10k PB 35:01 (5:38/mile · 3:30/km), Half PB 1:18:39 (6:00/mile · 3:44/km) - more reliable than unverified watch HR zones - now shifted faster by the same method to target a 16:00 5k. Buggy days show two numbers: the underlying easy pace, and (in bold) the pace you'll actually run pushing the buggy. Sessions with a harder component (fartlek, hills, strides, tempo, threshold, HM-pace) now show two numbers the same way: the easy pace for the warm-up/cool-down/recovery portion, and (in bold) the actual target pace for the hard part.

Zonemin/kmmin/mileUsed for
Easy / recovery4:02–4:266:30–7:08Tue (with Jen), Wed/Sat easy runs from wk7; default easy running
Family easy (Sun)4:07–4:356:37–7:23Underlying zone for the Sunday family run
Buggy-adjusted family4:26–5:147:08–8:25Actual Sunday pace pushing the buggy
FitFam long run (Fri, fast group)~5:00~8:00Friday club run - slower than your own easy zone on purpose
FitFam slow group (Fri, cutback wks)~6:00~9:39Lighter Friday option, 10km not 15km
Moderate / steady3:38–3:575:52–6:22Progression-run "moderate effort" segments (continuous, sustained)
Surge (fartlek pickup)3:10–3:275:06–5:33Fartlek surges (short, repeated pickups - threshold/interval-adjacent, not just "moderate")
Threshold / tempo3:24–3:315:29–5:39HM-build Mon sessions, some Sat tempo runs
10k-effort (longer reps)3:14–3:215:12–5:24Sharpening-phase Mon, building into 5k-effort (e.g. 1200m reps)
5k-effort intervals3:08–3:185:03–5:18Sharpening-phase Mon
HM race-pace3:27–3:335:33–5:42Sat progression runs, HM-build phase
Hill sprintsmax/near-max, not paceFull recovery walk-down between reps
Stridesfast/relaxed, not pace~15–20s efforts, full recovery jog between

Phase structure

PhaseWeeksDatesFocus
0. Fitness check - Wed 26 Aug 2026Odd Down 5k - fixed, not tapered for
1. Aerobic base1–917 Aug – 18 Oct 2026Build volume, varied quality (Thu, Mon from wk7), start mobility routine
2. 5k sharpening10–1419 Oct – 22 Nov 2026Quality shifts to 5k-pace/VO2max, taper into race week
5k PB attempt - Sat 21 Nov 2026, Five Arches parkrun (skip FitFam that Friday)
3. Recovery/maintenance15–2023 Nov 2026 – 3 Jan 2027Deliberately low-key over Christmas/New Year
4. HM-specific build21–284 Jan – 28 Feb 2027Threshold + HM-pace, peak volume
5. Taper29–301 Mar – 14 Mar 2027Two-week taper - skip FitFam race week
Race - Sun 14 Mar 2027, Bath Half Marathon

Full week-by-week volume plan

WkWeek startingkm (typical)mi (typical)PhaseNote

Weekly template

DaySlot
Settled 25 Sep 2026 - this pattern applies from week 7 (28 Sep); weeks 1–6 were Mon/Tue buggy runs, Wed rest, Thu quality.
MonQuality #1 speed session, solo (no buggy) - varies by phase & week, + post-quality strength routine
FixedTueEasy run with Jen before work, no buggy (no strides)
WedFlexible: default is an easy, hilly lunch run with a friend (+ 4–6 x 20s strides if running solo). If that isn’t happening, do the week’s Quality #2 here instead and make Saturday easy. Cutback/recovery weeks: just easy.
ThuRest + foundation strength routine (a Thursday run would start five running days in a row, Thu–Mon)
FixedFriLong run - FitFam club, buggy (15km fast group / 10km slow group cutback / skipped race weeks)
SatQuality #2 varies by phase & week - or, if it was done on Wednesday, an easy run at the same distance + 4–6 x 20s strides
FixedSunBuggy run, short family run - Bath Fit Fam

Session variety

Left deliberately open

Sources: Five Arches course · Five Arches records · Bath Skyline records · Fastest UK parkruns

km ↔ mile pace converter

A mile is 1.60934km. The table runs from full-sprint effort down to Mrs D's easy pace (~11:00/mile), in 10-second-per-km steps, with your own training zones flagged along the way. The 5k, 10k, HM (21.0975km) and Mar (42.195km) columns show the finish time if you held that pace for the whole race.

The mental-maths trick: ×8⁄5 (a.k.a. ×1.6)

1.60934 is close enough to 8/5 that you can do this in your head to within a second or two. Take your pace in seconds:

  • km → mile: multiply by 8, then divide by 5 (or just multiply by 1.6 - i.e. add 60% of the km pace onto itself).
  • mile → km: multiply by 5, then divide by 8 (or divide by 1.6).

Easiest anchor to memorise: 5:00/km ≈ 8:00/mile - a clean round-number pair (5×1.6=8 exactly). From there, scale: every 10 sec/km faster or slower shifts the mile pace by about 16 sec in the same direction. E.g. 4:20/km is 40s faster than the anchor, so mile pace ≈ 8:00 − 64s = 6:56 (table says 6:58 - near enough to sanity-check a watch split, not to replace it).

Second anchor worth knowing: Mrs D's 11:00/mile ≈ 6:50/km - so if you're running together and want to check you're not dragging her too fast, 6:50–7:00/km on your watch is roughly her pace.

min/kmmin/mile5k10kHMMarReference
2:304:0112:3025:0052:451:45:29Sprint / hill-sprint effort
2:404:1713:2026:4056:161:52:31
2:504:3414:1028:2059:471:59:33
3:004:5015:0030:001:03:182:06:35
3:105:0615:5031:401:06:492:13:37Your 5k-effort zone (~3:08–3:18)
3:205:2216:4033:201:10:202:20:3910k-effort (~3:14–3:21) · fartlek surges (~3:10–3:27)
3:305:3817:3035:001:13:502:27:41Threshold & HM race-pace zone (~3:24–3:33)
3:405:5418:2036:401:17:212:34:43Moderate/steady zone starts (~3:38)
3:506:1019:1038:201:20:522:41:45Moderate/steady (~3:38–3:57)
4:006:2620:0040:001:24:232:48:47
4:106:4220:5041:401:27:542:55:49Your easy/recovery zone (4:02–4:26)
4:206:5821:4043:201:31:253:02:51
4:307:1522:3045:001:34:563:09:53
4:407:3123:2046:401:38:273:16:55
4:507:4724:1048:201:41:583:23:57
5:008:0325:0050:001:45:293:30:58FitFam long run, fast group (~5:00)
5:108:1925:5051:401:49:003:38:00
5:208:3526:4053:201:52:313:45:02
5:308:5127:3055:001:56:023:52:04
5:409:0728:2056:401:59:333:59:06
5:509:2329:1058:202:03:044:06:08
6:009:3930:001:00:002:06:354:13:10FitFam slow group / cutback Fridays (~6:00)
6:109:5530:501:01:402:10:064:20:12
6:2010:1231:401:03:202:13:374:27:14
6:3010:2832:301:05:002:17:084:34:16
6:4010:4433:201:06:402:20:394:41:18
6:5011:0034:101:08:202:24:104:48:20Wife's easy pace - 11:00/mile

Table uses the exact factor (1.60934); the mental ×1.6 shortcut can drift a couple of seconds at the extremes - fine for pacing decisions, not for splitting hairs.

Strength & mobility

Two short sessions most weeks, one on Thursday (rest day; Wednesday up to week 6) and one straight after the Monday quality run (Thursday up to week 6), plus a 5 minute fallback for when a full session won't fit. No gym needed, just a mat and some floor space. Each exercise links to a short demo video since some of these will be new to you; if anything feels sharp or painful rather than just working, stop and check with a physio.

Thursday, rest day: foundation strength (10–15min)

Single-leg glute bridge
3 x 10 each leg
Watch →
Standing calf raises
3 x 15, both legs then single-leg
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Clamshells
2 x 15 each side
Watch →
Plank
3 x 30–45s
Watch →
Side plank
2 x 20–30s each side
Watch →
Dead bug
2 x 10 each side
Watch →

After Monday quality: runner power & stability (10–12min)

Bulgarian split squat
3 x 8 each leg
Watch →
Single-leg Romanian deadlift
2 x 8 each leg
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Monster walks
2 x 15 steps each direction (band if you have one)
Watch →
Side plank with hip dip
2 x 10 each side
Watch →
Bird dog
2 x 10 each side
Watch →
Standing hip flexor stretch
30–45s each side
Watch →

Quick option for busy weeks (5min)

If a full session won't fit, this covers the highest-value bit: legs and hips loosened off.

Foam rolling: calves & IT band
1–2min each leg
Watch →
Standing hip flexor stretch
30–45s each side
Watch →

These are general demonstration videos, not medical advice.