Contents
Half Marathon Training Guide: Choose and Use a First-Half Plan
For runners with an established base: check the fit of a 12-week first-half plan, understand its schedule and handle ordinary changes without cramming missed training.
Quick Hits
- •This guide focuses on a first-half completion goal for an already-running reader.
- •Check the entire schedule, including the weeks that need five running days.
- •Use the linked daily template as the schedule source; do not combine sample workouts from unrelated plans.
- •Race-day excitement and a particular longest run do not guarantee readiness.
- •Missed sessions, changed availability and insufficient preparation time call for a decision, not catch-up mileage.
Start with the runner, not the race date
This guide focuses on a first-half completion goal for someone already running consistently. It is not a couch-to-half schedule or an advanced personal-best program. Completing 21.0975 km is a different goal from racing that distance at a demanding target pace; neither is a measure of a person's worth.
The existing 12-week first-half template assumes comfortable 5–6-mile runs, approximately 15–20 miles per week, recent consistency and four available running days, increasing to five in weeks 6–9. The title “beginner” means new to the half-marathon distance, not necessarily new to running. Matching those numbers alone does not establish that the entire progression is appropriate.
If you are starting from little running, returning after a substantial interruption or aiming for a new personal best, use the plan-selection guide to compare prerequisites and goals before choosing a schedule. A three-day constraint also needs a different plan: the three-day half-marathon evidence guide explains the additional training and time assumptions behind that approach; it is not a shortcut created by deleting days here.
Check the whole schedule before choosing
- Does the opening week fit what you have actually been doing, not just one unusually good outing?
- Can you accommodate the later four- and five-run weeks, including travel, changing and recovery time?
- Does the goal fit the plan's purpose, rather than assuming a completion schedule guarantees a target time?
- Is there enough calendar time for all twelve weeks, with the race in week 12?
- Do the workload, long runs and faster sessions fit your preparation and response?
- Are symptoms, illness or other circumstances a reason to seek advice or choose a different starting point?
A mismatch is useful information. Change the plan or event rather than forcing your life and recent training into the label.
Use one daily schedule and its matching export
Open the first-half daily plan for its twelve weeks, session descriptions, long-run sequence and tracking fields. Its Print / Save as PDF control prints the displayed template; Copy to Clipboard copies that content. Keep that schedule as your reference rather than adding a second set of intervals, tempo runs or long-run prescriptions from this article.
A schedule must distinguish timed work from measured distance, and preparation and recovery from the main effort. Do not treat a time-based repetition as a fixed number of miles regardless of pace. Likewise, an optional extra outing is additional activity, not automatically part of a stated distance total. Resolve an unclear session before trying to follow it.
For context, Hal Higdon's official Novice 1 program describes its own entry assumptions and explains comfortable running and rest. It is a separate coaching program, not the source or endorsement of TrainingPlan's template. Different plans have different prerequisites and long-run choices; combining selected demanding sessions does not preserve either program.
Filled example: deciding whether the calendar fits
Hypothetical planning example, not a customer outcome: Alex has recently averaged about 18 miles per week, can comfortably complete a familiar 6-mile outing, and wants to finish a first half rather than chase a time. Alex has twelve weeks and can use four running days initially and five in weeks 6–9. This makes the template worth evaluating; it does not automatically approve its workload or predict a finish.
Alex checks the opening week against actual availability:
| Day | Listed opening-week choice | Running distance |
|---|---|---|
| Monday | Rest | 0 miles |
| Tuesday | Easy run | 4 miles |
| Wednesday | Rest or optional cross-training | 0 running miles |
| Thursday | Easy run | 4 miles |
| Friday | Rest | 0 miles |
| Saturday | Easy long run | 5 miles |
| Sunday | Easy run | 3 miles |
The four runs sum to 16 miles: 4 + 4 + 5 + 3. Optional cross-training has its own time and effort; it is not included as running mileage. This is an opening-week illustration from the daily template, not a complete twelve-week plan on its own.
Suppose Thursday's available slot disappears. Alex chooses rest and leaves the other scheduled runs unchanged: 12 running miles over three outings, not 16 miles redistributed into the weekend. The next step is to review how the week went and whether the next week's plan still fits. One example cannot establish the right adjustment after repeated disruption, symptoms or a difficult training response.
If Alex instead discovers that five running days will never be available, the solution is to select a different suitable schedule before starting—not silently omit the fifth day throughout the build while claiming to follow the original plan.
Decisions when the plan changes
| Situation | Next decision | Avoid |
|---|---|---|
| One ordinary session missed | Leave it missed or consider a move only if the wider schedule and recovery still fit | Adding its distance to another run to repair a total |
| Available days change for several weeks | Reassess the plan's frequency and workload; choose an appropriate alternative | Compressing five days into three without reviewing what that changes |
| Race date leaves less preparation time than needed | Consider a later event, a different goal or an appropriate plan for your actual starting point | Starting at a later week just because its number matches the calendar |
| A long run or faster session is repeatedly not manageable | Review preparation, effort, conditions and the schedule with suitable support | Treating difficulty as proof that you need more intensity |
| Illness, pain or concerning fatigue | Pause the calendar-driven decision and seek appropriate advice; return based on circumstances | Using a generic restart date, doubling missed sessions or treating this guide as clearance |
The recovery decision guide helps organize observations and questions. It does not diagnose the cause or decide when you are ready to train.
Keep easy running and race pacing distinct
An aspirational finish time does not determine a universal easy-run pace. A fixed “60–90 seconds slower” rule can be misleading when the target, preparation or conditions differ. Use the intended easy effort in a suitable plan, and reassess if the session becomes substantially different from what was planned.
For the race, choose a pacing strategy that fits the course, conditions and preparation. There is no automatic first-mile offset, mandatory late surge or guarantee that adrenaline and taper will bridge missing endurance. A longest-run distance is one part of the plan, not a readiness certificate.
Walking can be part of an appropriate approach. Check the event's time limits and select a plan that accounts for your intended run/walk pattern; this guide does not assign a universal ratio or predict a beginner finish-time range.
Race week, the morning and afterward
Use the race-week checklist for wave, pickup, transport, bag-check and corral deadlines. Use the race-day guide for an adjustable timeline and contingencies. Official event instructions and medical needs take priority over example times.
Food and fluids should fit expected duration, conditions, tolerance and your practiced plan. A half-marathon label alone does not prescribe a gel at a particular mile, automatic drinks at every station or a fixed heat-related finish-time adjustment. The race resources explain the relevant context.
Afterward, follow event instructions and seek help if unwell. Review recovery and your circumstances before planning the next block; there is no universal week-by-week return schedule for every finisher. A private training log can record what happened, what changed and what you want to discuss next.
Key Takeaway
Choose a plan that fits your recent training, available days and goal. Use its complete schedule, review changes and keep race execution separate from training decisions.