Half Marathon Training Plan: Returning from Injury
A graduated 16-week half marathon plan for runners rebuilding after injury: conservative load ramps, walk-run reintroduction, and checks to prevent re-injury.
The plan, week by week
Minutes per week. Tap a week.The half marathon rewards aerobic engine more than raw speed. The runners who struggle most are those who train like 5K runners, carrying too much intensity and not enough easy aerobic volume. Sustainable progression, quality long runs, and one threshold session per week is the formula that holds up across conditions. This plan is built for runners returning from injury: the structure, pacing guidelines, and weekly progression are calibrated to your specific situation, not a generic template.
How long a half marathon comeback should take
Getting back to half marathon fitness after injury usually takes longer than runners hope. Easy running needs to feel normal first, and then the long run has to build steadily towards 16 to 18 km. Depending on how long you were out and what the injury was, that can take several months, and it varies a lot from person to person. Pick a race far enough away that you are not forced to rush. If the date is close and you are not ready, it is better to switch to a shorter race, or run the half at an easy effort, than to cram in long runs. Your physio can help you judge the timeline.
Choosing routes for half marathon long runs after injury
Longer runs mean longer exposure to whatever your route throws at you. Steep downhills, sloping pavements and hard concrete can all aggravate an area that is still settling. While you rebuild, plan half marathon long runs on flat or gently rolling routes, mix in trails or park paths where you can, and switch sides of the road on out-and-back routes so the camber evens out. Rotating between two pairs of shoes can spread the load a little too. If your goal race is hilly, add hills only once the long run is close to full length and pain-free. Add climbs before descents, because running downhill loads the legs more.
The most important principle: tissue tolerance over fitness
When returning from injury, the limiting factor is not your cardiovascular fitness — it's your tissue's ability to tolerate load. Tendons, bones, and connective tissue adapt more slowly than your heart and lungs. This means you'll feel aerobically capable of running more before your tissues are ready for it. Progressing load based on tissue response, not perceived effort, prevents the re-injury cycle that traps many comeback athletes.
Walk-run as a professional tool, not a crutch
Walk-run intervals are not a beginner technique — elite athletes returning from serious injury use them as a controlled way to introduce impact without spiking load. The walk intervals are active recovery that maintains forward progress while reducing cumulative stress on healing tissue. This plan uses walk-run structure early and phases it out as you demonstrate tolerance, not as soon as you feel capable.
Red flags that warrant stopping
Sharp or localised pain during a run (as opposed to general muscle tiredness), pain that worsens during a session, any bone pain, and pain that persists more than 24 hours post-run are signals to stop, rest, and consult a physio or sports medicine doctor before continuing. This plan is not medical advice. Use it in conjunction with the guidance of your treating clinician.
Training philosophy
The half marathon rewards aerobic engine more than raw speed. The runners who struggle most are those who train like 5K runners, carrying too much intensity and not enough easy aerobic volume. Sustainable progression, quality long runs, and one threshold session per week is the formula that holds up across conditions.
Questions
How many days per week does this half marathon plan require?
Most sessions in this plan run four to five days per week, including one quality session, a long run, and easy aerobic running. The plan is designed to be adjustable — with Daash, Claude can restructure it around your available days each week.
Do I need a GPS watch to follow this half marathon training plan?
A GPS watch or running app is helpful for tracking pace and distance, but not strictly required. Effort-based running (using a scale of 1–10 perceived exertion) works well for easy runs. For quality sessions where specific paces matter, a watch becomes more valuable.
What should I eat before a long run?
For runs under 60–75 minutes, eating beforehand is optional. For longer runs, a light carbohydrate-based meal two to three hours before the session — oats, toast with banana, or a rice-based option — provides fuel without gastrointestinal issues. Avoid high-fat, high-fibre, or unfamiliar foods on long run mornings.
How does Daash adapt the plan if I miss a session?
Daash sees missed sessions in your Garmin data. Tell Claude why — illness, fatigue, life — and it reworks the coming week: redistributing sessions, reducing volume if needed, or adjusting the next quality session, then updates the workouts on your watch.
When should I see a physiotherapist rather than following this plan?
See a physiotherapist if you experience sharp or localised pain during running, pain that worsens during a session, any bone pain, swelling, or pain that persists more than 24–48 hours after a run. This plan provides general guidance for graduated return to running; it is not a substitute for individualised clinical advice.
Do I need to take gels or nutrition during training for a half marathon?
For long runs over 75–80 minutes, practising race nutrition is valuable. Train with the gels, chews, or drinks available at your target race so your gut is adapted before race day. Do not try a new nutrition product for the first time on race morning.