What it takes
The half marathon is where aerobic endurance becomes the primary limiter. Your plan needs a steady progression of long runs, race-pace tempo work, and enough easy volume to build mitochondrial density without breaking down. The best plans peak 10–14 days before race day and taper deliberately.
Key workouts
- Long runs building from 8 to 13 miles over the training cycle
- Half marathon pace runs: 4–8 miles at goal pace
- Tempo intervals at threshold (3 × 2 miles with 2-minute recovery)
- Easy recovery runs to maintain volume without adding stress
Sample week
Week 10 of 14·Build Phase
5h 00m planned| Day | Session |
|---|---|
| Mon | RunEasy Run |
| Tue | RunTempo Intervals — 3×2mi |
| Wed | RunEasy Run |
| Thu | RunHM Pace Run |
| Fri | RestRest |
| Sat | RunLong Run |
| Sun | RunEasy Recovery |
How it works
1
Tell the coach your race
Share your specific event, date, weekly hours, and constraints. The coach can search the web for course details, elevation profiles, and conditions for your exact race.
2
Get a periodized plan
A 12–16 weeks plan structured by training phase — base, build, peak, and taper — with sessions tailored to half marathon demands.
3
Train and adapt
Sync Strava or import Garmin files. Sessions auto-match. Sync to Google Tasks. Adjust through conversation when life gets in the way.
Why AI coaching
- Long run progression paced to your aerobic development, not a fixed schedule
- Automatically adjusts when you need to move a long run or miss a week
- Taper length and intensity calibrated to your total training load
- Searches the web for your specific race — course details, elevation, and conditions inform the plan
Frequently asked questions
- How long is a typical Half Marathon training plan?
- A well-structured Half Marathon plan typically runs 12–16 weeks, depending on your starting fitness level.
- How many hours per week for Half Marathon training?
- Most Half Marathon plans require 5–8 hours per week, scaling up through the build phase and tapering before race day.
- Can AI build a personalized training plan?
- Yes. An AI coach builds periodized plans through conversation, adjusting for your schedule, fitness level, and race goals. Plans adapt when you miss sessions or need changes.