Training Plan Generator
Generate a personalized multi-week running plan based on your goal race, current fitness level, and available training days. Powered by Jack Daniels VDOT methodology.
Build Your Plan
Enter your goal race and current fitness to generate a training plan.
How This Training Plan Generator Works
This tool creates a periodized training plan using proven coaching methodologies. Here's how it builds your plan:
1. Fitness Assessment via VDOT
From your recent race time, we estimate your VDOT (a measure of running fitness developed by Dr. Jack Daniels). This determines your optimal training paces for each workout type — easy, marathon, tempo, interval, and repetition.
2. Periodized Structure
Your plan is divided into four phases, each with a specific purpose:
- Base Phase (weeks 1–25%): Build aerobic foundation with easy running and strides
- Build Phase (weeks 25–60%): Introduce quality workouts — intervals and tempo runs
- Peak Phase (weeks 60–85%): Race-specific work at target intensity
- Taper Phase (final 15%): Reduce volume while maintaining intensity to arrive fresh on race day
3. Progressive Overload
Weekly mileage increases gradually through each phase, peaking during the peak phase before dropping for taper. The plan respects the 10% rule — never increasing total volume by more than 10% week-over-week.
Training Pace Zones Explained
| Zone | Effort | Purpose | % of Max HR |
|---|---|---|---|
| Easy (E) | Conversational | Aerobic base, recovery | 65–75% |
| Marathon (M) | Comfortable-hard | Marathon-specific endurance | 75–84% |
| Tempo (T) | Comfortably hard | Lactate threshold | 84–88% |
| Interval (I) | Hard | VO2max development | 95–100% |
| Repetition (R) | Very hard (short) | Speed & running economy | N/A (speed-based) |
Tips for Following Your Plan
- Easy means easy. Most runners go too fast on easy days. If you can't hold a conversation, slow down.
- Don't skip the long run. It's the most important session for half marathon and marathon training.
- Listen to your body. If you're unusually fatigued, take an extra rest day rather than pushing through.
- Be consistent. 80% of your training should be at easy pace. The quality sessions provide the stimulus; easy running absorbs it.
- Taper trust. The taper phase will feel easy — that's the point. Your fitness doesn't disappear in 2 weeks.
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Frequently Asked Questions
How many weeks do I need to train for a marathon?
Most coaches recommend 12–20 weeks for marathon training, depending on your current fitness. Beginners should allow at least 16 weeks. If you've been running consistently, 12 weeks may suffice for a half marathon or shorter race.
Can I run more days than the plan suggests?
Stick to the plan's training days initially. If you feel good after 3–4 weeks, you can add an extra easy day. Never add more quality sessions — the plan balances stress and recovery deliberately.
What if I miss a week of training?
If you miss less than a week, pick up where you left off. If you miss 1–2 weeks, drop back one week in the plan. Missing more than 2 weeks means you should reassess your goal time and possibly restart the plan.
Should I do cross-training on rest days?
Light cross-training (swimming, cycling, yoga) on rest days is fine and can aid recovery. Keep the intensity very low — rest days exist to let your body adapt to the training stress.
How accurate are the predicted training paces?
The paces are derived from the Jack Daniels VDOT system, which has been validated with thousands of runners. They work best when your input race was a maximal effort in the last 4–6 weeks on a flat course in good conditions.