Duathlon Long Distance Base Plan 12 Weeks is a 12-week triathlon plan. This article combines the actual plan description with a example week from the stored workout entries.
What this plan is built for
This 12-week Base Plan is the kickoff for your preparation. The first weeks serve as a re-entry into training after the offseason and primarily focus on motor skills. After that, the goal is to build your engine - meaning to increase your VO2max.
The structure of the plan is designed for consistency. You can recognize this by the 3-1,2-1 structure. So, training on Tuesday, Thursday, and Saturday+Sunday, with recovery on Monday and Friday.
You should try to adhere to this structure, even if appointments or spontaneous commitments disrupt your weekly schedule. Only through the combination of training and adherence to recovery days will the desired adaptations occur in the body. If you change the structure and train several days in a row without a break, the risk of illness or injury increases significantly. This can lead to system breakdown and disrupt consistency. However, with consistency comes performance! Therefore, if your schedule does not allow it, it is better to skip 1-2 sessions per week and maintain the remaining sessions week after week. This consistency will ultimately lead to success.
Training logic and load
The emphasis is durable base fitness, clean technique, and a rhythm you can repeat for several weeks. The important part is not upgrading easy days into hidden hard days. The workout data shows which sessions are structured and which ones are intentionally simple.
The plan contains 129 scheduled entries across 12 weeks. The sequence matters as much as the total hours: hard, technical, or long workouts only work when the surrounding days allow you to absorb them.
Example week: Week 6
This week is not a generic template. It is built from the actual training plan entries, and the workout charts use the stored workout data.
10 min @ 50% | Ramp from 55% to 75% | Ramp from 75% to 55% | Ramp from 55% to 75% + 2 more steps
This workout comes directly from the training plan.
Perform a 45-minute athletic / stability training session. Typical exercises may include: - Lunges - Squats - Superman - Push-ups - Leg raises - Plank - Side plank - etc.
30 min @ 75% | 8x 0 min on / 1 min easy | 5 min @ 70% | 8x 1 min on / 2 min easy + 1 more step
The goal is to optimize fat metabolism and to train motor skills with the strides while activating the "fast" muscle fibers without producing too much lactate.
16 min @ 60% | Ramp from 60% to 85% | 5 min @ 50% | 7x 1 min on / 1 min easy + 5 more steps
Training goal: Introduction to HIIT training. The aim is to increase your VO2max.
Ramp from 50% to 80% | 4x 5 min on / 5 min easy | Ramp from 70% to 50%
HR: approx. 60-70% of HRmax. Perceived exertion: 4-5 out of 10 Cadence target: 85 to 95 rpm Effect: Mitochondrial biogenesis, muscle fiber shift, improvement in fat metabolism LIT is not the same as FatMax.
20 min @ 70% | 5x 1 min on / 1 min easy | 5 min @ 70% | 5x 1 min on / 1 min easy + 3 more steps
The goal of the hill runs is to improve your sub-distance performance and enhance anaerobic capacity.
Perform a 45-minute athletic / stability training session. Typical exercises may include: - Lunges - Squats - Superman - Push-ups - Leg raises - Plank - Side plank - etc.
50 min @ 70%
This run primarily serves to activate and is intentionally run at a relaxed pace in the lower GA1 zone.
2:30 h @ 60%
Training goal: Base endurance sessions make up the largest part of duathlon training.
80 min @ 75% | 20 min @ 85%
Calm base run with final acceleration This run primarily serves to optimize fat metabolism, as well as to finish developing pace endurance.
Perform a 30-minute mobility/Blackroll session. Warm up with a mobility routine focusing on: - Hip flexors - Gluteus/Buttocks - Hamstrings - Achilles tendon + Calf - Ankles - Lower back - Shoulders - Chest muscles Following the mobility, do
How to read the workout charts
The chart is based on the workout data: longer segments take more width, higher intensities sit higher, and harder work is marked with stronger colors. For swim or distance-based segments, the graphic represents the planned sequence rather than GPS data.
Practical execution
What to watch
- Execute the key days precisely instead of making the easy sessions faster.
- Use the plan description as context: equipment, fueling, mobility, and realistic threshold values are part of the training.
- When life or fatigue adds pressure, trim secondary work first and keep the most important session stable.
Training effect
Executed well, the plan improves your ability to absorb the intended stimulus repeatedly. Depending on sport and phase, that means more aerobic stability, better pace durability, stronger technique under fatigue, or more confidence at target effort.