Manuela Vilaseca’s 200-mile wins prove ultra success isn’t only about massive weekly mileage. With a deep aerobic base, smart cross-training, training by time, and moderated long runs, you can build durable endurance without constant mileage spikes.
Ultrarunning has long been associated with very high mileage. Many runners assume that preparing for races lasting 100 miles or more requires equally extreme training weeks filled with long runs and constant time on your feet.
But that assumption is starting to shift.
Manuela Vilaseca offers a clear example. In 2025, she won the Triple Crown of 200-milers, which includes the Moab 240, Tahoe 200, and Bigfoot 200. These races are among the most demanding endurance events in the world, often taking multiple days to complete.
She did more than win. She broke a course record by over 29 hours.
What makes her performance especially interesting is how she trained. She did not rely on traditional high-mileage weeks. Instead, she used a lower running volume combined with a broader approach to endurance training.
Her method raises an important question for everyday runners: can you prepare for an ultra without constantly increasing your mileage?
The answer is yes, but it depends on how you define “low mileage” and how you structure the rest of your training.
Low-mileage training is not a shortcut. It only works when it is built on a strong aerobic foundation developed over time.
Vilaseca emphasizes that the base phase is critical. Years of consistent endurance work allowed her body to adapt to long efforts, recover efficiently, and handle fatigue. Before focusing on ultras, she spent time in other endurance sports such as adventure racing and multi-day events.
That history matters.
A well-developed aerobic system improves how efficiently your body uses oxygen, manages energy, and delays fatigue. It also strengthens connective tissues and prepares muscles for repetitive stress. Without this foundation, reducing mileage can limit progress instead of improving it.
For newer runners, this means that consistency should remain the priority. Regular running, gradual increases in volume, and time spent building endurance are still essential. Only after establishing that base does it make sense to experiment with lower mileage and alternative training methods.
Low-mileage ultrarunning is not about doing less work overall. It is about shifting how that work is distributed.
One of the key elements of Vilaseca’s approach is reducing running volume while maintaining or even increasing total training time.
She replaces some runs with lower-impact activities such as cycling, strength training, yoga, and mobility work. This allows her to continue building endurance without placing constant stress on the same muscles and joints.
Running is a high-impact, repetitive activity. Over time, that repetition can lead to overuse injuries, especially when mileage increases quickly. By incorporating cross-training, she reduces the risk of injury while still improving overall fitness.
Each type of training contributes something different:
Together, these elements create a more balanced and durable athlete.
For many runners, this is a useful shift in perspective. Training does not have to revolve entirely around running. Endurance can be developed through a combination of activities that support the same physiological systems.
Instead of measuring progress by weekly mileage, Vilaseca tracks the total number of hours she spends being active.
This approach reflects the true demands of ultrarunning. Events like 200-mile races are not defined by pace or distance alone. They are defined by the ability to keep moving for long periods, often across multiple days.
Her training weeks can include around 30 hours of activity. Only part of that time is spent running. The rest comes from cycling, hiking, strength work, and daily movement such as walking.
Focusing on time rather than distance offers several advantages.
First, it allows for more flexibility. A long hike or bike ride can replace a run while still contributing to endurance. Second, it reduces the pressure to hit specific mileage targets, which can sometimes lead to overtraining. Third, it better prepares the body for sustained effort rather than short bursts of speed.
This method also reflects how fatigue accumulates during ultras. The body does not respond only to distance. It responds to duration and overall stress. Training by time helps simulate that reality more accurately.
Long runs remain an important part of ultramarathon training, but they do not need to be as extreme as many runners believe.
Vilaseca’s longest training runs are relatively moderate compared to the distances she races. Her longest effort in a training cycle may reach around 47 kilometers, with regular long runs closer to 30 kilometers.
This is significantly shorter than the distances many runners try to replicate in training.
The reason is recovery. Extremely long runs create a high level of fatigue that can take days or even weeks to resolve. This limits the ability to train consistently, which is more important for long-term progress.
By keeping long runs controlled, she maintains a steady training rhythm. She can train more frequently, recover faster, and avoid excessive strain.
To prepare for multi-day racing conditions, she uses alternative strategies such as participating in backyard ultras. These events involve completing a set loop every hour until you can no longer continue. They simulate extended fatigue, pacing challenges, and the mental demands of ultrarunning without requiring a single, very long run.
This approach allows her to gain specific experience while managing physical stress more effectively.
Low-mileage training can be effective, but it requires careful planning and discipline.
Reducing running volume does not mean reducing effort. The time saved from running must be replaced with meaningful training that supports endurance, strength, and recovery.
There are also practical challenges. Cross-training takes time and access to different types of activities. It may require more structure and variety than a traditional running plan.
Psychologically, it can also be difficult. Many runners associate progress with increasing mileage. Running less can feel counterintuitive, even when overall training load remains high.
Finally, this approach depends heavily on having an established base. Without it, lower mileage may not provide enough stimulus to drive adaptation.
For these reasons, low-mileage ultrarunning is best seen as an advanced strategy rather than a starting point.
Yes, but only if the rest of your training supports it.
Low mileage does not mean low effort. It means using a combination of running, cross-training, and structured planning to build endurance in a sustainable way.
If you have a solid aerobic base, stay consistent, and approach training with intention, you can prepare for long-distance events without relying on extreme weekly mileage.
Vilaseca’s results demonstrate that this method can work at the highest level.
For most runners, the lesson is simple. Mileage is just one tool. What matters more is how you use your time, how well you recover, and how consistently you train over the long term.
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