Why Aerobic Base Matters

Japanese long-distance runners are renowned worldwide for their consistency, longevity, and ability to perform across a wide range of distances. Much of this reputation is built on one foundational principle: a deep, patient aerobic base. Before adding speed work, interval sessions, or race-specific training, elite ekiden athletes spend months — sometimes entire seasons — focused almost exclusively on building aerobic capacity.

This approach stands in contrast to training models that prioritise fast workouts early. The Japanese philosophy is rooted in the belief that the aerobic engine must be fully developed before it can be effectively trained at higher intensities.

The Volume-First Approach

Corporate running team programmes in Japan typically involve high weekly mileage as the cornerstone of an athlete's preparation. While exact figures vary by team and individual athlete, it is common for elite runners in the jitsugyōdan system to log substantial distance at easy to moderate effort during base-building phases.

For recreational and club runners, the key takeaway is not to mimic elite volume directly, but to prioritise consistency over intensity. Running frequently at an easy, conversational pace builds the capillary networks, mitochondrial density, and metabolic efficiency that underpin all distance running performance.

Easy Running: More Than It Appears

One of the most misunderstood aspects of Japanese training culture is the role of easy running. Runs performed at genuinely easy effort — where you can hold a full conversation — are not "junk miles." They are the primary stimulus for aerobic adaptation. The principle is simple: most of your running time should be spent at an intensity that allows your body to recover while still building aerobic capacity.

  • Run at a pace where breathing is comfortable and rhythmic
  • Resist the urge to push the pace on easy days
  • Aim for a consistent weekly schedule rather than sporadic high-effort runs
  • Allow at least one full rest or recovery day each week

Long Runs: The Weekly Anchor

The weekly long run is a staple of any endurance programme, and ekiden training is no exception. Long runs build mental resilience, teach the body to use fat as fuel more efficiently, and prepare the musculoskeletal system for the demands of relay and road racing.

For base-building purposes, the long run should be kept at easy effort. Gradually extending the duration — rather than the pace — is the goal. A useful guideline is to increase long run distance by no more than 10% per week, and to follow every two to three weeks of progression with a reduced-volume recovery week.

Incorporating Strides and Short Accelerations

Even during base-building phases, short bursts of faster running — known as strides — are valuable. After an easy run, 4–6 x 20-second smooth accelerations (not sprints) help maintain neuromuscular coordination and a sense of leg speed without adding significant physiological stress. Japanese training groups often include these as a matter of routine, regardless of the training phase.

Patience Is the Training

Perhaps the most important lesson from Japanese ekiden culture is the value of patience. Building a genuine aerobic base takes months, not weeks. The runners who compete year after year at the highest ekiden levels are those who have developed their foundations carefully and systematically. For any runner at any level, this long-term perspective is the most powerful training tool of all.