How to build a running training plan that adapts to you

A good running training plan is not a fixed calendar you follow blindly — it is a structure that adapts to how you respond. Here is the framework, and how to keep the load in the right zone.

The four phases

• Base. Weeks of easy aerobic volume. Boring, essential — this is where endurance is built.
• Build. Add intensity: tempo runs, intervals, threshold work. Fitness climbs fastest here.
• Peak. Race-specific sessions at goal pace. Sharpen, do not pile on volume.
• Taper. Cut load, keep intensity, arrive fresh. How to taper with TSB.

The weekly shape

Most weeks: one or two hard sessions, the rest easy, one long run, at least one rest day. The classic mistake is running the easy days too hard, which turns everything into medium — too tired to go hard, too hard to recover.

Manage the load, not just the miles

Mileage alone does not tell you how hard you are training. A Training Stress Score per run, rolled into your Fitness and Fatigue, does — it captures intensity as well as duration. What TSS is. Keep fitness rising gradually and watch fatigue so you do not dig a hole.

Let it adapt

TrainCurve scores every run and tracks your Fitness, Fatigue and Form automatically, so you can see whether the plan is working and adjust before an injury or a plateau. Start free.