Training phases for runners: foundation to race preparation and taper

Phase 1: Foundation (4 to 6 weeks)

Target: aerobic durability, heat adaptation and tissue conditioning. Volume: high, and mostly Ground. Control comes in carefully. Threshold is absent, or one session a week at most for a runner with a prior base.

Edge work is present from week 1 as hill sprints, once a week with full recovery. It is a small start on a slow process, the speed ceiling. See hill sprints.

In this phase you will often feel like you are not doing enough, and your instinct will be to add intensity. A coach's job is to hold the structure and explain why. Foundation done well makes every later phase more productive.

Phase 1 ends when you can run 5 days a week at Ground for 4 weeks in a row, with no tissue irritation building up, a stable resting heart rate and good energy on easy days.

Phase 2: Development (4 to 6 weeks)

Target: fatigue resistance and Threshold tolerance. Volume: kept from Phase 1. Control increases, Threshold rises to one or two sessions a week and Ground stays the majority.

This is where the pace ladder starts. Work faster than goal pace (Edge) and slower than goal pace (Control) are both present, on purpose, so every rung is built at the same time.

Quality sessions are protected. If your available capacity drops to level 2 or lower on a planned quality day, the session converts to an easy run. No exceptions. A forced quality session when you are depleted can set the whole phase back.

Phase 3: Race preparation (3 to 5 weeks)

Target: race-specific work and the meeting of the pace ladder. Volume: a slight reduction, so quality sessions land on fresher legs. Quality is the priority.

By now you have spent 8 to 12 weeks building the rungs above and below goal pace. Goal pace becomes the training target, and it should feel more controlled than if you had started there.

Taper: the final 2 to 3 weeks

In a taper, volume comes down while intensity and frequency stay. The aim is to let the adaptation show up while the fatigue clears. A common taper mistake is cutting both volume and intensity, which takes away the sharp work that keeps race-specific movement patterns tuned.

Research points the same way. A 2023 systematic review and meta-analysis of tapering in endurance athletes concluded that a taper of 21 days or less works, with training volume cut progressively by 41 to 60% and intensity and frequency left unchanged.

Deload weeks

Inside a block, deload weeks cut volume so structural load can clear and your adaptation can settle. A deload is part of the plan, not a step back.

The order fitness is built in

Across all phases, Athlevo builds four qualities in a fixed priority order. Each one gives the next one something to stand on.

1. Aerobic durability. The ability to repeat submaximal training week after week without carrying unresolved fatigue. Built with months of consistent Ground running. For runners in hot climates this includes heat adaptation.
2. Fatigue resistance. Holding form, rhythm and controlled output as fatigue builds. Built with Control work and the later part of long runs. Athlevo treats half marathons and marathons as mainly fatigue management problems.
3. Threshold tolerance. Holding controlled pressure near your threshold without destabilizing your aerobic system. Introduced only after the first two are stable, and always rationed.
4. Neuromuscular speed. Economy, leg speed and sharpness. It starts small from week 1 as hill sprints. As a race-sharpening tool, it comes last.

If you feel flat late in a block, the likely answer is recovery, not more Edge work.