Your body can't maintain peak fitness indefinitely. The adaptations that make you fast also make you fragile. High training loads accumulate fatigue. Sharpness comes at the cost of freshness.
Periodization manages this tradeoff: build fitness in structured phases, then shed fatigue before the events that matter.
The annual plan
A training year breaks into three phases:
- Preparation (3-6 months): Build the aerobic base
- Competition (2-4 months): Sharpen race-specific fitness
- Transition (2-4 weeks): Recover and mentally reset
Most amateur cyclists peak once per year (spring/summer). Targeting two peaks (spring and fall) is possible but limits how much fitness you build for each.
Phase by phase
Base (8-16 weeks)
The longest and most important phase. High volume, low intensity. 80-85% Zone 1-2. Sweet spot introduced in late base. Strength training 2-3x per week. Build volume 5-10% per week. Recovery week every 3-4 weeks.
The temptation is to skip base and jump to intervals. Don't. Base fitness determines how well you absorb intensity later. A strong base = bigger gains from intervals in the build phase.
Build (6-8 weeks)
Intensity increases. Volume stays the same or drops slightly. This is where you start the workouts that directly raise FTP and VO2max.
- Threshold intervals (2x20, 3x15)
- VO2max intervals (5x4 min)
- Sweet spot continues
- Strength training drops to 1x per week
Peak (3-4 weeks)
Race-specific preparation. Workouts simulate the demands of your target event. Volume decreases but intensity stays high. You're maintaining, not building.
Taper (1-2 weeks)
Shed fatigue, keep sharpness. Volume drops 40-60%. Intensity stays. More on this in the tapering guide.
Transition (2-4 weeks)
After the season, take real downtime. Unstructured riding, other sports, complete rest. The mental reset matters as much as the physical one.
The weekly structure
Every week within every phase follows a hard/easy pattern:
- 2-3 intensity days per week, never back-to-back
- 1-2 endurance days
- 1 long ride (weekend)
- 1-2 rest days (at least 1 complete)
More detail on structuring your week in How to Build a Weekly Training Plan.
What goes wrong
Doing intervals year-round. Without an off-season and a base phase, you burn out. Intensity without periodization is a hamster wheel.
Skipping recovery weeks. Your body consolidates gains during these. Skip them and you plateau. Recovery matters more than you think.
No specificity toward the event. A criterium racer and a gran fondo rider should follow the same base phase but very different peak phases. The training should look like the event.
Too rigid. Life happens. Illness, travel, work, family. Plans need to bend. The best plan is the one you can actually follow, not the perfect plan you execute 60% of the time.