WHO THIS IS FOR
IS THIS YOU?
The rider planning their annual structure
You're deciding how to divide the year and want to know how much time to protect for base.
The rider who always cuts base short
You get bored of easy riding after six weeks and start intervals. Every year ends the same way.
THE ROADMAN VIEW
The Roadman view
Riders consistently underestimate how long the base needs to be because the payoff isn't visible during the phase itself. You don't feel faster. Your test numbers don't move much. You just feel... fine, and a bit bored. The gains from base training are running in the background, and they only become visible once intensity starts in the build phase.
Joe Friel's guidance is clear on this: don't rush to build. The base phase is not a waiting room before the real training starts — it is the real training. The mitochondrial density and fat oxidation you build in those 12–16 weeks are what allow threshold work to produce meaningful adaptation later. Cut the base to eight weeks and you'll get early build gains; cut it to four and you'll plateau by April wondering what happened.
If the calendar genuinely doesn't allow 16 weeks, protect 12. If it doesn't allow 12, protect 10. But never compress the base below 8 weeks and jump straight into full build intensity. You'd be better served staying in base a little longer and shortening the peak taper.
EXPERT EVIDENCE
WHAT THE EXPERTS SAY
- Joe FrielAuthor of The Cyclist's Training Bible; co-founder of TrainingPeaks
The base period is non-negotiable in length because the adaptations it builds — aerobic capacity, fat oxidation, structural resilience — accumulate on a time scale of weeks to months. Athletes who compress base phases typically see early build gains followed by stagnation or breakdown.
Hear it: Joe Friel's Cycling Training Plan Structure | Roadman Cycling - Professor Stephen SeilerExercise physiologist, University of Agder
Across elite endurance athletes studied longitudinally, the volume of genuine easy aerobic work done in the preparation phase is one of the strongest predictors of high-intensity adaptation later in the season. More base time doesn't just help — it amplifies what follows.
Hear it: 80/20 Training to Ride Faster | Dr Stephen Seiler
PRACTICAL APPLICATION
DO THIS WEEK
Block 12–16 weeks in your calendar first
Before planning any build or peak phase, reserve 12–16 weeks from late autumn or early winter for base. This is your non-negotiable time investment in the season.
Progress within the base phase
Base isn't just riding the same volume for 16 weeks. Add 10% volume every three weeks, take a deload week at week four, then build again. Progressing within base keeps the stimulus moving without introducing premature intensity.
Use the final 2–3 weeks of base for low-level intensity
In the last 2–3 weeks of base, introduce one session per week of tempo riding (76–83% FTP) to begin bridging toward the build. This is not full build intensity — it's a controlled transition.
COMMON MISTAKES
WHAT CYCLISTS GET WRONG
MISTAKEStarting the build phase after only 6–8 weeks of base because progress feels slow.
FIXThe gains are happening below what you can measure day-to-day. Commit to the full 12 weeks before assessing.
MISTAKEAdding multiple hard sessions 'just to maintain intensity' during base.
FIXOne modest intensity session per week in the final base weeks is fine. More than that means you're not in base — you're in an undescribed limbo phase.
MISTAKEUsing the same 12-week base length regardless of event distance.
FIXLonger events — gran fondos, ultras — benefit from longer base phases. A rider preparing for a 200km event needs 16 weeks; a rider targeting a 40km time trial can manage with 12.
FAQ
FREQUENTLY ASKED QUESTIONS
Can I do base training in 8 weeks?
What should the base phase look like on a weekly basis?
Do masters cyclists need a longer base?
Should I ride indoors or outdoors during base?
What happens if I miss weeks during the base phase?
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