| Factor | High Volume (Low Intensity) | High Intensity (Low Volume) |
|---|---|---|
| Weekly time needed | 5-15+ hours | 2-5 hours |
| Intensity | Zone 1-2 (conversational) | Zone 4-5 (very hard) |
| Aerobic base | Excellent | Maintains, doesn't build |
| FTP improvement | Gradual | Faster short-term |
| Recovery | Low fatigue | High — needs 48-72h |
| Best phase | Base / foundation | Build / peak |
| Risk | Low | Higher burnout if overused |
Choose High Volume (Low Intensity) when…
You have time to ride frequently (5+ hours/week), are building a long-term aerobic base, are training for long endurance events (gran fondos, Ironman cycling leg), or in a base phase before adding intensity.
Choose High Intensity (Low Volume) when…
You have limited training time (2-4 hours/week), want fast fitness gains, are past the base-building phase, or are targeting shorter cycling events with high-power demands.
Gear for both
Heart Rate Monitor
Track Zone 2 heart rate accurately for effective aerobic base work.
Check price on AmazonCycling Interval Training Book
Structure your high-intensity intervals for maximum FTP gains.
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FAQ
Should I ride easy or hard to improve?
Both — but most of your volume should be easy (Zone 2) and targeted hard efforts (Zone 4-5) done specifically. The most common amateur mistake is training at moderate intensity (Zone 3) most of the time — too hard to recover from easily, too easy to produce strong adaptations.
What is polarised training for cyclists?
Polarised training distributes effort at two extremes: approximately 80% of training at low intensity (Zone 1–2, conversational pace) and 20% at high intensity (Zone 4–5, very hard efforts). The 'moderate intensity' middle zone is deliberately minimised. Research by Stephen Seiler found this distribution characterises elite endurance athletes' actual training and produces better outcomes than spending large amounts of time at moderate intensities. Many cyclists over-train in the middle zone — hard enough to accumulate fatigue but not hard enough to generate high-intensity adaptations.
How many hours per week do amateur cyclists train?
Most recreational cyclists ride 3–8 hours per week. Serious amateur racers typically train 8–15 hours per week. Elite amateur cyclists competing at national level may reach 15–20+ hours. Professional cyclists in stage race preparation commonly train 20–30 hours per week. Research consistently shows diminishing returns above roughly 12–15 hours per week for non-professional athletes — recovery capacity limits further adaptation.