Base training: building endurance the smart way
Base training is simple, but not easy: ride mostly easy, ride often, and be patient. Done well, low-intensity volume builds the aerobic engine that supports higher FTP, faster recovery, and stronger rides all season.
Why low intensity builds big engines
The goal of base is aerobic development. Most of your time sits in easy endurance zones (often called Zone 2), where training stress is low enough to repeat day after day. The adaptations are powerful:
- More and better mitochondria to produce energy efficiently.
- Greater capillary density for improved oxygen delivery and clearance of metabolites.
- Higher fat oxidation at a given pace, sparing glycogen for hard efforts.
- Cardiac adaptations (stroke volume) that support higher watts with less strain.
These changes take weeks to show and months to mature. The payoff: for the same watts, heart rate is lower and steadier; long rides feel easier; and threshold work later in the year lifts faster.
Set the right endurance intensity
Endurance pace should feel controlled and conversational. Use the tools you have to stay honest:
- Power: 55–75% of FTP is a reliable Zone 2 range. Indoors, start at the lower half because heat elevates heart rate.
- Heart rate: roughly 65–75% of HRmax, or about 10–15 beats below your first ventilatory threshold (where talking in full sentences starts to get choppy).
- RPE: 2–3 out of 10. You should be able to breathe through your nose and hold a conversation.
A useful check is decoupling (drift): on a steady ride, if heart rate rises more than ~5% relative to power over the second half, you may be a touch too hard or under-fueled. Nudge intensity down next time or fuel better.
How much easy volume do you need?
There’s no single number, but most ambitious amateurs progress well when 80–90% of weekly time is easy. Start from your current sustainable volume and build gradually.
- Baseline: choose a weekly volume you could repeat for 3–4 weeks without fatigue spillover.
- Progression: add 10–20% time every 1–2 weeks, mostly to the long ride and one mid‑week endurance ride.
- Recovery: every 3–4 weeks, reduce volume by ~30–40% for a lighter week.
Eight-week base blueprint
Use this as a template and adapt to your life, weather, and experience. Keep most riding in Zone 2; sprinkle just enough intensity to maintain leg speed and neuromuscular sharpness.
| Week | Long ride | Weekly focus | Optional intensity |
|---|---|---|---|
| 1 | 2:00–2:30 | Establish Zone 2 pace; cadence variety | 4–6 x 8s relaxed sprints, full recovery |
| 2 | 2:30–3:00 | Add 10–15% volume | 1 x 20–30 min tempo (76–88% FTP) |
| 3 | 3:00 | Skill drills, cornering, group etiquette | 6–8 x 8s sprints |
| 4 | 2:00–2:30 | Recovery week: cut volume ~35% | None or very light strides |
| 5 | 3:00–3:30 | Rebuild volume | 2 x 15–20 min tempo |
| 6 | 3:30–4:00 | Long, steady nutrition practice | 6–8 x 8s sprints |
| 7 | 4:00–4:30 | Cadence: low torque climbs, high‑spin flats | 1 x 30–40 min tempo |
| 8 | 2:30–3:00 | Recovery/consolidation, light test week | Short aerobic test or baseline loop |
Weekly skeleton
- 2–3 endurance rides (60–120 min weekdays).
- 1 long ride building from 2 to 4+ hours at steady Zone 2.
- 1–2 short neuromuscular sprinkles per week: 4–8 x 6–8 seconds, fully easy between.
- Strength training 1–2x per week in early base (squat/hinge/push/pull/core), then 1x maintenance.
- At most 1 tempo session weekly, 20–40 minutes total, if you recover well.
- 1–2 complete rest days or active recovery spins.
Fueling and recovery that support base
Low intensity does not mean low fueling. Under-fueling wrecks consistency and blunts adaptation.
- Carbs on the bike: 30–60 g/h for rides up to 2.5 hours; 60–90 g/h for longer. Practice what you plan to use in events.
- Daily intake: on higher‑volume days, aim for 5–7 g/kg carbs, 1.6–1.8 g/kg protein, healthy fats.
- Hydration: 500–750 ml per hour with electrolytes; more indoors. Use two big fans to control heat so heart rate matches watts.
- Post‑ride: 20–30 g protein plus carbs within 60 minutes to speed recovery.
- Sleep: 7–9 hours. If volume climbs, so should sleep and easy days.
“Train low” (very low carb) can be a tool, but use sparingly and only for short, truly easy rides. Consistent quality work beats occasional heroic depletion.
How to know it’s working
- For the same watts, your heart rate is 3–8 bpm lower than a month ago.
- HR drift on long rides stays under ~5% at the same power.
- Endurance pace RPE drops; you finish long rides feeling intact, not cooked.
- Later, threshold and VO2 work bounce back faster and lift more readily.
Common mistakes and quick fixes
- Riding Zone 2 too hard: if you can’t speak in full sentences, back off a gear. Let group rides be truly easy or skip them.
- Too much intensity: keep hard work to a small fraction of weekly time in base. Save big intervals for the build phase.
- Chasing TSS over purpose: longer isn’t better if you’re fading. Hold steady watts and end rides before form crumbles.
- Under-fueling: if heart rate drifts early or you crave naps, eat more carbs during and after rides.
- Neglecting strength: two short gym sessions now prevent overuse niggles when volume spikes.
Indoor vs outdoor tips
- Indoors, reduce target power 5–10% at the same heart rate until cooling and hydration are dialed.
- Use cadence changes to stay engaged: 5–10 minute blocks at 75–85 rpm, then 90–100 rpm, same watts.
- Break long rides into steady blocks with quick off‑bike breaks to refuel and stretch.
Base training rewards patience. Put in consistent, mostly easy volume, respect recovery, and fuel the work. In a few months you’ll ride the same watts more comfortably—and you’ll be ready to raise FTP without burning the candle at both ends.
