Coaching practices for Aerobic Base Building

Describe almost anything you are working through and IX Coach finds the practices whose real-world fit is closest. For Aerobic Base Building, these are the strongest matches in the current practice library.

Does this sound like the set of challenges you might be facing?

• I think my easy runs are supposed to feel easy, but I always seem to drift into puffing too hard to talk
• Every workout I do is moderately hard and leaves me a bit wrecked, and my fitness has plateaued
• Every workout I push until I’m gasping because that feels like the only thing that counts, and I’m starting to wonder if I’m skipping the slow, easy hours that actually build the engine I keep trying to redline.
• I keep hammering hard sessions and saw quick gains, but now I’ve plateaued and I’m wondering if all my easy runs are wasted time
• I’ve been logging plenty of easy miles and my aerobic base feels solid, but the top-end number won’t climb

Practices that may help

1. Train at conversational pace for aerobic base
   Keep effort low enough to speak in full sentences — the sweet spot for building aerobic capacity.
   The Talk Test: Gauge Exercise Intensity Without a Monitor
2. Zone 2 training to build aerobic base
   Low-intensity, sustainable aerobic exercise performed 3–4 hours per week develops mitochondrial density — the foundation of a high VO2 max.
   VO2 Max and Longevity: Training Your Aerobic Ceiling
3. Build a zone 2 aerobic base
   Log 3–4 hours per week of low-intensity aerobic exercise to develop mitochondrial density and fat-oxidation capacity.
   VO2 Max and Longevity: The Peter Attia Framework
4. Build aerobic base with easy running to raise the VO2max ceiling over time
   High-intensity intervals raise VO2max faster in the short term; aerobic base training raises the long-run ceiling.
   VO2max Training
5. VO2 max intervals (Zone 4–5) to push your aerobic ceiling
   Four-minute intervals at near-maximal effort, repeated 4–6 times, are the most efficient way to raise your VO2 max.
   VO2 Max and Longevity: Training Your Aerobic Ceiling
6. VO2 max intervals
   Use 4–8 minute high-intensity intervals at near-maximum effort to directly stress and expand your oxygen ceiling.
   VO2 Max and Longevity: The Peter Attia Framework
7. Breath-hold walk — simulate altitude during exercise
   Hold your breath after an exhale while walking to build CO2 tolerance and trigger mild hypoxic adaptation.
   The Oxygen Advantage, Made Practical
8. Pair zone 2 with occasional high-intensity work in an 80/20 polarized structure
   Most training volume in zone 2, a small fraction at near-maximal intensity — skip the moderate middle.
   Zone 2 Training
9. Polarized training distribution for sustainable VO2 max gains
   Spend 80 % of training time in Zone 2 and 20 % in Zone 4–5 — the combination elite endurance athletes and longevity-focused medicine both support.
   VO2 Max and Longevity: Training Your Aerobic Ceiling
10. Staircase sprints as a cardiovascular exercise snack
    Three 20-second all-out stair climbs, three times a day, measurably improves aerobic capacity.
    Exercise Snacks: Short Bursts of Movement That Actually Work

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