Category
Build durable aerobic fitness with clear guidance on easy volume, progress signals, base-versus-build timing, and adding intensity without losing consistency.
3 articles
Curated path
Understand the adaptation first, then judge progress, time the build phase, and add intensity without crowding out easy volume.
Aerobic base training is the controlled, repeatable endurance work that builds durability below your first threshold. Learn what it is, how it works, and how to use it without turning every session into a slow grind.
Base training is working when easy efforts become more efficient, long sessions drift less, recovery improves, and your weekly training becomes more repeatable. Learn which signals matter and which ones mislead.
Archive
Read the guides as a focused product lane, then bring the decision back to the Training Log.
Most athletes can feel early aerobic base changes in a few weeks, but a durable base usually takes months. Learn the realistic timeline, what changes first, and how to know your base is improving.
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iPhone product context
The blog explains the training decisions that Zone Training Log keeps visible inside the iOS-style product.
Training Log
Daily review, rest days, and workout cards stay close to the iPhone product.
Summaries
Long-range zone context for runners, cyclists, and mixed training blocks.
Settings
Apple Health, account sync, providers, and billing sit in one calm product family.
