endurance training newsletters

NewsletterFIT tracks 3 newsletters that cover endurance training as a primary topic, 2 of them with posts in the last 90 days. By publicly shown subscriber count, the largest are The Science of Maximal Athletic Development (26K) and The Hybrid Letter (13K).

Updated Oct 31, 2026 · sorted by publicly shown subscribers · methodology

  1. 1
    The Science of Maximal Athletic Development26K subscribers

    SubstackEvery two weeks · last post 21 days ago

    Likely audience: Endurance athletes

  2. 2
    Rich Tales—

    SubstackEvery two weeks · last post 11 days ago

    Likely audience: fitness enthusiasts

  3. 3
    The Hybrid Letter13K subscribers

    Substacklast post Dec 19, 2025

    Likely audience: hybrid athletes

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