athletic performance newsletters

NewsletterFIT tracks 5 newsletters that cover athletic performance as a primary topic, all with posts in the last 90 days. By publicly shown subscriber count, the largest are HRV4Training's Substack (45K), the morning shakeout (15K) and Masters in Motion (8K). Brands detected sponsoring these newsletters recently include Thirdzy.

Updated Oct 30, 2026 · sorted by publicly shown subscribers · methodology

  1. 1
    HRV4Training's Substack 45K subscribers

    Substack Monthly or less · last post 23 days ago

    Likely audience: Endurance coaches

  2. 2
    the morning shakeout 15K subscribers

    Substack Every two weeks · last post 16 days ago

    Likely audience: Running enthusiasts

  3. 3
    Masters in Motion 8K subscribers

    Substack Monthly or less · last post 7 days ago

    Likely audience: CrossFit athletes

    Sponsors detected: Thirdzy

  4. 4
    Weekly Hurdle 5K subscribers

    Substack Every two weeks · last post 13 days ago

    Likely audience: Marathon runners

  5. 5
    Christopher Clarey's Tennis & Beyond —

    Substack Every two weeks · last post 24 days ago

    Likely audience: Tennis fans

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