Running Weekly

Stringbean takes the John Muir Trail record

Joe McConaughy covered the 223-mile John Muir Trail in 2 days and 16 hours, cutting more than three hours off Francois D'Haene's 2017 mark. Plus a muscle study that says hard intervals leave a mark.

Races and results

How they train

Study says muscle keeps an epigenetic memory of interval training

A paper in AJP-Cell Physiology reports that human skeletal muscle possesses an epigenetic memory of high-intensity interval training, from Andrea M. Pilotto and colleagues. Brady Holmer calls it one of his favorite studies of the last year.

Brady Holmer
@Brady_H
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One of my favorite studies to come out in the last year.
Sep 23, 2026 · View on X

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