Johnson led the exercise at Business Insider’s The Long Play event in San Francisco on Tuesday. You can do it anywhere with a timer.
As a multi-sport athlete, I track my fitness through swim time trials, burnout lifts, and functional threshold power evaluations that push me to my mental and physical limit.
Bryan Johnson, the 48-year-old entrepreneur obsessed with longevity, has a … [1421 chars]
Source: Business Insider | Published: 2026-04-15T04:04:36Z
Credit: Business Insider
