Categories Articles Forget longevity buzzwords like Zone 2 and VO2 max, a top personal trainer says. Focus on this simple metric. Post author By crystalg Post date August 22, 2026 Business Insider Business Insider Tags Buzzwords, Focus, forget, like, Longevity, metric, personal, Says, Simple, this, Trainer, Zone’ ← Before You Blame Your Team, Run This 5-Question Audit on Yourself → UFO News Effect: Why A Third Of Americans Changed Their Minds About Aliens