Grip Strength and Healthspan: What the Cohort Data Shows
Grip strength, gait speed, sit-to-stand and VO2max predict mortality more strongly than most consumer health metrics, and prediction is not the same as cause.
Niche
Longevity
Healthspan, biological ageing, and the interventions with evidence behind them.
Blue Zones Reassessed: What Holds Up and What Does Not
The longevity-hotspot idea rests on birth records that in many regions were never reliable, and the lifestyle findings that survive that problem survive on other evidence entirely.