The Norwegian 4x4: the interval workout with the best evidence
The Norwegian 4x4 interval workout explained: what the Generation 100 trial of 1,567 older adults found, what it didn't prove and how executives can use it.
A Cinder series
Executive Athletics
Training for people with full calendars: Zone 2, VO₂ max, strength after 40, rucking, BFR and flow, with the research behind each and the minimum effective dose.
VO2 max and longevity: the fitness number most linked to a longer life
VO2 max and longevity: a 122,007-patient study found low fitness carried as much mortality risk as smoking. What the data shows and how founders can improve it.
Zone 2 training for busy executives: what it is and what the evidence supports
Zone 2 training for busy executives: what the heart rate zones mean, what the fitness and mortality data show, and how to fit easy cardio into a full week.