Mar 16, 2026Fitness MetricsCan Your Wearable’s VO2max Estimate Track Real Fitness?Wearable VO2max estimates can reflect real fitness trends, but research-grade accuracy has not transferred cleanly to Apple Watch, Garmin, or Fitbit.vo2 maxwearablescardiorespiratory fitnessheart rateRead article →
Mar 16, 2026Physical ActivityCan a Fitness Questionnaire Predict Mortality Like a CPET?Questionnaire-estimated fitness predicts mortality, but its inputs can inflate the signal. Learn when eCRF helps and when direct testing matters.vo2 maxcardiorespiratory fitnesscpetfitness assessmentRead article →