Device

Single-variable testing

Test one thing at a time, on and off twice, or you're guessing.

Focus · Device · members

Gait speed

Time your usual walking pace once a year. Then train the legs and lungs behind it.

Vitality · Device · members

Grip strength

Buy a dynamometer. Test once a year. Don't train grip and call it longevity.

Strength · Device · members

VO2max as a biological-age marker

Read the fitness age on your watch as this quarter's report, then go move it.

Vitality · Device · members

Phenotypic Age

Run Phenotypic Age off a normal blood panel, then fix the worst marker, not the score.

Vitality · Device · members

N-back task

Cancel the brain-training app. You'll only ever get better at the app.

Focus · Device · members

Cambridge Brain Sciences

Use it to measure your head, never to train it. Practice moves the score, not you.

Focus · Device · members

Resting metabolic rate testing

Skip the metabolic test. What you burn at rest tracks the muscle you carry.

Metabolism · Device · members

DEXA

Trust the DEXA bone number. Judge body fat only against your own last scan.

Strength · Device · members

Whole-body MRI screening

Don't book the full-body scan. It finds things that were never going to hurt you.

Vitality · Device · members

VO2max testing

Pay for one real treadmill test. Your watch is guessing at the number.

Vitality · Device · members

Coronary artery calcium score

Book the calcium scan. It's the number that decides the statin.

Vitality · Device · members