CPET (Cardiopulmonary Exercise Testing)
A graded exercise test measuring combined heart, lung, and metabolic function under increasing physical load, used to guide individualized pacing.
What it is & how it works
A graded exercise test — typically on a treadmill or cycle ergometer — that measures combined heart, lung, and metabolic function under increasing physical load, including VO2 max and ventilatory threshold, via a metabolic cart and continuous ECG monitoring.
How it's done
Conducted under direct supervision by an exercise physiologist or physician, typically lasting 20–30 minutes including warm-up and recovery, with the patient wearing a breathing mask/mouthpiece, ECG leads, and a blood-pressure cuff. Contraindications are screened for before the test begins.
Conditions it treats
Why Unfold Longevity
Used to guide individualized pacing and exercise prescription rather than as an isolated fitness score, reflecting Unfold Longevity's individualized-outcomes model.
Evidence & safety
Established diagnostic methodology with a long clinical track record.
Related questions
Yes — typically no food or drink other than water for about 4 hours before, no caffeine for 24 hours, and no smoking or vaping for 8 hours, along with comfortable exercise clothing and footwear. Your care team will confirm any medication adjustments in advance.
CPET is a well-established, closely supervised test with a long safety record; the most common effects are breathlessness and muscle fatigue from the exertion itself, and serious complications are rare. It isn't performed in people with certain acute conditions — such as a recent heart attack, uncontrolled severe hypertension, unstable heart valve disease, or advanced pregnancy — and contraindications are screened for beforehand.