Metabolic Equivalents (METs)
A bedside tool for surgical prehabilitation — screen the risk, prescribe the dose
Duke Activity Status Index — tick every activity the patient can do
0.0
DASI score (max 58.2)
9.6
Est. VO₂peak (mL/kg/min)
2.7
Estimated METs
VO₂peak = 0.43 × DASI + 9.6 · METs = VO₂peak ÷ 3.5 · Prognostic threshold: DASI 34 ≈ 6.9 METs (Wijeysundera, BJA 2020).
Build the weekly exercise prescription
| Activity (MET value) | MET | Min/session | Sessions/wk | MET-h/wk |
|---|
0.0 MET-h/wk
Progress toward protocol ceiling (~27 MET-h/wk)
Target: add ≥10 MET-h/wk above the patient's baseline, building toward ~27 (CHALLENGE dose; Courneya, Curr Oncol 2008 / NEJM 2025). Review and progress weekly.
References. Hlatky, Am J Cardiol 1989 (DASI) · Wijeysundera, Lancet 2018 & Br J Anaesth 2020 · Meyerhardt, J Clin Oncol 2006 · Courneya (CHALLENGE), N Engl J Med 2025 · Berkel, Ann Surg 2022 · Barberán-García, Ann Surg 2018 · Ainsworth, Compendium of Physical Activities.
Educational decision-support for clinicians; estimates only, not a substitute for cardiopulmonary exercise testing or clinical judgement. No patient data are stored — all calculation runs in your browser.
Dr. P. Lozano Lominchar, MD, PhD, EBPSM · HGUGM / UCM · source on GitHub