MET Levels & Cardiac Rehabilitation

Metabolic Equivalent of Task (MET)

Quantifies energy expenditure based on oxygen consumption; 1 MET equals quiet rest.

Phase I — Acute / Inpatient (Hospital)

Goal is safe resumption of basic self-care and mobility with activity demand of 1–2 METs progressing to 2–3 METs.

Monitoring in Phase I

Includes ECG, blood pressure, pulse, and symptom monitoring.

Transition requirement for Phase II

Progress to Phase II when tolerance reaches approximately 3.5 METs.

Phase II — Outpatient (Progressive Exercise)

Focuses on building exercise tolerance, starting around 4–5 METs.

Precautions in Phase II

Avoid breath-holding and heavy isometric exertion.

Phase III — Maintenance (Long-Term)

Maintains fitness with community or home-based exercises, often without monitoring.

1–2 METs (Very Light)

Activity includes bed mobility and light desk work.

2–3 METs (Light)

Includes seated warm showers, dressing, and washing dishes.

3–4 METs (Moderate-Light)

Activities like standing warm showers and light gardening.

4–5 METs (Moderate)

Might include carrying golf clubs or dancing.

5–6 METs (Demanding)

Activities such as changing bed linens or raking leaves.

6–7 METs (Vigorous)

Includes brisk walking and recreational skiing.

7–10+ METs (High Intensity)

Involves jogging, running, and competitive sports.

Core Energy Conservation Principles

Strategies including posture, demand, environment, grading, and clinical application to conserve energy.

Energy conservation principle of posture

Tasks seated require less energy than standing.

Upper Extremity Demand in tasks

Sustained overhead movements require more cardiovascular effort than lower-body movements.

Impact of environment on energy demand

Extreme temperatures elevate cardiac workload.

Grading & Modification strategy

Involves task simplification, rest breaks, and pacing.

Clinical Application of METs

Match activities to client symptoms and tolerance rather than relying solely on MET values.