Understanding MET Levels

What is a MET?

You may have heard your cardiologist or a member of the Heart 2 Heart team reference MET levels, but you might be unsure about their significance. MET, or Metabolic Equivalent of Task, is a vital measure that helps us assess the energy expenditure of various activities based on their oxygen consumption requirements. For instance, sitting in a chair is equivalent to 1 MET, which is defined as 3.5 ml/kg/min of oxygen. Activities that exceed 1 MET represent multiples of this resting oxygen consumption rate. For example, gardening tasks like weeding require about 2 METs, indicating they demand twice the energy compared to resting.

Impact of MET Levels on Health

Did you know that increasing your MET level by just 2 METs can reduce your risk of mortality by nearly one-third? For instance, a 45-year-old male with a MET level of 10 has less than half the risk of developing cardiovascular disease compared to a peer with a MET level of 8.

Recovering from a Cardiac Event

Understanding Physical Limitations

If you are recovering from a cardiac event, you may find daily activities, such as taking a shower, to be exhausting. This is due to the relatively high MET level associated with showering, which ranges from 3 to 4. Additionally, higher water temperatures can increase the MET level further. It’s important to note that each day spent in bed can result in a 15% loss of muscle mass, which can significantly impact your exercise capacity. Consequently, after a hospital stay, you might experience fatigue during everyday tasks.

Exercise Testing and Its Importance

When you undergo an exercise test with a cardiac physiotherapist, you will receive a MET result along with your heart rate and blood pressure responses. At Heart 2 Heart, we utilize the Chester Step Test, where exercise intensity is gradually increased. Each progression typically results in an increase of about 1 MET, allowing us to accurately measure your functional capacity and monitor any signs or symptoms throughout the test.

For example, a MET level of 5 indicates that you can climb stairs comfortably but may struggle with more strenuous activities like gardening. Scoring a MET level of 5 means you can effectively perform activities at 80% of this MET level, starting with treadmill exercises at a speed of 4.0 km/h.

Improving Your MET Level

Structured Exercise Program

To enhance your MET level, engaging in a structured exercise program is essential. This includes warming up, exercising for 20 to 60 minutes within your target heart rate zone, and cooling down afterward. To determine your optimal training heart rate zone, completing an exercise test is necessary.

Educational Resources

For further insights into exercise training and its benefits, we encourage you to watch our informative 15-minute video.

Contact Us at Heart 2 Heart

If you have any questions or need assistance, please feel free to reach out to us at Heart 2 Heart.