1 Met = 1 Kcal/kg/hr

4 min read Jun 11, 2024
1 Met = 1 Kcal/kg/hr

1 MET: Understanding the Energy Expenditure Unit

In the realm of exercise physiology, understanding the concept of energy expenditure is crucial. One of the fundamental units used to measure energy expenditure is the Metabolic Equivalent of Task (MET). But what does 1 MET exactly mean, and how is it related to kilocalories per kilogram per hour (kcal/kg/hr)?

Defining 1 MET

A MET is a unit of measurement that represents the energy cost of a specific activity. It is defined as the amount of oxygen consumed by the body while performing a particular task or activity. In simpler terms, 1 MET is equivalent to the energy expended by the body at rest, which is approximately 3.5 milliliters of oxygen per kilogram of body weight per minute (mL/kg/min).

The Equation: 1 MET = 1 kcal/kg/hr

Now, let's dive into the equation that relates 1 MET to kilocalories per kilogram per hour. The conversion factor is as follows:

1 MET = 1 kcal/kg/hr

This equation indicates that for every 1 MET of energy expenditure, the body expends 1 kilocalorie per kilogram of body weight per hour. This means that if an individual weighs 70 kilograms, they would expend 70 kilocalories per hour while performing an activity with an energy expenditure of 1 MET.

Practical Applications

Understanding the relationship between 1 MET and kcal/kg/hr has significant implications in various fields, including:

  • Exercise Prescription: By knowing the MET value of a particular exercise, fitness professionals can estimate the energy expenditure of their clients and design personalized workout plans.
  • Energy Balance: Accurate assessment of energy expenditure is crucial for maintaining energy balance, which is essential for weight management and overall health.
  • Research and Epidemiology: This conversion factor is essential in research studies and epidemiological investigations, where energy expenditure is a key variable.


In conclusion, 1 MET is a fundamental unit of measurement that represents the energy cost of a specific activity. By understanding the conversion factor of 1 MET = 1 kcal/kg/hr, we can better appreciate the energy expenditure associated with various activities and make informed decisions in fields such as exercise prescription, energy balance, and research.

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