This simple yet powerful 10-20 minute breath test determines how much energy (calories) you burn in a day at rest. You simply sit back, relax and breathe. During the test, the air you breathe in and out is analyzed for how much oxygen your body uses to maintain basic life functions. Once completed, you use your RMR calories to provide a foundation for your calories burned during a day. You then add how many calories you burn during activities of daily living (ADLs) and exercise calories to get a total calorie expenditure for the day.
To perform this test most accurately, it is necessary to follow the simple pre-test instructions found here.