These activity factors were determined by research published in 1919 by Harris and Benedict, so they are a bit rusty but to date there is nothing better. You might have had questions about what “Activity Level” to set, you are not alone. The problem is that these activity factors are very fuzzy and difficult to apply because they were based upon research back in 1919 and back then they didnt really do the kinds of exercise we do today. Here is a chart that shows my interpretation of the activity levels and an alternative description to help you choose the proper level:
When we first designed Metabolic Cooking, we had a wide variety of people in mind. We thought about those who were struggling with diets but couldn't stick with them because they were bored to tears with the bland foods they were currently sentenced to on that approach, we thought about those who had an ultra slow metabolism from years and years of very low calorie dieting that really starved their body for nourishment, and we thought about those people who wanted to lose weight so badly but just couldn't give up the pleasure they had in the process of eating. They wanted high-taste and weren't willing to give it up. Oh, and we also thought about high level athletes as well. Even though most of these people are already in good shape, we know that many of them want to take things to the next level and really enhance their physique.