• Peter

    This is a nice gadget! Question: For caloric needs, the weight usually needs to be adjusted in order to distinguish between lean and fat tissue, since lean muscles need more calories per day. Is a specific body fat percentage assumed in the calculator?

    • LukeHansons

      Peter, caloric expenditure is usually collected via gas exchange. This accounts for all things that are metabolically active.

      • Peter

        Thanks for the answer! Isn’t lean muscle mass metabolically more active than fat tissue? I thought that the calulator has to assume something about body consumption given that it does not measure gas exchange.

        • LukeHansons

          Yes it is. However, gas analysis is representing all metabolically active tissue. Based on your thought, we would then have to account for bone, tendon, and smooth muscle. How many calories does your brain and central nervous system use? The breakdown can go on and on.

          The calculator does assume some things because it is a guide. Again, you have to trust me that I put some thought into these things. As do researchers who have collected gas analysis data for decades. Calculators have to assume certain things that have been shown to be pretty darn consistant across genders, ages, fitness levels, etc. The only way you would get an exact indidual answer is to have tests done on yourself.

          • Peter

            Thanks for the answers (and setting up the calculator in the first place). I understand now what you mean.

  • LukeHansons

    An athlete of ours inquired about a good place to log dietary intake and see if what they were eating was appropriate. Here’s a good place to start for endurance athletes: http://data.gssiweb.com/data It’s a 24 hour recall which makes it much less demanding than the traditional 3 day diaries. This is a good tool to get a quick glance at how your diet stacks up to what your training requires.