It seems to me that food energy is either
1] spent (metabolism, NEAT and exercise)
2] stored in adipose tissues
or 3] undigested.

Roughly speaking, the volunteers were given 1000 kcal above their
metabolic rate. Assuming that the "undigested" part can be neglected, the
text says that some people gain weight more easily than others, and
that excess food energy that is not stored in adipose tissues is spent
in the form of NEAT... That doesn't sound a very deep
result to me, and corresponds to everyone's personal experience
(eating a very caloric meal is usually warming).

Of course, scientific articles go further than our intuition in that they
provide quantitative results, all displayed in a very NEAT fashion.


--Jean-Louis Tu <[log in to unmask]>