This sequence when compared to the gokui provided by Tatsuo Sensei may not be as clear as we would like in translation.
body - by itself it could be almost anything. It leads this sequence so we as Americans may see something other than what was intended when we see the translations of follow and time. could it be that this particular character must be coupled with adapt and change first but then how does it equate to follow and time. With out the gokui translation we currently use it could have remained a mystery.
follow - what follows what in this instance. do we follow the changes by adapt our responses to them using proper timing. this could be the coupling of follow - adapt - changes in our bodies as appropriate. no where does the idea of strike first seem to appear here so do we assume that the body changes and adapts and then follows up with an appropriate response...
time - time could be the time of day; the time of year; the time of month as it relates to the body in optimal use of its muscles and breathing although these terms are not mentioned by may be implied. time could be related to the other characters so we interpret it as "timing" for proper timing when adapting to changes in our lives and/or with opponents is critical so we follow that line of timing - adapting - changing the body to follow the strings that attach it to the environment or universal connectivity all things have in the Earth.
adapt - adaptation to changes in our bodies or adaptation to changes in our opponents bodies so we may follow training to counter appropriately or is this some other reference to the connection of your training to that of life itself.
changes - these may be in reference to the changes that occur naturally and instinctively in nature or the universe where we need to adapt and follow what it may have to teach us or tell us by its effects on the universe and our place in it. changes may also be those we encounter in a conflict yet I believe we should not limit the teachings as the I-Ching is somewhat vague until you start connecting all the adjoining strings into the "one" so understanding is discovered.
This could be interpreted many ways both literal to our practice or to the way we act in life. We encounter a good deal in life that sometimes causes us to view it from a different perspective while in training we learn to adjust our movements to those we encounter be it an opponent or training partner. This one can lead us down a path that is never ending for it may refer to those characteristics we must master in order for out bodies to perform optimally. This is also a reference to how we condition and maintain health for with out it we would be unable to respond to life or an attack adequately.