there are already several approaches to considering those subsystems. One of them is the ViPR training created by Michol Dalcourt http://www.viprfit.com/IntroducingViPR/TeamViPR/MicholDalcourt.aspx. Another is the functional training approach from Gary Gray https://www.grayinstitute.com/. Chuck Wolf has been presenting on those procinples as well for years https://www.3dhumanmotion.com/.
All of them have also some YouTube presence.
Hope that gives some sources for further investigation.