The problem with comparing a biomechanical system (joits, Etc.) to a mechanical system is that the biomechanical system repairs itself.
An engine cycle is an engine cycle, every one adds wear and the engine, regardless of preventative maintenance, will only go for so many before things wear out.
If the repair mechanisms are not overloaded (over training), a biomechanical system will undergo compensation and not only repair the damage, but be stronger following the repair. Unlike a purely mechanical system, the biomechanical system will weaken itself intentionally if not used to be more efficient.
An engine cycle is an engine cycle, every one adds wear and the engine, regardless of preventative maintenance, will only go for so many before things wear out.
If the repair mechanisms are not overloaded (over training), a biomechanical system will undergo compensation and not only repair the damage, but be stronger following the repair. Unlike a purely mechanical system, the biomechanical system will weaken itself intentionally if not used to be more efficient.