muscle confusion routines are where you don't allow yourself to plateau with any given exercise because by the time you master it, you change to something else, and yes, this idea does back the p90x system and also, if you are one to know a whole system of kungfu, its sort of the same thing.
so, one week you would do:
day1- compound lifting routines whole body
day2- run, bagwork, mitt work and combo drills
day 3- qi gong and yoga
day 4- legs and back so in kungfu that stepping routines, stance work, forms
day 5- compound lifting and functional strength development (motions that imitate real work using weights)
day 6- forms and body weight exercises (chair dips, push ups, pull up etc)
day 7- rest
week two - mix it up
week 3 - mix it up
week 4 - rest (not really, but just do forms, qigong and yoga with 2 days for running or other cardio work)
and so on. as time progresses and things get even easier despite your mixing them up, then increase teh levels of difficulty, so obviously weight routines demand more weight added or more reps depending on your goals, other routines can be made more difficult as well and so on.
you need to exercise for at the very least 1 hour to 1.5 hrs daily in a cycle of 3 months, then the next cycle of 3 months you work hard 3x weekly for 1 to 1.5 hrs each time with 2x weekly .5 hours of heavy cardio.
If you can't find that kind of time, that's cool, you up the intensity and shorten the timeline.
Coconuts. Bananas. Mangos. Rice. Beans. Water. It's good.