The Autistic Yogi Reflects on the S.a.i.d principle...

S.a.i.d. principle
 Specific adaptation to imposed demand.
 When giving the body specific stressors its inherit behavior is going to be to adapt. The more often that the same stressor is imposed on the body than the more likely the body will adapt to it. This can be both a good thing and a bad thing.
  Adaptation in of itself does not necessarily mean better over all but implies something more specific.
  If I adapt to a sitting posture for 50% or more of my waking hours then my other activities may very well suffer as I adapt to being a sitting entity.
  I would figure that the more time that we spend doing something over a long period of time than the greater the adaptation our neural and musculoskeletal system will adapt to accommodate or strengthen the activity (yes I am saying the act of sitting is an activity). It would make sense for the hip flexors to become shorter so that the position can be maintained longer.
 To try and undo the results of 8 hours of activity in 1 hour (even if working harder in that 1 hour then in the 8) the biology of our being is going to favor the 8 hour activity for adaptation rather than the 1 hour.  This is one of the reasons that I feel that yoga doesn't just constitute what I do when I go to the studio and onto the mat and say move this foot here and this hand there, bend here and do this and that, but its about what I do throughout the whole of my day:

•   How do I choose to stand in lineups or at a counter? 
• Do I favor leaning to one leg and jutting my hip out? 
• Do I lean predominantly onto one side of my body?
• When I find myself standing straight do I chronicaly turn one leg out to the side further than the other?
• Do I have an easier time looking left or right?
• How do I lift objects that are on the floor?
• Do I attempt to be conscious of my thoughts?
• How am I breathing?
• Can I scan my whole body for sensations? or am I fairly numb to the sensations going on within my body?

Take a few moments to consider what demand your imposing on your body. Working harder in a shorter range of time will not make up for less effort over a greater amount of time. Explore balance. Try new things out. Find your edge and see if over time you can push the edge further away. Above all make sure that in all of this that you find fun!

Metta