Flexibility and back arch after abdominoplasty

The flexibility will return over a period of months to years.  The tightness is the result of reconstructing the muscular corset. It is much too early to be doing stretches. 

4 weeks is still early in the recovery
to make any final determinations. I recommend waiting 6 weeks until starting
your usual exercise routine including abdominal exercises. Having said that,
after a few months, you should have full flexibility and improved core strength
since your diastasis is repaired. Stick with your plastic surgeon's
recommendations regarding your recovery and return to activity. Congratulations
on your successful procedure!

It for weeks there is still a lot of swelling in this rigidity in the abdominal wall. This will improve with time and you should have full extensibility within the next few months.

You are only 4 weeks out from a tummy tuck with muscle repair.  These are common problems that are encountered with every tummy tuck that is done to acquire the best result possible.  It may take several months for your abdominal muscles to feel normal after the muscle plication, but I find that many patients actually believe their posture is better with less back pain after the surgery.  Take care and good luck.

Thank you for your question.  "4 inch gap" is a large area that has been repaired and it will take your body and muscles time to adjust to the new core strength that you have.  Keep in mind that you didn't have a core strength until your board certified plastic surgeon repaired your "gap".  You are still early and will take some time for your flexibility to return but once it does, you will have a strong core and will be feeling much better.  Please follow up with your plastic surgeon for detailed recommendations on activity.  Best of luck. 

A four inch gap is rather large, and having flexibility issues is not too surprising.  Your surgeon should recommend some stretching exercises, or perhaps better a referral for physical therapy. Best wishes.