How long before muscle repair is "secure" after a tummy tuck? 1 week post op.

Good question.  In general, her body should have made enough of its own natural biologic glue and scar tissue at about two months.  At that point, even if the stitches were to rupture or break, the scar that is formed should hold the muscle repair together, in my opinion. Best of luck!
Dr. SubbioBoard-Certified Plastic SurgeonNewtown Square/Philadelphia, PA

I would say 2 months is the time frame to be very careful. I have seen a few popped sutures over the last 14 years but it is very rare. Your doctor can examine you if it has occurred.  I have not seen them pop due to post operative vomiting, I hope this helps,Good Luck

The stitches of the Muscle repair will remain strong enough to endure all type of muscle efforts for 3 months if it was done using absorbable stitches. After that time scar tissue will take place as strong as the stitches themselves.For that reason I use non-absorbable stiches. Scar tissue only will close even stronger.Eventhough you feel coughing or vomiting may tear up the MR, it will be almost impossible.Be confidentDr. Cardenas

I my practice patients may begin walking for exercise after two weeks; more strenuous cardio after one month; then after three months they may begin to work the abdominals gradually and low reps.
Theoretically complete healing takes six months to one year.
It would be unusual (though not impossible) to rip the muscle repair by coughing or vomiting.
I hope this helps.

It usually takes six months for abdominal repair to be secure and healed. Till then aggressive workout or abdominal strain can have a negative impact on result from surgery. 

It can take a goof 6-8 weeks for the muscle repair to be stable. It may take a it longer. I tell my patients to avoid sit-ups and the like for about 8 or so weeks.  But everyone heals a bit differently . Best to review with your doc.

Congratulations on having undergone the tummy tuck procedure. It will be several months before the muscle plication will be considered "secure".
In general, it would take a significant amount of pressure to “undo" the muscle repair after tummy tuck surgery. This event would likely be associated with significant discomfort. A change in your physical examination, such as increased swelling, bleeding, a new onset "bulge" would also be likely.
 In other words, generally speaking, abdominal wall muscle plication performed during tummy tuck surgery is quite secure; disruption is very unusual.
My best advice: return to your preoperative activity level in a very gradual/careful fashion, under the guidance of your plastic surgeon.  In the longer term, you should be able to return to full activity ( without concern for disruption of the abdominal wall plication), including workouts etc.
Best wishes for an outcome you will be very pleased with long-term.

1 week is too early to consider your muscle repair totally healed.  The first stage of wound healing is approximately 6 weeks but I would not stress the muscles with heavy lifting for 3 months after muscle repair.  Of course discuss this in detail with your plastic surgeon..