Can I Start Contracting Stomach Muscles 5 Days Post-Op Tummy Tuck with Lipo?

Seriously, how can any of us respond since we are not your treating surgeon. Give the surgeon a call to check if this is acceptable in his post operative protocol. In mine, it is not, I tell, write my detailed instructions to all my patients. No muscle use for atleaast 10 days. 

It is fine to be up and moving around the house and increasing your activities to the limit of your comfort, but it is way too early to do any specific exercises or muscle contractions of the abdominal muscles. I prefer to have my patients avoid specific core exercises for 8 weeks postop.