False, Despite being an important issue ,few studies exist cthat compare different restrictions recommendations or studying effect of physical activity on the occurance of complications after surgery.
True,fear of herniation of abdominal organs (mainly bowel) through incisons is the main concern that lead to restriction recommendations.
The rationale is that activity increases the intrabadominal pressure leading to increase force on the incision,which may weaken the incison and causes hernia.
True,studies showed that many unavoidable and physiologic activities have greater effect on intrabdominal pressure than some restricted activities.
Restricting activities may potentially increases risk of forming blood clots in the legs that can be dangerous if it disoldge to the lungs.
In conclusion,many current activity restriction recommendations are lacking evidence,a review of the patients habits and expectations is important when making these recommendations.