I had a shunt replacement surgery in place for only about a month, I'm 56 years old by the way. I decided I could expedite my healing by getting back to the gym. Mind you I lift weights, nothing too heavy but still. I started slowly of course and felt great. I decided to up my bench press just to 100 Lbs. Still not too much but enough as to it popped the shunt loose in my abdomen. I actually felt a pop inside my stomach and knew something had happened. It didn't hurt and believe it or not I forgot about it. A few weeks later a growth started occurring right at my rib line. Long story short, it continued growing. I had to go back and have the shunt repositioned. No fun but I learned a lesson. Take it slowly if you are lifting at least. I'm now watching my diet more and walking at least for the next few months. Good Luck.