I had a blood test that showed my creatine level at 1.7, they were going to put a tube through my back to drain my kidney. Three days later, I had another test before the procedure, it was 1.3. The procedure was delayed and another test sceduled. I am a weight lifter, and the day before the first blood test I benched pressed 4 sets of 10 at 225 lbs. When I found out the test read 1.7, I layed around for 4 days doing nothing. It went down to 1.3. My doctor said it had nothing to do with the lifting ? Any comments?