I've had a very rough month, had to drop out of my masters swim class and stop running. I was diagnosed with spondylolisthesis, a displacement of the lumbar vertebrae, which pinched a couple nerves and caused extreme pain down the left leg. I still have lingering aches, but feeling almost normal again. It's caused by arthritis eating away the bone of the vertebrae and allowing them to slip. I had been running 3-4 miles every other day and swimming 1500-2500 yards alternate days (had not begun biking yet). I'm getting PT once a week a gym and once in a pool. Running is out of the question for the foreseeable future, but what about getting back in the pool? Has anyone had this issue and what do I need to be doing to get back in the water.