Yesterday was the first time I have exercised in 2 months. I went to the gym and tried Circuit training with new machines. I was afraid I would not be able to do it because you have to sit at some of the machines and sitting always triggered my back pain. All my attention was taken up learning the new machines and trying to follow the trainer's’ instructions. I forgot about the my fears until the end of session. Minimal discomfort, very tired. Then I became worried my exhaustion might bring on killer hip pain or I would wake up today in crippling pain. Neither happened. No matter how many times I tell myself to stop trying to bully and frighten myself, the worry thoughts keep coming.