staying active

I am committed to making this work. But I am afraid that my knee pain will kick in and make this activity a living Hell. My new relationship with fitness is a month old. If this was a love affair I would be cautious. I wouldn't call it a "real relationship" yet. I would wait until three months to see if it had legs. Will my knees hold up and let me stay with it? Is it a committed relationship, or am I just having a casual fling? There is no choice in the matter. I'm in it for the long haul. …