I've got psoriatic arthritis (PA) that flares up occasionally (about once or twice a week) and pretty much makes squatting impossible those days. I've been taking Enbrel since May and it has allowed me to progress from not being able to walk at all to being able to live a normal life and do things like full body strength training.
I did SS from July 9th until the middle of October (reducing squats to M & F). Right now I am on a 4 day routine (Sunday, Monday, Thursday, Friday) with squats on Sunday & Thursday. Now, my PA does not care what I want to do on Sundays & Thursdays it just flares up when it wants to. Deadlifting on flareup days sucks, but it is doable because my knees do not have to bend as much.
I know a lot of you have trained around injury and some of you have trained around chronic pain (Monstaface) so I come to the only message board whose members I hold in respect for advice.
Edit: I obviously want to keep squatting
I'm thinking I need to go to a "floating" squat schedule - do it the days I can, not the days it is written down. I'd rather not squat & heavy dead on the same day so I was thinking I'd float the heavy deadlift day (which I can usually do no matter how the knees feel) when the squats kick it off schedule.
I could also squat on off days but honestly I'd rather sit on my ass and recover.