I had 2 workouts this week: Spinning & strength/cardio circuits. I've found these are the best things to do with my SI joint/sciatica. I'm changing up with the circuits though so I'm not literally doing the same exact thing every time. I'll switch up both the exercises I do (I use TRX, dumbbells, and do body weight exercises) as well as changing up the format/time I do each exercise for (for example: one day I did a tabata style workout and the next day I did as many rounds as possible for 2 minutes).
Monday: 30 min strength/cardio circuit @ home + 30 min Spinning @ Y (on my own)
Tuesday: 45 min strength/cardio circuit @ home
Wednesday: 30 min Spinning @ Y (on my own)
Thursday: taught 1 hr Spin/TRX
Friday: 45 min Spinning @ Y (on my own)
Saturday: 40 min strength/cardio circuit @ home