I made it to the gym again!

3 months into my humira treatments and Im back in the gym for the first time in years! I honestly thought this day would never come!

Im only doing about 5% strength on lower back exercise (back extensions and external rotations) for now but im doing about 70% on mid and upper back and 100% on everything else (chest, abs, arms, legs).

Any thoughts on the lower back exercises? Logic i think says i shud slowly build up on them but im also terrified to flare up my AS by doing so as its still very tender only on lower back stuff.