Lower back, left side, soft tissue injury
this particular spot has been injured a few times before. I have clear memory of this happening while deadlifting in 2014 and turned me off of power lifting. And another time in 2016 when I went to lift a 45 plate to get it off the ground. I think each of these were small spasms.
this spot has been various levels of sore throughout the last year of training. especially when digging out the back patio. sometimes when lifting heavy in the deadlift -> I think this was when rounding my back -> this concern triggered buying a belt, but I dont think that has helped
On oct 2, I changed out the felt for rubber underlayment on the sauna. My back was really sore the day os this work