Bad Back occupational hazard

Now and again my back will give way and last Saturday this did happen , this may be due to a bad lift or over working the lifting part of my job .
this time it was small 7ft pool table not a large full size that did the damage , and yes i was wearing a spinal back support with adjustable straps which supports my back

So to some job’s that require lifting heavy slates i am going to turn some work bookings away
I have a few days rest or work that involves no lifting so I can rest my back while still working .
Hopefully the two big jobs of full size tables relocations coming up in the next two weeks are not affected .