I always like re -injuring my back, as it really helps me cut through the academic and medical bullshit.
Its very common for us to over sympathise with  and “forgive” back pain sufferers .
We should not.
Every single bit of “normal”  back pain  is self inflicted. (m not talking about the weird obscure stuff that effects  a teeny proportion of back sufferers). Im talking about our old friend , the non specific back pain stuff that is now costing the NHS loads of money.
Anyway , today  I pulled my back in gymnastics. Obviously i could go on a campaign: one that bans gymnastics, and  stops gymnasts from holding high office. Gymnasts should be rounded up and shot. Certainly banned from schools,
You will find lots of campaigns like this: Ban Crossfit, ban strength training, Olympic weightlifting . If you come across someone  trying to ban something, look at their personal involvement and see if their conclusion is reasonable. Being knocked down by a car, does not justify a ban on cars: iI may justify a lower speed limit, more education for pedestrians etc.
So, I screwed my back doing gymnastics? Well, actually yes and no. Here is the whole story.
1) over the last month, my focus has slipped. I found myself more and more in my slumping place, slumping. I have done no “good core” enhancing exercise. My hip and shoulder flexibility regimes have wobbled.
2) On wednesday I booked  myself quite a tough day: 3 hours driving ( I rarely drive) and 8 hours standing about ( i was an extra in film set)
3) On thursday, apart from one gymnastic training session ( 1 hour) i slopped around the flat. I slumped and hunched.
4) On thursday night, i had a terrible night: I got up late on Friday, and  after skipping breakfast I went to gymnastics. I did my normal 1 hour session 10  to 11), but as warm up and  planned to start my coached session straight after. I had felt my 1st back twinge at 10.50, but continued  after a quick rest.  At 11.10m, my  coached session began and at 11.20 a slightly wrong back flick, brought the pain flashing up. While I could still move. I stopped.
So here was the story. Id stopped all my recommended exercises and began slumping. In short, i wasn’t building up my back balance as Stuart McGill tells us to do, and I was “spending” back capacity like water. That said, I had still got through my basic “back buck spending” sport. and then, at the end of a terrible week, i thought i should push my luck by adding an extra hour.
I’m a pratt and  I deserve every scrap of pain!!