Hello Folks. I new to the site though I’ve been using “supple leopard” for a few months. I’ve been doing crossfit since the end of January this year. I’ve a problem I could use some help with concerning my lower back on the left side. I trained for a few days during the week nothing too stressful on Saturday it was raining I was running from the shop to my car when I felt something explode on my left lower back I kept running it was only a few meters but since then I’ve been completely incapacitated. I’ve used techniques in the book and the site to improve pain and range of motion but it’s still very sore. I’ve noticed also that my glutes are stuck on and very tense which is pulling my feet into an open position. I am extremely tight on the left side going up into my shoulder blade and neck. Any help and advice/diagnosis would be great and thank you in advance