I was playing cricket. While bowling, as I landed after the jump, I felt a strong jerk in my lower back. I was not able to stand straight after that and had to sit down. It happened in evening, I took rest for whole night. lying straight on the bed with minimal movement. Its a little better now in morning but back is still very stiff. When it happened, I could not stand straight or walk. I could bend forward. now, after a night's rest, I am able to stand straight and walk, but its still very stiff and it pains while getting up, sitting or bending forward.