I lifted a very heavy object today and I heard a loud pop and then draining of strength and went to my knees, all fours. Was taken to hospital on a stretcher as the pain was intense. Hospital x-rayed back with a scan. They saw no injury. Discharge me with three medications and a sheet with the advice with ice and heat. How long will this take to recover.? It hurts like the dickens. My diagnosis from the hospital with muscle spasm. I never had a muscle spasm like this.