Employee was pulling a water hose in a man-lift. EE was attempting to wash the number #2 scrubber tank. As EE tried to lift the water hose, EE felt a pain in lower back. Employee went to the doctor on 1-23-17. The doctor released EE to regular duty without restrictions on 1-23-17. EE went to EE's own doctor on 2/3/2017 and was put on restricted duty.