Warm-up exercises before work can help reduce muscle injuries. Cut down on carrying. Try to store materials at waist height. Raise your work to waist level, if you can. Pipefitters use pipe stands.
Masons have adjustable scaffolds to keep the work at waist height.
Make sure floors and walkways are clear and dry. Slips and trips are a big cause of back injuries. Take rest breaks. When you are tired, you can get injured more. Use carrying tools with handles to get a good grip on wallboard or other odd-shaped loads.