Hand screeding to level out concrete creates a lot of stress on the wrist, hands and back. Try screeding with one foot in front of the other to reduce bank bending and excessive reaching.
Concrete workers should should use proper work precautions against contact dermatitis and skin sensitization. For additional information refer to either to the ELCOSH library or the Laborers Health and Safety Fund's reference material on working safely with cement.
Cement, Overexertion, Posture, Cement Mason, Laborer, Commercial & Institutional, Heavy & Highway, Industrial, Images
Cement Masons/Washington State Department of Labor and Industries