any transporting or supporting of a load, by one or more workers, including lifting, putting down, pushing, pulling, carrying or moving of a load, which, by reason of its characteristics or of unfavourable ergonomic conditions, involves a risk particularly of back injury to workers, raskuste inimjõul ümberpaigutamine, mis sisaldab tõstmist, uude kohta asetamist, kandmist, käru või vankriga vedamist, veeretamist jms.
