I would encourage the use of the term "ergonomic risks or manual handling risks" as this covers everything. Strains and sprains are quite localised and defining.  As there are many other ergonomic problems that can arise from manual handling, this leaves a whole swathe of risks unaccounted for.

Manual handling/ergonomics should be there as an all encompassing term unless the person writing out the risk assessment wants to list every ergonomic risk separately.

Ah, yes. Familiar territory indeed. Sprains and strains are not hazards, but injuries. In the broadest sense, the task/activity of Manual Handling is the hazard.

stonecold, I still use a five-step process when considering and writing up a risk assessment, which separates the hazard and the possible injuries.

So typically for machine work I might include for the manual handling hazard:

Step 1 - What are the hazards & how might they cause harm?

Manual handling of workpiece

• pieces may be heavy and above capabilities of operator
• sharp edges
• impact/collision while carrying

Step 2 -  Who might be harmed & nature of injury?

• Operator. Strain in hands, arms, shoulders, back, through over-exertion and/or poor posture. Bruising, laceration. Foot injury from dropping parts​​​​​​​