As this alert from the MSF shows, even the humble gangway can be hard on the shoulders:
Subject: Unsafe Gangway Leads to Injured Shoulder
During a crew change, the injured party (IP) was taking a petrol can down the gangway
when he tripped off the end due to the fact that the gangway was several inches off the
ground. Instinctively he put out his hand to stop himself but, unfortunately, he landed hard, hurting his shoulder. The IP was taken to the local hospital where he was diagnosed with a dislocated shoulder.
The vessel had been in port all night during which time the vessel had risen on the tide which left the gangway off the quay by several inches. This was checked throughout the night by the watchman, but the gangway was too large and heavy for one man to move on his own so he waited to inform the officer on the watch (OOW) in the morning. This he did, but as they were going out to have a look, the IP was already descending the gangway.
The gangway should have been moved to its lower securing point so that it rested on the quay properly before it was used. The IP should not have descended an unsafe gangway; it should have been lowered before use.
Upper securing point
Lower securing point