I searched the history of posts and did not see this topic mentioned. I am seeking information (research, articles, etc) about the impact of very long fingernails, natural or artificial, and how this affects posture and force while repetitively keying or typing. What would be an appropriate nail length for a person using a computer? Have you seen or use a nail length policy in the workplace? If so, can I have a copy of it? So far, this seems to be a challenging issue to address.
Emil Pascarelli discussed this issue in his 1994 book titled “Repetitive Strain Injury: A computer users guide”. In here he states that long nails force the user to type with the fingers in an extended position. This results in co-contraction of the extensor muscles (holding the finger straight) and the flexor muscles (trying to make the finger hit the keys). The extensors are thus held in a static contraction while the flexors must work extra hard to over come the tense extensors.
It is very difficult to type with the fingers in a relaxed curled position if you have long nails. A hard nail does not give the same control or tactile feedback that one gets from the flesh of the finger tip.