This article is from the Ergonomics and Typing Injury FAQ, by Dan Wallach firstname.lastname@example.org with numerous contributions by others.
A. The neutral position described in #7 can not be achieved while in
contact with most commercial wrist pads. For this reason keyboarding is
best performed from a "floating" wrist position. Contact wristpads for
rest periods only. Frequent rest becomes necessary with floating wrists
because it tends to emphasize shoulder muscle contraction. Don't forget to
use the lightest possible finger pressure during keying.