Patients with cool hands heal more slowly, which may indicate poor circulation. I wear elbow length, fingerless, wool gloves to keep my wrists toasty warm. A poorly designed workstation can cause injury. Poor design, however is not the only culprit - repetitive work itself is hazardous. Without redesigning your work and health habits, you remain at risk.
Some manufacturers promote ergonomic products that are useless or even dangerous.
Consult the books listed in the reference section, a local ergonomics expert, or a qualified physician, when buying furniture for your workstation. The human body is nonlinear and comes in many shapes and sizes. Computer interfaces which lack adjustments and do not account for the body's natural curves are therefore inherently suspect. A wide variety of new designs address these problems through splitting the keyboard in the middle, wrist pads, and numerous adjustments for proper height and position. Mice, trackballs, tablets, touchpads, and other pointing devices pose their own special problems.