Most persons have heard of ergonomics as applied to the work station. Your monitor should be at eye level and directly in front of you and the material from which you type ought to be at the same level. Reduce reflections on your monitor with a hood made from cardboard. Arrange your keyboard so it is flat or slanting away from you by taping a small box under the front edge. Your arms should be slanting downward from your elbows to the keyboard, just as your knees should be lower than your hips when seated, with your feet flat on the floor.
Proper technique is also vital for strain-free computer work.
The muscles of wrists and fingers are delicate and their use should be reduced. Instead, rely on upper body strength, moving the whole hand to reach the return key or using both hands to do key combinations. Avoid bending your wrists either vertically or horizontally while typing as that puts more strain on them. Hold a mouse as if it were a delicate bird and click gently. The gymnast may be more likely to do warming stretches and take breaks, also good ideas for typists.