Notes on proper distance from the keyboard:

• Try to find a position where the elbows are only slightly in front of the mid-line of the torso.
• Don't sit too far back on the bench and slouch. Instead sit towards the front half of the bench and activate your core sitting up straight.
• Don't sit too close to the keyboard either! If your elbows are behind the mid-line of your torso, you will feel cramped and it becomes difficult to use the upper arm effectively.