The pectorals are the largest chest muscles, and they tend to be tight on almost everyone, especially if you spend long hours at a computer. This stretch can give you relief from upper back & neck pain, which are often sore due to the opposing pull of the pecs. Simply position yourself in an open doorway, with your elbows bent to 90′ and at shoulder height, so that your forearms are resting along the frame with hands pointed toward the ceiling. You can choose to stretch both sides at once, or relax one arm at a time . Step ahead and lean through the door, keeping your arms in place, until you feel a comfortable stretch across the chest. Hold the stretch for at least 30 seconds or until a release is felt.
To enhance the stretch by targeting the slightly different fibre directions of the large pectoral muscles, repeat the stretch with your hands 1) lower, just above shoulder height on the door frame and 2) above your head on the door frame, high enough that your elbows are only slightly bent.