I am not a big fan of stretching in general, as most tense muscles tend to be weak. However, the pectoralis minor muscle is a fairly common exception to the norm. I don't recommend the typical doorway stretch because 1. it pulls the clavicle down and back, compressing the costoclavicular space and thus worsening symptoms for TOS patients, and 2. Because it can make certain TOS patients with CVH pass out due to very high head pressures during the test.