Study: NCT02699294

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Manual pressure release
Description: Subjects will be positioned supine on a treatment plinth and will be encouraged to relax as much as possible before pressure is applied. A slow pressure to myofascial latent trigger point will be applied directly over the marked pectoralis minor muscle myofascial latent trigger point site until a moderate but tolerable pain value of 7 out of 10 (0= no pain, 10= severe pain) is reported. Constant pressure will be sustained for 90 seconds if the subjects report that the pain is decreased to a value of 3, the pressure will be increased to restore perceived pain to the value of 7. Then, tissue resistance (barrier) in pectoralis minor muscle will be controlled.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Manual pressure release
Description: Subjects will be positioned supine on a treatment plinth and will be encouraged to relax as much as possible before pressure is applied. A slow pressure to myofascial latent trigger point will be applied directly over the marked pectoralis minor muscle myofascial latent trigger point site until a moderate but tolerable pain value of 7 out of 10 (0= no pain, 10= severe pain) is reported. Constant pressure will be sustained for 90 seconds if the subjects report that the pain is decreased to a value of 3, the pressure will be increased to restore perceived pain to the value of 7. Then, tissue resistance (barrier) in pectoralis minor muscle will be controlled.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Contract-relax PNF stretch
Description: Subjects will be in a sitting position with hands being clasped behind the head. The pectoralis minor muscle will be passively and slowly stretched until a strong but tolerable stretch discomfort intensity level of 4 out of 10 (0= no pain, 10= severe pain) is reported. Passive stretch will be sustained for 10 seconds followed by 6 seconds of maximal voluntary isometric contraction of the pectoralis minor muscle. Then, subjects will be instructed to relax for further 4 seconds. Subjects will maintain newly active stretched position of pectoralis minor muscle for 10 seconds with a strong but tolerable stretch discomfort intensity level of 4 out of 10. The procedure will be repeated four times with 30 seconds of rest between two successive trials.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Z-stretch
Description: Subjects will be positioned supine with knee bent on a treatment plinth, and the legs will be rotated to the opposite direction of the arm to be stretched placing a stabilizing distal tension on the ribs. Then, the subjects will be slowly brought the arm in a circular motion overhead pausing at the points of tightness, maintaining close contact to the treatment table until a strong but tolerable stretch discomfort intensity level of 4 out of 10 (0= no pain, 10= severe pain) is reported. Self-stretch of pectoralis minor muscle, including myofascial latent trigger points will be sustained for 30 seconds. The procedure will be repeated four times with 30 seconds of rest between two successive trials.