Myofascial trigger points are hyperirritable points located within a taut band of skeletal muscle or fascia, which cause referred pain, local tenderness and autonomic changes when compressed. They are classified as either active myofascial trigger points (ATrPs) or latent myofascial trigger points (LTrPs). ATrPs can be inactivated by different treatment strategies; however, they never fully disappear but rather convert to the latent form. Therefore, the diagnosis and treatment of LTrPs is important. Invasive and noninvasive techniques are available for management of LTrPs. Invasive techniques include trigger point injections and dry needling whereas noninvasive techniques include manual therapy techniques and electrotherapy modalities. Manual therapy techniques for the treatment of myofascial trigger points include joint manipulation, strain/counterstrain, ischemic compression and pressure, massage therapy, myofascial release therapy, muscle energy techniques, point pressure release and transverse friction massage. Additionally, recent studies showed that the myofascial trigger point therapy combined with stretching exercise may be an effective for decreasing the pain level. However, there is insufficient evidence to determine what type stretching exercise is most effective and its immediate effects on muscle length in people with LTrPs. Therefore, the aim of this randomised-controlled trial is to investigate the effect on muscle length, pain perception threshold, and respiratory function after a single intervention of manual pressure release combined with stretching exercise on LTrPs in the pectoralis minor muscle.