Down Stretch

Erector Spinae, Semispinalis, Deep Posterior Spinal Group

• Extend the upper back as the carriage closes.

  
  

  

Rectus Abdominis, External Oblique, Internal Oblique, Transversus Abdominis, Erector Spinae, Semispinalis, Deep Posterior Spinal Group

• Provide lumbo-pelvic stabilization.

• Keep the entire spine supported in a plank position as the carriage moves away.

• Assists the spinal extensors as the carriage pulls closed while keeping the spine supported to protect the lower back.

• Resist gravity and spring load as the carriage moves out and in.

  
  

  

  

  

Anterior Deltoid, Pectoralis Major, Coracobrachialis, Biceps Brachii

• Push the carriage out.

  
  

  

Latissimus Dorsi, Teres Major, Posterior Deltoid

• Pulls the carriage closed.

• Works with the spinal extensors to roll the shoulders back and support the upper body weight as the upper back extends.

  
  

  

Lower Trapezius, Serratus Anterior, Latissimus Dorsi, Pectoralis Minor

• Keep the shoulders down away from the ears.

• Works with the shoulder extensors to provide stabilization as the carriage closes.

• Works with the upward rotators to provide stabilization as the carriages presses out.

  
  

  

  

Serratus Anterior, Trapezius

• Swing the bottom tips of the scapulae away from each other to allow for the arms to reach up by the ears as the carriage is pressed out.

  
  

  

• Assist with the spinal extensors and the shoulder extensors to pull the carriage closed by swing the bottom tips of the scapulae together.

  
  

  

• Hip extensors co-contract with the spinal stabilizers to assist with stabilization of the pelvis.

• Scapular abductors (protraction) assist with the shoulder flexors and scapular upward rotators to separate the scapula as the carriage moves out.

• Scapular adductors (retraction) assist with the spinal extensors and the shoulder extensors to pull the carriage closed by drawing the scapulae together.

• Elbow extensors keep the elbows straight.