• Use as much resistance
  that you can maintain full
  control with.
• Hold chest up and out.
• Maintain natural curve in
  lower back.
• Keep shoulder blades
  protracted apart.
• Activate your T.V.A.
• Exhale as you retract your shoulder blades together.
  
• Follow by pulling the
  resistance towards your
  sides at lower rib level.
  
• Inhale as you return.
• Do not return arms too far
  to round your back and
  shoulders.
  

All photos by Eric Jacobson