 The contraction of these adductor/extensor muscles can indirectly depress and downwardly rotate the scapulae; this is only required when they are pulled into elevation and upward rotation by the contraction of muscles that attach to the scapulae.If the weight were being pulled solely by the lats, for example, the scapulae would simply be pulled down by gravity, along for the ride.Muscles that attach to and depress the scapulae include the lower trapezius muscle and the pectoralis minor.