10. Impingement vs.
non-impingement
• Reduced scapular upward rotation in first phase
(60° elevation).
• Increased anterior tilt.
• Diminished activity in serratus anterior.
• Increased activity in upper trapezius in last phase of
elevation.
• Increased activity in lower trapezius in the phase 60-120°
of elevation
Ludewig,P.M & Cook,T.M., 2000
11. Manuel
muscletesting
Lear LJ, Gross MT. An electromyographical analysis of the scapular
stabilizing synergists during a push-up progression. JOSPT 1998
3:146-157
Serratus anterior
Maximal
Voluntary
Isometric
Contraction