Each joint action, with the role and emphasis the graph assigns each muscle. These are qualitative anatomical labels, not measured muscle activation.
Shoulder flexionprimary action
Anterior deltoid (prime mover, high emphasis); Medial deltoid (synergist, moderate emphasis); Pectoralis major (synergist, low emphasis); Supraspinatus (synergist, low emphasis)
Elbow extensionsecondary action
Triceps brachii (prime mover, high emphasis)
Hip extensionsecondary action
Gluteus maximus (synergist, moderate emphasis); Biceps femoris long head (synergist, low emphasis); Adductor magnus (synergist, low emphasis)
Knee extensionsecondary action
Vastus lateralis (synergist, moderate emphasis); Vastus medialis (synergist, moderate emphasis); Vastus intermedius (synergist, moderate emphasis); Rectus femoris (synergist, low emphasis)
Scapula upward rotationsecondary action
Serratus anterior (prime mover, moderate emphasis); Trapezius (synergist, low emphasis); Trapezius (synergist, low emphasis)
Spine extensionsecondary action
Erector spinae (stabilizer, high emphasis); Rectus abdominis (stabilizer, high emphasis); Transverse abdominis (stabilizer, high emphasis)