Spiderman push-up. Type: Compound. Target: Lower Pectoralis Major. Synergists: Upper Pectoralis Major, Anterior Deltoid, Triceps Brachii, Iliopsoas, Tensor Fasciae Latae, Rectus Femoris, Gluteus Maximus, Gluteus Medius, Gluteus Minimus. Dynamic stabilizer: Short head of Biceps Brachii. Important stabilizers of supporting leg and core: Iliopsoas, Tensor Fasciae Latae, Sartorius, Quadriceps, Internal and External Obliques.