- Gluteus maximus: Hip extension
- Quadriceps (rectus femoris, vastus lateralis, vastus medialis, vastus intermedius): Knee extension
- Hamstrings (semitendinosus, semimembranosus, biceps femoris): Knee flexion, hip extension
- Calf muscles (gastrocnemius, soleus): Ankle plantarflexion
Secondary muscles:
- Lats & lower abdominals
- Pecs, triceps & upper abdominals
- Core musculature, especially the oblique
- Upper thoracic stabilizers (rhomboids)
Synergist muscles:
- Tibialis anterior: dorsiflexion (lifting up front part of foot).
- Tibialis posterior: inversion (turning inward), plantar flexion.
- Fibularis longus & brevis: eversion (turning outward), plantar flexion.
Antagonist muscles:
- Hip flexors
- Knee flexors
- Ankle dorsiflexors