SOLEuS
Joint Action performed by the Ankle
- Plantar flexion
Origin: 1. Tibia (upper posterior)
- Fibula (upper posterior)
Insertion: Calcaneus – Achilles tendon
Common distortions caused by tightness are elevated heels during a squat due to limited
dorsiflexion and increased stress on calcaneus
POPLITEuS
Joint Action performed by the Tibia
- Flexion
- Internal rotation (when femur is fixed)
Joint Action performed by the Femur
- External rotation (when tibia is fixed)
Origin: Femur – Lateral epicondyle
Insertion: Tibia – posterior medial aspect
Common distortions caused by weakness is a hyperextended knee
Common distortions caused by tightness is an inability to fully
extend knee and an internally rotated tibia
FIBuLARIS (PERONEuS) LONGuS
Joint Action performed by the Foot
- Eversion
- Pronation
Joint Action performed by the Ankle