📖 Static demo — read-only snapshot

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Gastrocnemius

Superficial posterior calf muscle with medial and lateral heads. Powerful plantarflexor and secondary knee flexor.

Draft95%

Anatomy

Origin: Medial head: posterior surface of medial femoral condyle; Lateral head: posterior surface of lateral femoral condyle
Insertion: Calcaneus via Achilles tendon
Action: Ankle plantarflexion (primary), knee flexion (secondary)
Innervation: Tibial nerve (S1-S2)
Blood Supply: Sural arteries from popliteal artery

Movements (3)

Movement	Joint	Role	Notes
Ankle Plantarflexion	Talocrural Joint	Primary	—
Knee Flexion	Tibiofemoral Joint	Secondary	—
Knee Extension	Tibiofemoral Joint	Stabilizer	Eccentric role during knee extension

Exercises (54)

Exercise	Role
Heel-Toe Walking / Tandem Gait	Primary
A-Skip Drill	Primary
Heel Raise (Eccentric Emphasis)	Primary
Single-Leg Stance on Unstable Surface	Primary
Calf Raise (Explosive Concentric)	Primary
Hamstring and Calf Strengthening	Primary
Ankle Dorsiflexion/Plantarflexion (Resistance Band)	Primary
Calf Stretch (Wall Stretch)	Primary
Alfredson Protocol — Eccentric Heel Drops	Primary
Heavy Slow Resistance (HSR) for Achilles Tendinopathy	Primary
Heel Raise (Calf Raise)	Primary
Stair Calf Raise	Primary
Jump Squat	Primary
Calf Raise off Stair Edge	Primary
Banded Ankle Dorsiflexion Mobilization	Primary
Jumping Jack	Primary
Burpee	Primary
A-Skip / B-Skip Running Drills	Secondary
Depth Jump (Drop Jump)	Secondary
Single-Leg Balance Exercises (Star Excursion Balance Test)	Secondary
Box Jump (Bilateral)	Secondary
Single-Leg Hop Tests (Return-to-Sport Battery)	Secondary
Seated Calf Raise	Secondary
Walking Lunges with Trunk Rotation	Secondary
Back Squat (Barbell)	Stabilizer
Reverse Lunge	Stabilizer
Romanian Deadlift	Stabilizer
Knee Split Squat Isometric Holds	Stabilizer
Single Leg Squat / Pistol Squat	Stabilizer
Squat	Stabilizer
Bear Crawl	Stabilizer
Chair-Supported Single-Leg Balance	Stabilizer
Tandem Stance Balance	Stabilizer
Eccentric Stair Descent	Stabilizer
Wall Sit Isometric	Stabilizer
Countertop-Supported Squat	Stabilizer
Neuromuscular Exercise (Step-Downs / Single-Leg Balance)	Stabilizer
Wall Ball Squat	Stabilizer
Backpack Weighted Carry	Synergist
Leg Curl	Synergist
Backwards Walking	Synergist
Step-Up on Stairs	Synergist
Heel-to-Toe Walk	Synergist
Power Clean (Hang Variation)	Synergist
Towel Hamstring Curl	Synergist
Knee-to-Wall Ankle Mobilization	lengthening
Legs-Up-the-Wall	lengthening
Wall Hamstring Stretch	lengthening
Leg Extension	lengthening
Supine Hamstring Stretch (Strap-Assisted)	lengthening
Standing Calf Stretch on Step	lengthening
Doorframe Calf Stretch	lengthening
Mindfulness-Integrated Stretching	lengthening
Downward Dog (Adho Mukha Svanasana)	lengthening

Sources

Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation — Anatomy of Gastrocnemius — origin, insertion, action, innervation
Muscles: Testing and Function with Posture and Pain — Manual muscle testing for Gastrocnemius