Standing calf raise muscles worked

Every role here is for this technique: standing, knees straight, the balls of the feet on a step, heels lowered below the step and raised as high as they go.

What muscles does the standing calf raise work?

The prime movers of the standing calf raise are gastrocnemius and soleus. They produce ankle plantarflexion. The one synergist is fibularis longus. Three stabilizers hold joints and segments still: the quadriceps, the erector spinae and tibialis anterior. The roles follow Neumann (2017) and Kendall et al. (2005).

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Joint actions and their prime movers

The joint actions of the standing calf raise and the prime movers that produce each
Joint action	Prime movers
Ankle plantarflexion	Gastrocnemius and soleus

Every muscle by role

A prime mover produces the lift’s main joint action against the load; a synergist assists that action, or adds a secondary action the lift needs; a stabilizer contracts mostly isometrically to hold a joint or a segment still. A role describes what the muscle does in the technique above, not how hard it works or how much it grows.

Prime movers 2

Prime movers in the standing calf raise, with what each does
Muscle	What it does here
Gastrocnemius	Ankle plantarflexion with the knee straight
Soleus	Ankle plantarflexion

Synergists 1

Synergists in the standing calf raise, with what each does
Muscle	What it does here
Fibularis longus	Plantarflexion, and holding the foot steady on its outer edge

Stabilizers 3

Stabilizers in the standing calf raise, with what each does
Muscle	What it does here
Quadriceps	Holding the knees straight
Erector spinae	Holding the trunk upright under the load
Tibialis anterior	Steadying the ankle as the heels lower

Lowering and lifting

What the prime movers of the standing calf raise do in each half of a rep
Phase	What the prime movers do
Lowering	Gastrocnemius and soleus lengthen as the heels drop
Rising	They shorten to point the feet

Where these prime movers also work

Gastrocnemius: a prime mover in no other lift here; synergist in the conventional deadlift, walking lunge and lying leg curl.
Soleus: a prime mover in no other lift here; synergist in the back squat, front squat, conventional deadlift, Bulgarian split squat and walking lunge.

Sources

Neumann, Kinesiology of the Musculoskeletal System, 3rd ed. (2017)
Kendall et al., Muscles: Testing and Function, 5th ed. (2005)

The cited studies that measured muscle activity used electromyography, and a larger signal need not mean more force or more growth (Vigotsky et al. (2018), Front Physiol 8:985). The roles draw on those studies for which muscles a lift involves and how two lifts differ, never to rank one muscle against another.

See these muscles in 3D

Visualiser · Biology Muscles Worked by Exercise 3D Explorer Choose a lift and a real body lights its prime movers, synergists and stabilisers, front and back, with the same muscles in 3D. Visualiser · Biology Muscle Origin, Insertion and Action Explorer Paint a muscle’s origin and insertion on real 3D bones, or click a bone to see what attaches to it.