Standing Calf Raises

The standing calf raise is the primary gastrocnemius-biased calf exercise. Performed with the knee extended, the gastrocnemius — which crosses both the knee and ankle joints — is at its optimal mechanical length for force production. Riemann 2011 confirms gastrocnemius medial dominance (46% MVIC) with the soleus as secondary contributor at the same level as the lateral head (35% each).

Execution

1. Position the shoulders under the machine pads; stand with the balls of the feet on the edge of the platform, heels hanging off
2. Keep the knees straight but not hyperextended throughout
3. Lower the heels below platform level to achieve full ankle dorsiflexion (calf stretch)
4. Raise the heels as high as possible into full plantarflexion; hold at the top for a count
5. Lower under full control — do not let the heels bounce at the bottom

What the EMG Data Shows

Riemann 2011 (standing, knee extended):

Muscle	Activation
Gastrocnemius medial	46% MVIC
Gastrocnemius lateral	35% MVIC
Soleus	35% MVIC

The medial gastrocnemius dominates, consistent with its larger cross-sectional area.

Why the Knee Must Be Extended

The gastrocnemius originates above the knee (femoral condyles). When the knee is bent, the gastrocnemius is slackened at its proximal end, reducing its mechanical advantage. Standing calf raises with the knee straight maximize gastrocnemius length and contribution. The seated calf raise (knee ~90°) dramatically reduces gastrocnemius contribution and isolates the soleus instead.

Foot Position

Foot position	Effect
Toes forward	Balanced medial/lateral
Toes out (external rotation)	Slightly greater medial head emphasis
Toes in (internal rotation)	Slightly greater lateral head emphasis

For system-specific training applications, see each system's lens entry.