Single-Leg Calf Raise

Move · Resistance Training · Movement, Typed Supps

Even carrying your whole bodyweight on one calf is less than the load that same calf handles on a single running stride.

Stage by stage

Set-up (Knee extended, heel free): A straight knee keeps the gastrocnemius long across both joints; a step lets the heel drop below the forefoot.
During the set (Load per leg doubles): One limb carries the whole bodyweight, so rep counts must fall sharply rather than simply feeling harder.
At the bottom (Long-length loading): The dropped-heel position loads the complex where strength deficits show and where the tendon takes its strain stimulus.
Months later (Still submaximal for running): Achilles forces in running exceed bodyweight several times over, so external load is usually needed once this becomes easy.

Muscles trained

Primary: calves, soleus
Secondary: shins

Intensity

3.5 METs (Resistance (weight) training, multiple exercises, 8-15 repetitions at varied resistance).

Time to effect

Weeks: Balance on the working leg usually improves within the first few sessions, often before strength does.
Months: Any side-to-side calf strength gap that was hidden by the two-legged version tends to close with consistent single-leg work.

Common myth

"If you can do plenty of two-legged calf raises, the single-leg version should feel about the same, just harder." In reality: The jump in per-leg load is large enough that most people need to drop reps significantly rather than simply expecting a harder version of the same set.