Does slow-speed calf training increase maximal voluntary contraction force?

This single assertion is the only piece of evidence we’ve reviewed so far, and it supports the idea that slow-speed training could lead to greater force production in the calf muscles. There are no studies in our current review that contradict this finding. However, the sample size was very small—only six people—and the study did not include older adults, athletes, or individuals with different fitness levels. We also don’t have data on how long these changes lasted or whether similar results appear with different training protocols.

What we’ve found so far leans toward the possibility that slow-speed calf training can improve maximal force output, but we cannot say this applies broadly. The evidence is limited to one small group under specific conditions. More research with larger, more diverse groups and longer follow-up periods would help clarify whether this pattern holds across different populations.

For now, if you’re looking to strengthen your calves through controlled, slow movements—like rising onto your toes over a count of three or four seconds—this small study suggests it might help you push harder when standing on your toes. But results may vary depending on your age, fitness level, and training history.