Does keeping the knee straight increase medial gastrocnemius activation during plantar flexion?

We analyzed the available research and found that 20 studies support, 0 studies refute this pattern. When you point your toes while keeping your knee straight, your inner calf muscle works much harder than the muscles around your shin and ankle ¹. This happens because straightening your knee naturally changes how your body activates different leg muscles during exercises. What we've found so far points to a clear trend, but we want to be honest that this is a partial view. Our current analysis shows a consistent pattern, yet we know our understanding will improve as more data becomes available. We do not treat this as a final answer. Instead, we track how the information shifts over time.

If you want to target your inner calf during toe-pointing movements, keeping your knee straight may help you get more work out of that muscle. You can try this by standing tall, pointing your toes, and making sure your knee stays fully extended. Pay attention to how that muscle feels during the movement. We will keep monitoring new studies to update our findings as they come in.