If you are using calf raises to improve the capacity of calf muscles for running based activities then it might be worth considering completing them whilst leaning forwards with your trunk. This, along with keeping the non-working knee at around hip level, creates a "positive" position which allows 1) a greater range of motion move through at the ankle 2) puts your centre of mass forwards as it tends to be when running fast and therefore utilising the calf in a similar way, and 3) the high knee engages the lateral hip muscles of the working leg which has an important job of stabilising the pelvis in the frontal plane when running.
Calf Raise Single Leg- Positive Position
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