Specific method: whether outdoors or indoors, you just need to find two bricks and put them up and down, and then put a toe on the edge of the bricks. Lift the calf muscle up and down with the heel (you must sink when you put it down) for 20 times, then do the other leg for 20 times, and do 3 groups back and forth. The last two toes stand up and do similar exercises together. 3 groups of 20 times!
This method is very expensive to stick to, especially after outdoor sports, you must do it!
I hope my good method can help you shape your perfect figure!