Grade: 3
Started at the end of skipping rope (stopped at once).
Got it back while orienteering 21 dec, no warning signal, it felt like a small rubber band snapped in the calf, pain grow slowly, had to walk home. I guess there will be alternative training for a month now.
Do not run on toes too much. Use better shoes. Make sure to insert a rest day before run, if had calf injury less than a month ago.