Well just for reference, currently i am at the level of approx 40kg weighted single calf raises, 25 reps per set. (I can weight single side of the resistance bands with the luggage scale so times 2)
My weight is 64kg now .
Might be a bit overkill, but i like...... anyway i do in office server room and sometimes microdose so no issue in terms of time needed.
Other than the pogo hops (left right front rear) as plyometrics.
Remember to hit the soleus (knees bend a bit).
Also to prevent imbalances, hit the anterior tibialis as well.
Also, i have started single leg rope skipping as well but just for fun and balance/stability control........this one more for old age into 60s/70s as well.