I'm a 26 year old male and I have been fitnessing for almost a year now with the purpose of gaining weight.
I was born with malformation in my right foot (the bones were all in wrong positions) and a short agilis tendon. After almost 20 times surgery my foot is now good but very immobile, they attached my metatarsals to each other and a blocked ankle, I can move it up and down a little bit but not sideways.
Over the years this left me with a big difference in muscle mass between my two legs. My right calf is 1/3 of my left one, my left leg did almost all the work my entire life. So my right calf is very underdeveloped. Because of the underdevelopment it is nearly impossible to do one foot calf raises.
How can I train ONLY my right calf to lessen the difference knowing the above?