Hi, thanks for writing to HCM.
Based on the description, I dont think you have any serious issues and the swollen legs and feeling of sore muscles could be "Physiological".
Generally, development of swellings in legs after prolonged immobile periods is called dependent oedema which usually develops due to inactivity of the calf muscles in pumping the venous blood
back to heart.
The only way to prevent this is by moving all the joints in the lower limb atleast once in a hour and make the muscles to work.
Hope this helps