I am 82 years old and female. I have been diagnosed with an anthritic spine. My legs twitch when I lie in bed at night. I have difficulty in walking. I can only climb stairs very slowly and my legs feel very heavy. The heavy feeling gets progressively worse through the day.
Heavy leg feelings can be a symptom of MANY things. Do you have any muscle atrophy or visible muscle twitching that doesn't go away? If you have concerns, bring it to the attention of your doctors.