Understanding Heavy And Painful Legs: Causes and Meaning If this question comes to your mind “Why are my legs aching and feeling so heavy?”, you are certainly not the only one. Across India, a large number of people, particularly those who sit for extended periods, deal with this issue regularly. https://www.tumblr.com/maheshnadgir/811852445099671552/what-does-it-mean-when-legs-feel-heavy-and