I went to my doctor for stiffness of my muscles in the arm and legs back in March 2017. I told my doctor that I think it's due to arthritis. He said NO to my suspicion. So, about three weeks ago I asked Cortana the cause of my ailment. She referred me to an article in Wikipedia which said that I have hyperlipidemia or high cholesterol. So, the article recommended that this condition can be remedied by reducing weight and a lifestyle change.
So, started eating tortillas, fruits, vegetables and cut red meats from my diet. As of today, I've lost about 5 pounds so far. And I noticed that I can walk better without limping. I'm hoping that my muscles will be more supple as before in the next few more weeks. Thank you for your help, Dr. Cortana.