Hello, 
I have studied your case with diligence.
At age of 56 there can be degenerative wear of muscles and ligament and loss of elasticity of muscles, due to deficiency of VIT B12 and carnitine these symptoms can be aggravated .so supplements of these nutrients can relieve pain.
Another associated factor can be due to 
osteoporosis of  spine bones there can be diffuse pain all over body,which is common in RA.
Check your bone strength with 
DEXA SCAN and you can start medication according to level of osteoporosis,
I will advise you to do regular 
physiotherapy and exercises as my patients find much relief by these therapies.
You need to take diet rich in calcium and vitamin D.
Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries. 
Wishing you good health.
Take care