My arms are hurting very bad and my shoulders are out of joint. I...

Take 300 mg coQ10 per day. Some people go as high as 1000mg per day. This may offer improvement. Bobby

Bobby is so right but make sure it is Quinogel or Q-gel. They are made from kaneka and tishcon. Many worldwide studies including a cardiologist show that these products are 300 - 500% more bio available than their competitiors.
I also found magnessium citrate powder aided my sore muscles by 10% approx and as you know every little helps. Best for your health from New Zealand.