People with rheumatoid arthritis (a condition where one’s immune system attacks and destroys their joints) who practiced yoga showed significant improvements in the way their disease affects them.

In only 12 sessions, people practicing yoga had decreased disease activity and improved overall health scores.  Many people with rheumatoid arthritis do not exercise regularly, due to the pain and limited mobility associated with the condition. However, those who do some type of exercise tend to report less pain, and as a result end up being more physically active in the rest of their lives. 

And, with only 12 sessions this could be considered a short-term study.  Practicing yoga for a longer term could have even further improvements in their condition.

In a similar study, people with fibromyalgia (a condition that causes chronic pain and fatigue) experienced a boost in their quality of life after just 8 yoga sessions. 

They had improved quality of life scores (via a survey) and a significant decrease in anxiety levels; anxiety is a key symptom in fibromyalgia.

Both of these studies demonstrate the importance of yoga in 2 health conditions that are extremely prevalent in society today.

Several natural medicines can help with the muscle and joint pain of fibromyalgia, as well as depressed mood that some get as a result of pain. Joint Formula contains nutrients to support the joint tissue and decrease inflammation. Anti-inflammatory Formula is a potent natural anti-inflammatory for stubborn pain. Mood Support, a natural anti-depressant, is indicated for mild to moderate depression. It doesn't have the side effects that prescription antidepressants have.

Reference:

Humeira Badsha, et al. Abstract Number PARE0004; AB0402-HP.  European League Against Rheumatism (EULAR) 2011 Annual Congress, 26 May 2011.