• Improved flexibility, which also decreases pain. For example, tight hips strain the knee, so improving flexibility lessens knee pain. 
• Builds strength. I love talking through this during vinyasa – vinyasa is one of the best ways for me to tell I’ve built strength. The flow movement and working against your bodyweight builds incredible strength in your body.
• Improves your posture, which helps with back pain and fatigue.
• Prevent cartilage and joint breakdown, and improves bone health by moving joints through full range of motion and lifting your own weight – this is a great talking point for our clients with arthritis or osteoporosis! 
• Increases blood flow, which helps with any inflammation and even reduces your risk of heart attacks or stroke!
• One of my favorites: boosts immunity! When you contract and stretch muscles, move organs around, and come in and out of yoga postures, you help the lymphatic system fight infection, destroy cancerous cells, and dispose of the toxic waste products of cellular functioning.
• Lowers your cortisol levels and makes you happier: cortisol regulates stress so yoga helps you combat anxiety and fight food cravings. 

There’s all kinds of other health benefits like improved fertility, decreased blood pressure and blood sugar, better focus, improved balance, better sleep, help with digestive problems, and more. I encourage you to read the full articles!

http://www.livestrong.com/article/411193-what-are-the-health-benefits-of-yoga-for-women/

http://www.everydayhealth.com/fitness-pictures/10-surprising-health-perks-of-yoga.aspx#05=