Even if your main motivation for doing yoga is physical benefits, you will notice the mental benefits of the practice from your first class.
By being aware of our body, and connecting breath with movement, we have something to focus on. At that moment, our thoughts slow down, and we begin to relax. Science has proven time and time again that yoga improves mental health. A single class can remove the stress from that day, and regular yoga practice can relieve symptoms of depression, anxiety, PTSD, and other mental illnesses.