1) Going with the flow: Yoga gets your blood flowing, which helps your circulation, which means you get more oxygen to your cells, which function better as a result. Healthier cells fight off better when you come under attack. If you get sick, you may not be sick for long.
2) Lymph Lesson: when you contract and stretch your muscles, move organs around, and come in an out of yoga postures, you increase the drainage of lymph. This helps the lymphatic system fight infection and dispose of toxins at the cellular level. Again, you're able to fight anything off stronger and more efficiently.
3) Fighting the worry worts: Yoga lowers cortisol levels, the stress hormone that can build up in our bodies. And we all know that an abundance of stress, compromises your immune system.
4)When you practice yoga, the stretching and relaxation helps to alleviate constipation, getting rid of those toxins that your body might otherwise hold on to. Ayurveda, a sister science to yoga, confirms that alot of illness is born by not getting rid of those toxins in the body, they build up over time and this leads to illness and even disease.