Yoga has been shown to decrease cortisol levels and improve sleep quality and duration. Research published in the Journal of Alternative and Complementary Medicine found yoga improved cardiovascular health and reduced risk of heart disease. The American Council on Exercise documented improved joint flexibility, reduced stiffness, and strengthened connective tissue. Studies confirm improvements in overall strength, endurance, balance, and coordination with consistent practice. UCLA research found yoga stimulates the lymphatic system, increases white blood cell count, and reduces inflammation.