“Effects of Purple Tea on Muscle Hyperemia and Oxygenation, Serum Markers of Nitric Oxide Production and Muscle Damage, and Exercise Performance ”, JEN, vol. 3, no. 3, Jul. 2020, Accessed: Apr. 15, 2026. [Online]. Available: https://journalofexerciseandnutrition.com/index.php/JEN/article/view/71