N. A. Damayanti, N. Nusdwinuringtyas, T. F. Uliana Tambunan, and A. Kekalih, “The Effect of High-Intensity Interval Training on Blood Lactate Levels and Rate of Perceived Exertion in Sedentary Healthy Adults”, J. prof. medika, vol. 16, no. 2, Dec. 2022.