Ryu HJ, Kim JH, Kwon HN, Kim RB, Byun JH, Lee YH, Seo JP.  Effect of Different Types of Foam Rollers on Self-Myofascial Release of the Quadriceps Femoris.  J Kor Phys Ther 2023;35:89-94.  https://doi.org/10.18857/jkpt.2023.35.4.89