Kim, S., Kwon, O., Yi, C., Jeon, H., Oh, J., Cynn, H., & Weon, J. (2011). Comparison of Abdominal Muscle Activity During a Single-Legged Hold in the Hook-Lying Position on the Floor and on a Round Foam Roll. The National Athletic Trainers' Association, Inc.

Kim, Su-Jung, Oh-Yun Kwon, Chung-Hwi Yi, Hye-Seon Jeon, Jae-Seop Oh, Heon-Seock Cynn, و Jong-Hyuck Weon. Comparison of Abdominal Muscle Activity During a Single-Legged Hold in the Hook-Lying Position On the Floor and On a Round Foam Roll. The National Athletic Trainers' Association, Inc, 2011.

Kim, Su-Jung, et al. Comparison of Abdominal Muscle Activity During a Single-Legged Hold in the Hook-Lying Position On the Floor and On a Round Foam Roll. The National Athletic Trainers' Association, Inc, 2011.