Brotons-Gil, E., García-Vaquero, M. P., Peco-González, N., y Vera-Garcia, F. J. Flexion-rotation trunk test to assess abdominal muscle endurance: reliability, learning effect, and sex differences. Journal of Strength and Conditioning Research, 27,1602-1608.
http://journals.lww.com/nsca-jscr/Abstract/2013/06000/Flexion_Rotation_Trunk_Test_to_Assess_Abdominal.19.aspx
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