Yamakawa, Keisuke Kobayashi Effect of increased kick frequency on propelling efficiency and muscular co-activation during underwater dolphin kick. [electronic resource] - Human movement science Aug 2017 - 276-286 p. digital Publication Type: Journal Article ISSN: 1872-7646 Standard No.: 10.1016/j.humov.2017.06.002 doi Subjects--Topical Terms: Biomechanical Phenomena--physiologyElectromyographyFemaleHamstring Muscles--physiologyHumansMuscle, Skeletal--physiologyQuadriceps Muscle--physiologySwimming--physiologyThigh--physiologyYoung Adult