Critical Arm Positions in Butterfly
Quantitative Data Supplements Qualitative Evaluations of Butterfly Swimming
Ted Becker, Ph.D. & Rod Havriluk, Ph.D.
XIth International Symposium on Biomechanics and Medicine in Swimming
Oslo, Norway, 2010.
During the beginning of the butterfly pull, the mechanical advantage (leverage) increases with the change in the angles at the shoulder and elbow. Therefore, it was hypothesized that hand force would significantly increase with two events: 1) when the hands first submerge below the level of the shoulders and 2) when elbow flexion begins.
Evaluating Butterfly Swimming Technique