Last summer I got some video of various swimmers at a club in Montreal and I put together some videos that compare two swimmers' butterfly timing:
Above water comparison:
YouTube- Butterfly Stroke Comparison
Below water comparison:
YouTube- Underwater Comparison Of Butterfly Strokes
Above and below of just the lower swimmer:
YouTube- Alfonso Split Screen Butterfly
I wrote some thoughts about the differences in timing here:
mymsc.ca/.../butterfly_stroke_timing
In addition to the timing there are some other issues like kicking from the knee, but I am interested in what approach people would suggest to help this swimmer improve his stroke, whether it be an approach to changing his timing or something else.
I've got a couple swimmers in my club that have similar timing issues and are having a hard time changing.
Thanks in advance for any suggestions!