Here is a fun and interesting video I found on YouTube. It is a computer model of a person swimming each of the four strokes. The muscles light up purple whenever they are activated or used. This was developed by a Dr. Nakashima at the Tokyo Institute of Technology. I am not sure how this was created or what methods were used to determine when certain muscles are activated, but it is interesting to look at nonetheless. One thing to notice - look at how often the abs light up in each stroke - see, dryland really is important!
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