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Two points of interest for today. Want to improve your swimming technique check out JimmyD Shea on youtube. I found it to a great ; no matter what specific stroke you want to hone in on. Check out the butterfly stroke first. He seems like a cool dude!
Second, just finished a book "The Boston Marathon" written in 1979. Supposedly, and I may try this, in hot weather when the sweat/salt runs off your forehead into your eyes, some seasoned runners will apply vaseline to their eyebrows. Apparently the perspiration runs off the vaeline down the side of your face & not into your eyes.