I have, or had, a problem. I swim at the Lifetime Fitness gym in Sandy, Utah, and I like swimming in the outdoor pool as much as I can because there is part of the pool where you can swim lengths that go beyond the 25 meters of the lap pool area.
But today I received the following assignment from my triathlon coach:
This set will establish your “T-time.” After a short warm-up, swim 1000 yards/meters at a constant pace and good effort—as if racing. Record the time in your log. The average pace per 100 will be called your “T-pace.”
Remainder of workout as you feel.
The problem I have…er, had, I hope, is that I didn’t know how far I was swimming when I swam a length. I walked it out one day, and estimated it might be 35 meters across the whole way, but I was only confident to within a meter or two. Luckily, I’m not as dumb as I look.
Enter Google Maps. I looked up the address of the gym, and sure enough, Google Maps allowed me to zoom all the way in on the pool and get the above image. Now, I know the lanes are 25 meters. All that was left to do was a little work in Photoshop as follows:
1. Measure the pixels for the 25 meter area. Pixels = 220
2. Measure the pixels for the entire distance, including the 25 meter area. Pixels = 340
3. Simple math – (25/220) x 340 = 38.6ish
In other words, the pool would appear to be 38.6ish meters per length, or roughly 77 meters per lap. However, the major problem with my method is that even though I could zoom as far in on the pool as I did, it’s still a fairly blurry image, so I estimate I could be off by as much as 1 to 1.5 feet on the length, and I would like to be exact. So, tomorrow morning what will I be taking to the gym? That’s right, a tape measure. I just know I won’t be able to sleep soundly at night until I know for sure.