[quote]outsiderunner wrote:
There is a night/day difference when training in hot, humid weather, and I have learned that there is just no other way to described it--night/day. It is not 10 or 15 seconds of a pace slow down, as those crazy calculators indicate. It is easily 30 seconds, and on the hotter days it is more like a minute slower, and one's endurance really suffers, too. quote]
Yes, that's exactly what I was trying to say earlier. You might as well put the watch away because it is a pointless endeavor. If you use the watch to gauge where your pace should be that day you're simply guessing. If you use it as a benchmark, as in "I was x time last week, y time today week" and then some weeks in the future when the weather improves you say, "I ran z time as compared to a few weeks ago when I ran x and then y", it all means nothing.
Entering any workout on any day, you start off at a particular effort. If wearing a watch, when you hit some defined distance your brain tells you that the effort you just completed was too slow, too fast, or just right. Your brain cannot force your running to improve. Forcing running simply does not work. You have to work with what you have on that day and on the conditions that day.
You will run the effort your body thinks it should run for that day and improve, or you will under-run your training day and still improve (perhaps less), or finally you will over-run your training day and not improve at all. If you really over-run your training, especially over the course of several weeks during a hot summer, you will start to slide backwards, get sick, or get injured.
All I'm trying to say is that effort is your friend. Pace is not.