Over the past two weeks, I've noticed about a 3-4 pound gain in body mass, without any noticeable change in appearance (like muscle definition, or what veins are visible where). I do seem to have the vague impression that I have slightly bigger muscles. (Not explained by resistance exercise: I have not been doing any weights at all for two months due to a fractured radius in my left arm.) I haven't changed my caloric intake or reduced my activity. Could this be storage of water due to an upswing in temperature?
I exercise intensely outside, five days a week or more: it's seven miles each way to cycle to work and back, plus I go running. Recently the weather has gotten hotter. Weather reports are saying "heat wave", yet I'm not feeling it at all (my reaction has been, huh? what heat wave?) In fact, I'm feeling more comfortable outside than, say, a month ago.
For instance, I went for an 8 mile run in the heat of the early to mid afternoon, carrying a mere 750 ml bottle of water. Only a month ago, in spite of cooler weather, my mouth and throat would have been going dry, especially after that water ran out, but even before that. Today I noticed that my mouth never dried up, even over the last two miles when I had no more water in the bottle. I sweated profusely; I could easily wring dripping water out of my shorts by the end of the run. Yet I didn't feel thirsty at all during or after. It didn't even occur to me to drink anything when I returned to the office!
Do people turn to camels when they are used to heat, carrying an extra liter or two of water somewhere?
There is no sign of any humps, though, so if this is really the case, I suppose we will never settle the question whether I'm dromedary or bactrian.