The snow has finally melted enough in the mountains for me to take some big all-day hikes... and I'm gaining weight like crazy. Five or more pounds a hike.
I used to have this problem pre-paleo, but always attributed it to the post-hike food binges. This summer I've not only stayed paleo, but kept a food journal, so I know it's not caused by an uptick in calories (or junk food).
It seems like the most logical explanation is water retention, but it takes WEEKS for my weight to come back down. Is the hiking also causing cortisol/metabolism issues?
As a baseline, I lift weights three days a week (skipping a workout if I'm hiking) and leisurely walk in the hills for an hour on non-lifting days. The hikes I'm talking about are around 5-7 hours with several thousand foot elevation changes and rough terrain/snow (i.e., no actual climbing, but the occasional use of an ice axe for safety).