I spent all last week chasing elk at 10,000-11,000'. I'm back home now at 1,200' and resumed my exercise regimen this evening. Today's combination of bodyweight and sandbag movements with 250 yd jogs between sets, which I was completing in 13.5-14 minutes all summer (usually in 90+°F heat), kicked my butt and took me 18.5 minutes to complete (at a very pleasant 80°F). If anything, I was expecting that my week at high altitude would make my workouts seem easier. Anyone else ever notice decreased gym performance right after a mountain hunt? Maybe it's just my broken heart over not killing an elk that's weighing me down.