Day 4,510—First day of Altitude Training—
Start time: 4:31 a.m. Weather: High 60s wind .4 mi/h, Humidity 80% I tried on the Bane-style mask yesterday. It has a spot to adjust the difficulty on the outside of the front. There are two settings, and they both go up to four. I looked at the directions, and it said that one controls how much air goes in and one controls how much air goes out. Thinking about how one of the issues is that you don’t breathe out long enough when you’re at high altitude to exhale enough carbon dioxide, then if you were to start breathing rapidly, you would get carbon dioxide poisoning. I had it on the second easiest setting, but after the first mile I changed it to the easiest setting. It was still so frustrating to get used to, and even though I wasn’t going that hard, I could hear myself trying to regulate my breathing, getting there, and then breathing too rapidly again. It was hard to breathe through my nose while wearing the mask, so I resorted to some mouth breathin...
