Originally Posted by
Malto
Let me give you a couple other thoughts as you move from 20 mile days into the higher ranges.
1) Fueling becomes more important. What works for 20 may not work for 30 and beyond.
2) Hydration and Electolytes. Again, as you push the mileage limited you will likely find that you need a better strategy.
3) Chafing and blisters. This may also come in to play at some point even if you had zero issues at 20.
4) Recovery. I believe this is likely the most important and hardest to master. While I don't believe this played much of a role in your issues on day 2, it may have showed up later that day. My four goals for recovery: energy, protein, hydration and nutrition. Basically you need to give your body all the tools it needs to do maximum repair over night. Master 1 & 2 above and it will make the task easier.
5) Mental. This was your big win from your hike. How you view a certain distance mentally, say a 30 or 40 mile day, will greatly impact your chances of success. Prior to doing my first 30+ mile day I thought only the immortals like Skurka or Williamson could do distances like that. After many years of doing that distance and more on a regular basis I mentally view a 30 mile day as a relatively easy day. It changes your whole outlook. In your case, having done 37, you have broken the mental barrier and expanded the world of the possible.
6) Logistics. Little things during the day add up. Dogwood mention this above, people doing the high mileage aren't walking particularly fast, they are walking very consistently steady. As I did many of my training hikes prior to my PCT thru, I used to keep track on the time that I was stopped. It became a game to see how little time I would stop during the day. This contrasts with my earlier hiking where I would take regular breaks, which I believe are somewhat counter-productive.
Hope your recovery goes well. Sounds like you have been bitten by the bug. I suspect you will soon learn that there are many cool trips that you can now do in a limited timeframe.