The game grants you the “fatigue reduced” buff corresponding to how much coffee you drink, so by stopping quickly, you are granted a minimal amount, which should only last maybe 5 minutes.

Then, -this is the important part- press your escape/cancel key to stop drinking almost immediately after starting. Make sure you are carrying up to the maximum of +10 Kilograms, or 22 pounds. Make sure it is fully charged.) Perfect weather conditions just means not traveling against heavy winds, for the best results. (By stamina, I’m referring to the white ring in the bottom right. The first thing you’re going to want to do is make sure the weather is right and your stamina is full.