When you start a new discipline, the beginnings are usually the most complicated, learning something new is usually difficult because it is when you make the most mistakes and that makes you feel somewhat clumsy which can become frustrating depending on the degree of difficulty in the task done.
Now, riding a bicycle is relatively easy, it does not have any degree of difficulty, nor does it require as much practice in its execution until it reaches perfection as other disciplines, its turning point comes in the fatigue / tiredness generated by the routes with a certain degree of difficulty / demand for which you feel that you are not physically or mentally prepared. It is not easy to be ridden pedaling for more than 3 hours, it requires a mental push to get to the end and complete the scheduled route.
After completing a route of one hundred kilometers with a moving time of 5 hours, which so far is the longest in the month that I have been riding, I have verified how my physical capacity has improved compared to a few weeks ago, wearing our Bodies and capacity for suffering to the limit makes it substantially increase our capacities, both physical and mental, when you feel that you cannot take any more and continue, you are exceeding your limits that will make you continue to improve little by little in the task that you are dedicating. effort.
When you feel like you can't go any further, continue. That is the profit.