Ran my first half-marathon yesterday: 2:03:33.
The first 17km felt controlled. Power on target, everything according to plan. Then km 18 happened, and the plan left the chat.
Lost 75 seconds per km over the final 4km. The post-race data analysis was clear: turns out I was running on half the fuel I needed (49g carbs/hour instead of 80+) while holding a power target (303W of CP 325W) that was too ambitious for the duration.
Lessons were learned here.







