I ran for 5 hours 38 minutes. For the first 28km, I ran well with pace around 6 minutes/km. Starting km29, my calves camped both legs, especially the right calf. Since then I managed to walk and run whenever possible.

Breathing: Good. I breathed mostly by noses.
Hydration and Salt: Good. Took 10 salt capsules in total. Drank water at the hydration stations.
Form: Good. No soreness in the body except for the calves.
No rush. Started slowly with slow pace for the first kilometer.
Energy: Still had plenty in the tank at km28. Or might be not since the calf cramping.

Muscle Endurance: Not Good. The leg muscle endurance was not good to handle the load at extended duration.

Action Plan: Specificity. Improve leg muscle endurance.
Increase weekly mileage
Forward deep lunge (5x20 after run)
StrongFirst Uphill protocol with:
      2 minutes uphill lunge
      4 minutes rest
Use a 2-minute timer. So lunge for one timer, rest for two timers. Repeat 10 times or more. Follow ATG rules.
Write daily training in a paper journal. Must be real and specific.

Next run: HCMC Marathon 2025 on Sunday 12-jan-2025.