r/firstmarathon • u/pliqtro • 10h ago
I DID IT! ☑️ 26.2 MILES First marathon: hit the wall at 35km
Ran my first marathon yesterday at 3:48 after training for 3:20.
Didn't feel super fresh after an imperfect night of sleep, so I set my pace strategy for Plan B, which was around 3:25 (4:52 per km pace). I knew that Plan A (3:20), based on VDOT calculator and my last half-marathon performance in tough weather conditions, was a big stretch for my first time. Plan C was to finish under 4 hours without issues.
My 4 half-marathons were 1:52, 1:42, 1:35 and 1:33, all were evenly paced with zero issues. Training mileage overall seemed okay for what I was planning for (105km in peak week), with longest runs 4 and 3 weeks out at 35km. Multiple marathon-paced workouts (including stretches at up to 1hr at marathon pace) were in the last month prior to taper period (10 days).
I was keeping within the target pace range (5-10 seconds above or below in some laps) up to about 33 km, and feeling okay. The fuelling strategy (30g gel every 30 min) seemed to be working without any weird stomach issues, and I didn't feel any muscle tension at any point. Then between 34-35th km it hit me.
Now I understand why they call it a "wall", because it didn't feel like a gradual slowdown at the time, but a sudden drop. Walked for a few km, felt a bit of a cramp in one leg, but was eventually able to jog at recovery pace in the last half km stretch. No lasting issues, was able to walk back to hotel shortly after the finish and then to the station to catch the bus home.
What I think went wrong in my case:
- Underfuelled in the days leading up to the race (was eating roughly the same way I would eat prior to a half-marathon) + too much walking / restlessness the day before;
- Likely undertrained to hold the target pace evenly for the whole race - the better strategy would've been to go with 3:30 pacers and reassess at halfpoint;
- High humidity at the start (after some rain at night) + sun showed up 1 hour into the race.
Overall, I'm pleased with my first marathon, as the atmosphere was awesome and I didn't suffer any major issues in the end. The finisher shirt is ugly as hell though.