# running / London Marathon 2025: Week 5

⬅️ London Marathon 2025: Week 4 London Marathon 2025: Week 6 ➡️

8th Feb 2025

Goals for the week

Medium Long Run

My only increase in mileage was adding a mile to this run. I usually dread this run most because it’s a lot to do early, but I’ve been enjoying them! This one felt good, smooth, and fun.

Long run

Same length as last week: 16 miles. Heavier legged, and a bit slower, but that’s the name of the game: accumulated fatigue.

Enjoyed anyway, in the rain and cold.

SiS gels

This is the best progress of the week honestly.

I used the SiS isotonic gels in my previous marathon and they worked great.

I’ve been trying Maurtens recently but found them landing heavy in my stomach.

Switching back to SiS, both for the medium-long and long runs, and problem solved.

The consistency & texture isn’t as nice as Maurten, but they go down easy. Predictable fuelling without side effects is all I need.

Thoughts

4th week in the mid-40 mileage. Sitting pretty. Nothing crazy. Holding mileage and staying healthy is the game.

Really happy with how I’m feeling. The routine is bedded in, and the fatigue is manageable.

90% of marathoning is sensibly accumulating fatigue over weeks. No need to go crazy. Just hold on.

Getting excited now, with 11 weeks to go.

Goals for next week

Week 6 is more of the same. I’m adding a single mile to the weekly routine, getting the mid-week medium-long run into 90-minute territory.

⬅️ London Marathon 2025: Week 4 London Marathon 2025: Week 6 ➡️