
Episode 7 - Fuel Utilisation Why Pace Changes What You Burn (and Why It Matters for Ultras)
This episode explains fuel utilisation in simple terms: your body is always using a mix of fat and carbohydrate, but the harder you run, the more you rely on carbs.The key message is that many runners...
6 Maalis 10min

Episode 6 - Why Lactate Threshold Is the Real Ultra Performance Metric
In this episode, we unpack why lactate threshold is one of the most useful predictors of ultra performance, not because you race at threshold, but because it sets the ceiling for what “sustainable” fe...
27 Helmi 10min

Episode 5 - Why Consistency Beats Motivation
Motivation is a mood, it comes and goes. Consistency is a system, it keeps you training even when life gets messy. This episode explains why relying on “feeling like it” leads to stop-start training, ...
20 Helmi 9min

Episode 4 - Why VO₂max Doesn’t Win Ultra Races
VO₂max measures your maximum aerobic capacity, but ultra races are not performed anywhere near that intensity. What decides performance is not how big your “engine” is, but how efficiently and sustain...
13 Helmi 5min

Episode 3 - Why intensity works… until it doesn’t
Intensity can drive quick improvements in trail running performance but only for a short time. Hard sessions create a strong training signal, yet they also generate fatigue faster than they build fitn...
6 Helmi 6min

Episode 2 - Why Downhill Running Destroys So Many Ultra Races
Most ultra runners don’t lose races on the climbs—they lose them on the descents.In this episode of The Trail Running Briefing, we break down why downhill running causes so much damage despite feeling...
30 Tammi 6min

Episode 1 - Why does your fitness drop even when you train more?
This episode explores a common frustration among runners: increasing training volume or intensity, yet feeling slower, heavier, and less fit. The key message is simple, fitness doesn’t come from train...
28 Tammi 5min



















