Boost Ultra-Running Performance with 3 Targeted Speed Sessions (Even When Time Is Tight)
Finding speed in the gaps
Ever stood at the start of a 100 km trail, the horizon a blur of trees and gravel, and wondered whether the miles you’ve logged will ever translate into a faster ultra?
The question haunted me during a long run through the Scottish Highlands. Thirty kilometers in, legs tired and the familiar sting of “I should be faster,” I found myself on a hillside. I paused, took off my shoes, and sat for a moment. What struck me then: maybe the key wasn’t grinding out more kilometers. Maybe it was the quick, intense work tucked between the long runs.
The story behind the hill
For ten years, I tracked distance, marathons, 50 k, 100 k, assuming more miles meant more speed. But that afternoon taught me something different. I recalled research on interval training: fast work triggers physical changes that slow work doesn’t. When you push the body past a certain threshold, you build mitochondrial capacity, clear lactate faster, and sharpen movement. The result: your everyday runs feel lighter and quicker.
A Journal of Applied Physiology review from 2019 made this concrete: 20 minutes of focused speed work can deliver the same VO₂max boost as 2 hours of easy running. The secret isn’t piling on volume, it’s nailing the effort.
Why short speed sessions matter for ultra runners
- Time‑efficient efficiency – A 30‑minute session at high effort yields the same cardiovascular benefit as a 2‑hour easy run, saving you hours in the week.
- Improved running economy – Faster paces demand a quicker turnover and cleaner form, which means less wasted energy when race day comes.
- Mental resilience – Short, intense bursts build a kind of mental toughness. You learn to handle discomfort without panic, a tool that saves you when the kilometers pile up.
- Pacing awareness – Repeating work at set effort levels trains your body and mind to read ‘hard’, ‘steady’, and ‘easy’ instinctively, so race decisions come naturally.
Self‑coaching with modern pacing tools
Once I started using a personalised pacing system, training shifted from intuition to numbers I could trust. Here’s what becomes possible:
- Personalised pace zones: Set your own heart‑rate or effort targets, so each workout has a clear ceiling and floor, no second‑guessing whether you’re working too hard or coasting.
- Adaptive training plans: The app tweaks future sessions based on today’s effort. Struggled with the pace? Next week comes with a bit more breathing room.
- Custom workouts: Build your own sessions, 3‑minute repeats, 800s, hill ladders, and let the tool manage the clock, splits, and recovery windows.
- Real‑time feedback: A quick glance mid‑run shows whether you’re on target or drifting, keeping you accountable without needing a coach.
- Collections & community sharing: Gather a set of speed sessions into a collection and share with other ultra runners, trading ideas and staying motivated.
These tools sit in the background, you’re still running, still feeling it, but the data strips away the confusion that leads to skipped workouts or needless burnout.
A practical, starter speed workout
Goal – Boost top‑end speed while keeping the session under 30 minutes.
Warm‑up (10 min)
- 5 min easy jog
- 3 min of building strides (pace climbs gradually)
- 2 min easy jog to prepare
Main set – 3‑minute repeats (target 5 km race pace, about 85% of max heart‑rate)
- 3 min at hard effort (keep it steady and under control; your pace zone keeps you honest in the ‘hard’ range)
- 2 min recovery jog or walk
- Repeat 6 times (30 min total including rest)
Cool‑down (5 min)
- Slow jog until your heart rate settles into the easy zone.
How to use the pacing tool
- Lock in your target ‘hard’ zone for the heart‑rate.
- Turn on adaptive mode, if repeats feel unsustainable, next week eases up on recovery.
- After the run, dig into the analysis: average pace, heart‑rate creep, and how stable you stayed across reps.
Closing thoughts
Ultras ask for patience, but the breakthroughs come from those sharp, brief pushes woven between the long miles. A handful of quality speed sessions gives your body what it needs and sharpens your instinct for race pace.
Ready to test the 3‑minute repeat? Run it next week. Use a pacing tool to stay accurate, log what happens, and tell other runners how it went. You might find your next ultra clicks a little easier.
References
- Cross-Training, Blog, James Runs Far (Blog)
- Training, Blog, James Runs Far (Blog)
- Strength Training, Blog, James Runs Far (Blog)
- 3 Speed Sessions to Make the Most of Limited Training Time AND Improve Your Ultra-Running, James Runs Far (Blog)
- Speed Workouts, Blog, James Runs Far (Blog)
- 5 Short Training Sessions That Will Improve Your Ultra-Running, James Runs Far (Blog)
- Tempo, Blog, James Runs Far (Blog)
- Hill Repeats, Blog, James Runs Far (Blog)
Collection - Find Speed in the Gaps: 4-Week Intro Program
The 3-Minute Repeater
View workout details
- 12min @ 6'30''/km
- 6 lots of:
- 3min @ 4'30''/km
- 2min rest
- 12min @ 7'00''/km
to import the collection after you install it.
