Types of Running Workouts
A good training plan is a small set of workout shapes, repeated and arranged so they build on each other. Each shape has a distinct job — and most of them, by design, should feel easy. Here's what each one is and how it should feel, so the names on your calendar make sense.
Easy and recovery runs
The foundation of the plan and the bulk of your week. Easy runs are run at a conversational pace — you can speak in full sentences — and should leave you feeling refreshed, not drained. This isn't junk mileage: easy volume builds the aerobic engine, and the evidence is consistent that roughly 80% of training should sit at this low intensity1. Recovery runs are the same idea, even gentler, the day after something hard.
Long runs
The week's longest effort, building endurance and durability — time on your feet. Usually run at easy effort, sometimes with faster work folded in late (a marathon-pace finish, for example). It's typically the hardest day to recover from on volume alone, which is why it's surrounded by easy days.
Strides
Short, controlled accelerations — about 15–20 seconds, fast but relaxed, with full recovery between — usually tucked into the end of an easy run. They sharpen leg speed and running mechanics for almost no fatigue cost. (See the dedicated strides article for how to do them.)
Tempo and threshold runs
These live around "comfortably hard." A tempo run is a sustained effort a bit slower than threshold — controlled discomfort you could hold for a while. A threshold run works right at your lactate threshold (the fastest pace you can sustain without fatigue snowballing), often as longer intervals (e.g. 4 × 8 minutes). Both raise the pace you can hold for a long time, which is why they're staples of half-marathon and marathon builds.
Intervals (VO₂max work)
Hard repeats at around 5K effort or faster — think 5 × 1 km or 6 × 800 m — with full recoveries. They push your aerobic ceiling and sharpen turnover. They should feel hard, with recovery genuinely needed between reps; quality matters more than completing the count, so it's fine to stop a rep or two early if form falls apart.
Hill repeats
Repeated hard efforts running uphill with an easy jog or walk back down. The grade builds power and strength with less impact than flat speedwork, and it's a gentle on-ramp to faster running. Run them strong and tall, not as all-out sprints.
Fartlek, progressions, and race-pace work
A few more shapes round out a plan. Fartlek ("speed play") is unstructured surging within a run — faster and easier by feel rather than stopwatch, great for variety or unpredictable terrain. A progression run starts easy and gradually gets faster, finishing with a controlled push. Race-pace workouts rehearse your exact goal pace (and race-day fueling), building pace-specific economy and confidence in the weeks before a race.
The art is in the mix
No single workout type makes you fast — the magic is in how they're combined and sequenced across a training block, mostly easy with a small, well-placed dose of hard. How that sequence is built is the subject of periodization.
Sources
- Seiler S. What is Best Practice for Training Intensity and Duration Distribution in Endurance Athletes? International Journal of Sports Physiology and Performance 5(3):276-291 (2010). (Review of elite endurance athletes across multiple sports) ↩
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