The moderate run is one of the most misunderstood runs among runners.
While many athletes are aware that moderate runs are faster than easy runs but slower than tempo runs, they can’t pinpoint the pace or heart rate range for these steady runs. What’s more, many training programs don’t feature them at all, even though they’re a useful tool for enhancing aerobic capacity.
But to get the most out of moderate runs, they need to be scheduled strategically.
What Is a Moderate Run?
The definitions of moderate runs vary across coaching systems, but in my definition, it is best described as a ‘brisk easy run’. It’s not a key workout, and it’s not an easy run you can throw in after a hard session either.
Intensity
In a 5-zone model, the moderate run sits at the edge between zones 2 and 3, with its upper end at the aerobic threshold (LT1). That’s the point at which lactate rises above baseline and breathing deepens, which is why it works as the ceiling for steady aerobic running. The gap to marathon pace depends on your level: for most trained runners, moderate sits just below marathon pace, while for advanced runners it falls well below it. On an RPE scale of 1 to 10, it’s a 4 to 5 effort.
Duration
Pure steady-state runs can be anywhere from 30 to 90 minutes long, depending on your current training level and training phase. But in practice, it’s quite common to divide a training run into different segments. For example, a 15-mile run can be composed of 10 miles at an easy pace and 5 miles at a moderate pace. That can also be applied to shorter runs, of course.
Moderate Run vs Easy Run
Many runners fail to distinguish between truly easy running and moderate efforts, thereby sabotaging their training. Moderate runs drive greater adaptation per unit of time, but they also entail a higher recovery cost. If in doubt, go for the easy run.
Training Purpose and Adaptation
Running faster than an easy pace yields benefits, provided you can recover in time. Above all, moderate runs recruit a slightly broader pool of fibers than easy runs do, and when sustained or run on tired legs, they begin engaging the type IIa fibers that marathon and half-marathon pace depends on late in a race. Training those fibers to work aerobically is what makes moderate a useful bridge toward race pace later in the cycle, when stamina is paramount.
Recovery Cost and Fatigue
But as beneficial as a moderate run can be, keep in mind you pay a higher recovery tax compared to easy runs. Whereas easy runs rely on 30 – 50% glycogen, moderate runs fuel on 50 – 70% glycogen. That may not sound like much of a difference, but over the course of an hour, that’s a significant dent into your glycogen reserves.
Physiological Benefits of Moderate Runs
Moderate runs do everything easy runs do, but with more potency. The demands on the aerobic, metabolic, and musculoskeletal systems are significantly higher, leading to increased adaptations.
Aerobic System Adaptations
The higher cardiac output during moderate runs means the left ventricle ejects more blood per beat, thereby increasing stroke volume, a key driver of a high VO2 max. Regular work at this intensity also increases blood plasma volume, yet another factor closely tied to your maximal aerobic capacity. The combined result is a lower heart rate at the same pace across all training paces.
But there are also aerobic adaptations on the muscular level. Moderate running promotes increased capillarization, greater mitochondrial density, and increased levels of oxidative enzymes. It does so by recruiting a broader pool of muscle fibers than purely easy runs, including some intermediate fast-twitch fibers.
Lactate Regulation and Metabolic Stability
A key feature of the moderate run is its intensity, which sits right at the edge of the aerobic threshold (LT1), training the body to clear lactate as fast as it is produced. The result is an upward shift of LT1, so you can hold a higher pace before lactate begins to accumulate. Pushing your LT1 upward also affects your anaerobic threshold (LT2).
Repeated work at a moderate pace also improves glycogen storage and utilization. The key adaptation here is that the training stimulus targets a broader pool of slow-twitch fibers than easy runs. It also teaches the body to shift smoothly between fat and carbohydrates as demand changes.
Musculoskeletal Durability
Moderate runs also build a bridge to faster workouts early in the training cycle. Loading rate, propulsive force, and Achilles/calf tension rise meaningfully with faster paces. Moderate runs in the base phase and early foundational phase prepare your muscles, ligaments, and tendons for the higher impact as the training cycle unfolds.
As tendons stiffen, holding faster paces in later training cycles becomes metabolically cheaper through an improved running economy. This makes a moderate pace a great transitioning intensity without overly taxing your body.
Moderate Run Workouts
A moderate pace can be woven into your training runs in various scenarios. The classic is the steady-state run but a moderate intensity can also pull its weight in alternations and long progression runs.
Steady-State Run
The purest expression of a moderate run is the steady-state run. It’s a continuous effort at the upper end of zone 2 and lower end of zone 3, wrapped in an easy warm-up and cool-down. The moderate-intensity portion is typically 20-40 minutes, but can be much longer for advanced runners. Just pay attention not to slip into threshold territory even though you feel good.
Alternations
You can also float between two paces on a repeating cycle. For example, if you neither want a purely easy nor moderate run, simply go back and forth between these 2 intensities in an interval-like fashion. But you can also use the moderate intensity as the recovery segment for a marathon-specific alternation workout, for example.
Long Progression Run
A third option a progression run. Here, you start at an easy pace, then increase to a moderate pace. A moderate pace is also a great final segment for many of your long runs. Start by ending long runs with a short segment at a moderate pace until you can comfortably cover the full distance at that intensity as you get fitter from week to week.
How to Use Moderate Runs in a Structured Training Week
The timing of moderate runs within your training week is important. If placed the day after a particularly hard workout, it can hinder adaptation. But when placed strategically, it will enhance your overall running performance.
Base Phase Aerobic Development Runs
During the base phase, you carry little risk of overtraining. There are no hard sessions to recover from. In my training plans, I like to include a moderate run on the same weekday, followed later by tempo and threshold work.
Moderate Segments Within Long Runs
In the long run, I like to build to a reasonable long-run distance of easy running first, before adding moderate intensity. That means moderate pace is more common in the foundational phase once the base phase is completed. This helps transition to the faster paces necessary for HM and marathon races. For 5K and 10K runners, it’s less race-specific but can be included as well if you can recover in time for the two intense workouts during the week.
Aerobic Support Between Hard Workouts
During the foundational and race-specific phase, the ideal placement is 2 days after your first key workout and 1 day before your second key workout of the week. This way every key workout is still followed by an easy run or rest day.
Common Mistakes When Running at Moderate Intensity
As we have seen, there are real benefits of moderate runs when they are placed and executed correctly. But mind the 3 common errors that are associated with moderate running.
Running Moderate Too Frequently
There is no hard rule on how often you can run at moderate pace. Much depends on your runner type and your ability to recover. Runners with predominantly slow-twitch fibers can typically handle more moderate runs than explosive runners, and you young runners can also fit in more moderate runs than masters athletes. If in doubt, err on the side of caution or experiment with the number of moderate runs you can handle.
Turning Easy Days Into Steady Efforts
Running easy runs too fast is by far the most common error of amateur runners. When you’re supposed to run easy, like after hard workouts, speeding them up to moderate can hinder recovery, blunt adaptations from prior workouts, and reduce your capacity for upcoming hard workouts. Easy runs have their purpose.
Drifting Into Threshold Intensity
You can also run moderate runs too fast. The upper intensity should be the aerobic threshold (LT1). Once you cross that physiological marker, you’ll be in tempo run territory. It’s easy to slip in there as that’s a comfortable, challenging effort. But just because it feels right or you can run faster doesn’t mean you should. There’s no point in winning the battle of today if you lose the war in your upcoming race.
