How Many Speed Workouts Per Week for Marathon Training?

Table of Contents

1. Introduction
2. The Physiology of Speed: Why Fast Running Makes You a Better Distance Runner
3. Determining the Frequency: How Many Speed Workouts Per Week?
4. The Essential Toolkit: Types of Speed Workouts for Marathoners
5. Adjusting Speed for Your Experience Level
6. The Mental Edge: Pushing Through the Discomfort
7. Recovery: The "Secret" Second Half of Speed Training
8. Fueling the Fast: Nutrition Strategies for Intensity
9. Summary of Speed Frequency and Benefits
10. FAQ

Introduction

According to a study published in Physiological Reports, runners who incorporated just ten sessions of high-intensity speed training over six weeks improved their 10K times by an average of 3.2%. For a 50-minute 10K runner, that is the difference between crossing the finish line at 50:00 or at 48:25. While a marathon is often described as a test of endurance rather than a sprint, the physiological adaptations triggered by running fast are exactly what you need to sustain a challenging pace for 26.2 miles. Many runners believe that marathon training is purely about the "long slow distance," but ignoring the top end of your aerobic capacity is a missed opportunity for performance.

We believe that every athlete, from the first-timer to the seasoned veteran, deserves to know the "why" behind their training. At BUBS Naturals, we are driven by the legacy of Glen “BUB” Doherty—a man who lived for adventure and never settled for mediocrity. That same spirit of excellence is what we bring to our supplements and what we hope to inspire in your training. Whether you are aiming for a Boston Qualifying time or simply looking to finish your first marathon feeling strong, understanding how to balance intensity with volume is critical.

In this guide, we will explore the science of speed, debunk common myths about interval training, and provide a clear answer to the central question: how many speed workouts per week should you actually perform? We will also look at how to fuel these high-intensity efforts using clean, functional nutrition like the Hydration Collection, ensuring your body has the minerals it needs to perform at its peak. By the end of this article, you will have a comprehensive framework for integrating speed into your schedule without risking burnout or injury. Together, let’s look at how to turn those grueling interval sessions into your secret weapon for race day success.

The Physiology of Speed: Why Fast Running Makes You a Better Distance Runner

To understand how many speed workouts you need, you first have to understand what happens inside your muscles when you push the pace. Most of your marathon training occurs in the aerobic zone, where your body uses oxygen to produce energy. However, speed work—running at or near your VO2 max—triggers unique adaptations that easy runs simply cannot replicate.

One of the most significant benefits is the increase in myoglobin production. Myoglobin is a specialized protein in your muscle fibers that captures oxygen and carries it to the mitochondria, which are the "power plants" of your cells. The mitochondria then use that oxygen to produce ATP, the fuel your muscles need to contract. Research indicates that high-intensity running is the most effective way to stimulate myoglobin development. When you have more myoglobin, your body becomes significantly more efficient at delivering oxygen to the working muscles, allowing you to maintain a faster pace for longer.

Furthermore, speed workouts recruit intermediate and fast-twitch muscle fibers that often sit dormant during slow, easy runs. By teaching these fibers to fire, you improve your running economy. Running economy is essentially your "gas mileage." If two runners have the same VO2 max, the one with better running economy will use less energy to maintain a 9:00-minute mile. Speed work refines your form—your knees drive higher, your foot strike becomes more precise, and your arms pump more effectively. This efficiency is what saves you in the final six miles of a marathon when your form typically begins to crumble.

To support these high-intensity physiological demands, we recommend prioritizing your electrolyte balance. When you are pushing your limits during a speed session, you aren't just losing water; you are losing critical minerals that govern muscle contraction and nerve signaling. Utilizing the Hydration Collection ensures that you are replenishing sodium, potassium, and magnesium without the artificial sugars found in traditional sports drinks. This "no-BS" approach to hydration mirrors the precision of a well-executed interval session.

Determining the Frequency: How Many Speed Workouts Per Week?

The most common mistake marathoners make is either doing too much speed or none at all. The sweet spot for the majority of runners is one to two quality speed sessions per week. However, this is not a hard and fast rule; it depends heavily on your total weekly mileage, your injury history, and your specific goals.

For most amateur runners, one dedicated speed session per week is sufficient. When you consider that a marathon training plan also includes a weekly long run—which is a significant stressor on the body—adding more than one high-intensity interval session can lead to overtraining. We often think in seven-day cycles because that is how our calendars work, but your body doesn't know what a Monday is. Some of the most successful marathoners actually utilize a 10-day training cycle. In this model, you might have one speed workout, one tempo run, and one long run every ten days, with plenty of easy recovery runs in between.

If you are a high-volume runner (averaging 50+ miles per week), you might incorporate two speed sessions. For example, a Tuesday might be dedicated to short, sharp intervals like 400m repeats to work on leg turnover and VO2 max, while a Friday might involve a tempo run or "marathon pace" intervals. However, even for elites, the total volume of "hard" running rarely exceeds 20% of their total weekly mileage. The other 80% should be at an easy, conversational pace.

Balancing this intensity requires a dedicated focus on recovery. This is where supplements like our Collagen Peptides come into play. Speed work places immense stress on your tendons, ligaments, and joints. Hydrolyzed collagen supports the structural integrity of these connective tissues, helping you bounce back faster for your next session. By integrating Collagen Peptides into your post-workout routine, you are giving your body the amino acids it needs to repair the micro-trauma caused by hitting those fast splits on the pavement.

The Essential Toolkit: Types of Speed Workouts for Marathoners

Not all speed work is created equal. To prepare for 26.2 miles, you need a variety of stimuli. Here is how we categorize the most effective workouts for marathon success.

Strides: The Foundational Speed

Strides are short, 20-second bursts of speed, usually done at about 90% of your maximum effort. They aren't full sprints, but they are fast enough to require excellent form. Strides are best performed after an easy run once or twice a week. They serve as a bridge, teaching your nervous system how to handle speed without the metabolic fatigue of a full workout.

Interval Training: Building the Engine

Intervals are structured repetitions with specific rest periods. For marathoners, these are typically performed at 5K to 10K pace. Common workouts include 8x800 meters or 12x400 meters. The goal here is to spend time at a high heart rate to improve your aerobic ceiling. If you’re heading to the track for these, make sure you have your Hydrate or Die – Lemon ready. The fast-acting electrolytes help maintain muscle function during those intense repetitions where sweat rates are highest.

Fartleks: Speed Play

"Fartlek" is Swedish for "speed play." Unlike intervals, which are measured by distance, fartleks are usually measured by time and feel. A simple fartlek might be 10 repetitions of 1 minute fast followed by 1 minute of easy jogging. Because they are less rigid than track workouts, fartleks are excellent for building mental toughness and learning how to fluctuate your pace on undulating terrain.

Tempo Runs: The Lactate Threshold

While some coaches classify tempo runs separately from "speed work," they are essential for marathon speed. A tempo run is a sustained effort at a "comfortably hard" pace—roughly what you could hold for an hour in a race. This training improves your lactate threshold, allowing you to run faster before your muscles begin to feel that familiar "burn."

To maintain mental clarity during these longer, sustained efforts, many runners find that starting their morning with MCT Oil Creamer provides a steady source of energy. Unlike sugar-heavy pre-workouts, the C8 and C10 medium-chain triglycerides in our MCT Oil Creamer offer a clean fuel source that supports cognitive function, helping you stay locked into your target pace when the workout gets tough.

Adjusting Speed for Your Experience Level

Your weekly mileage dictates how much speed your body can handle. A runner logging 25 miles a week has a very different recovery profile than someone logging 70.

For the beginner runner (under 30 miles per week), speed work should be introduced gradually. We recommend starting with just strides for several weeks before moving into a single weekly session of short intervals, such as 5x600 meters. At this stage, the primary goal is simply to get the legs used to a faster turnover.

Intermediate runners (30-60 miles per week) are in the "sweet spot" where they can usually handle one robust speed session and potentially a second session that focuses on marathon-specific pace. A classic workout for this group is 6x800 meters at 10K pace with a 400-meter jog recovery. This builds the stamina needed to hold a strong pace even as the miles add up.

Advanced runners (60+ miles per week) have the aerobic base to handle higher volume speed work. This might look like 10x800 meters or even mile repeats. For these athletes, the challenge isn't just the workout; it's the cumulative fatigue. High-mileage athletes must be even more diligent about their micronutrient intake. We suggest adding Vitamin C to your daily regimen. Vitamin C supports antioxidant activity, which is crucial when you are constantly putting your body through the oxidative stress of high-mileage and high-intensity training.

The Mental Edge: Pushing Through the Discomfort

Speed work is as much a mental exercise as it is a physical one. Marathon racing requires a specific kind of grit—the ability to stay calm while your body is screaming at you to stop. Speed workouts teach you to cope with that physical discomfort in small, manageable doses. When you are in the middle of a 4x1-mile repeat session, you are practicing the mental cues you will use at mile 22 of the marathon.

We often talk about the "BUB" way of doing things—facing challenges head-on with a smile and a sense of purpose. Glen Doherty didn't just train to be "good enough"; he trained to be ready for anything. Applying that mentality to your speed work means showing up for the workout even when you’d rather stay in bed. It means hitting your splits not because you have to, but because you are committed to your own growth.

To keep your mind and body in sync, simple daily habits make a big difference. Many of our athletes use Apple Cider Vinegar Gummies as part of their morning routine. These gummies, made with "the Mother," support general wellness and digestion, ensuring that your body is a well-oiled machine ready to tackle the day's training. When your internal systems are functioning smoothly, it’s much easier to find that extra gear during a hard interval set.

Recovery: The "Secret" Second Half of Speed Training

You don't get faster during the workout; you get faster while you sleep and recover afterward. Speed work causes microscopic tears in your muscle fibers and places significant strain on your nervous system. If you don't recover, those speed sessions will eventually lead to injury or "staleness."

One of the most effective ways to support muscle recovery and power output is through the use of Creatine Monohydrate. While often associated with bodybuilders, creatine is incredibly beneficial for endurance runners. It helps replenish ATP stores more quickly, which is essential for the "explosive" nature of speed work. Our Creatine Monohydrate is NSF for Sport certified, meaning it has been rigorously tested for purity—a must for any serious athlete.

Furthermore, we suggest looking at your hydration beyond just the workout window. The Hydrate or Die – Mixed Berry is a fantastic way to ensure you stay hydrated throughout the day. Chronic dehydration is a leading cause of fatigue and poor workout performance. By sipping on electrolytes throughout the afternoon, you ensure that your muscles are pliable and ready for tomorrow's run.

Finally, never underestimate the power of a "down week." Every three to four weeks, you should reduce your total mileage and intensity by about 30%. This allows your body to fully absorb the training adaptations from the previous weeks. During these weeks, you might replace your intense interval session with a few light strides, giving your central nervous system a much-needed break.

Fueling the Fast: Nutrition Strategies for Intensity

High-intensity running relies heavily on glycogen—the carbohydrates stored in your muscles and liver. If you go into a speed workout with "empty tanks," you won't be able to hit the necessary intensity to trigger the adaptations we've discussed.

In the hours leading up to a speed session, focus on easily digestible carbohydrates. After the workout, your priority should be protein and electrolytes. A post-workout smoothie containing Collagen Peptides and a scoop of our MCT Oil Creamer can help jumpstart the recovery process. The collagen provides the building blocks for tissue repair, while the MCTs offer a quick source of energy to help you power through the rest of your workday.

We also recommend the Hydrate or Die – Bundle for runners who are in the peak of their marathon build. Having both flavors on hand ensures you never get "flavor fatigue" and stay committed to your hydration goals. Remember, a 2% drop in hydration can lead to a significant decrease in athletic performance. In a speed workout, that could be the difference between hitting your 800m split or falling 10 seconds behind.

By focusing on clean, simple ingredients, we ensure that your nutrition is never a bottleneck for your performance. Our products are designed to mix easily into your life, whether you are at home or using our travel packs on the way to the track. This commitment to quality is our way of honoring Glen Doherty’s legacy and supporting your journey toward a new personal best.

Summary of Speed Frequency and Benefits

Integrating speed work into your marathon training is about quality over quantity. To recap:

• Most runners should aim for one to two speed workouts per week.
• Speed work improves running economy, increases myoglobin, and recruits fast-twitch fibers.
• Types of speed include strides, intervals, fartleks, and tempo runs.
• Nutrition and recovery are non-negotiable. Using the Hydration Collection and Collagen Peptides can significantly improve your ability to handle high-intensity stress.

Remember the "10% Rule" we follow at BUBS Naturals: we donate 10% of all our profits to veteran-focused charities. In your training, you might think of the "20% Rule"—ensuring that no more than 20% of your total work is high-intensity. This balance between giving your all and respecting the recovery process is the hallmark of a successful athlete.

As you look toward your next marathon, don't be afraid to step out of your comfort zone and hit the track. The discomfort of a speed session is temporary, but the strength and efficiency you gain will carry you through every mile on race day. Stay hydrated, stay consistent, and remember that every scoop of BUBS supports a greater cause.

If you are ready to take your training to the next level, start by mastering your mineral balance. Explore the science-backed ingredients in our performance-focused electrolytes. Shop the Hydration Collection and feel the BUBS difference as you tackle your next interval session with confidence.

FAQ

Is it okay to do two speed workouts in a row?

We generally advise against performing high-intensity speed workouts on consecutive days. Speed work places significant stress on the musculoskeletal system and the central nervous system. Doing two sessions back-to-back increases the risk of injury and overtraining. It is much more effective to place at least one, if not two, easy recovery days or a complete rest day between hard efforts. To support your recovery on those off days, consider adding Collagen Peptides to your morning coffee to help repair connective tissues.

What if I feel too tired to hit my target paces?

Listen to your body. Marathon training is a game of cumulative fatigue, and there will be days when your legs simply don't have the "pop" required for speed work. If you find yourself consistently missing your target paces by more than a few seconds, it is better to cut the workout short and convert it into an easy run. Forcing a mediocre workout can lead to burnout. To help maintain energy and mental focus for your next session, ensure you are starting your day with a clean energy source like our Butter MCT Oil Creamer.

Do I need to do speed work on a track?

While the track is a great tool because of its flat, measured surface, it is certainly not a requirement. You can perform intervals, fartleks, and tempo runs on the road, treadmill, or even a smooth trail. In fact, running speed work on the road can be more "race-specific" since most marathons are run on pavement. Regardless of where you run, staying hydrated is key to performance. Bringing a travel pack of Hydrate or Die – Mixed Berry ensures you have performance-grade electrolytes wherever your training takes you.

Can speed work help me if I'm not a "fast" runner?

Absolutely. Speed work is relative to your own current fitness level. Whether your "fast" is a 6-minute mile or a 12-minute mile, the physiological benefits remain the same. Running at a high relative intensity improves your cardiovascular efficiency and running form, which makes your goal marathon pace feel easier over time. To support your general health and immune function as you introduce this new stress to your body, we recommend a daily dose of Vitamin C to provide antioxidant support.