The Why and How of Stacking Pre-Workout Supplements

The Why and How of Stacking Pre-Workout Supplements

When it comes to achieving your fitness goals, you're constantly seeking that extra edge to push your limits and unlock your true potential. Enter the world of pre-workout supplements – designed to give you the energy, focus, and endurance needed to crush your workouts. But have you ever considered combining the power of both stimulant and stimulant-free pre-workout supplements? In this comprehensive guide, we will delve into the science behind stacking these two types of supplements to maximize your performance and gains.


Understanding Stimulant and Stimulant-Free Pre-Workouts:

Before diving into the benefits of stacking stimulant and stimulant-free pre-workout supplements, let's first understand what each type entails.


Stimulant Pre-Workout Supplements:

Stimulant-based pre-workouts are formulated with ingredients like caffeine and other energy-boosting compounds (such as the Zum-XR® in Core FURY V2) to increase your energy and motivation while at the gym. These ingredients have a wide range of known benefits including improving exercise performance, information processing, alertness and mood enhancement, attention, and awareness, along with its anti-lipogenic and lipolytic abilities. All these benefits will help you power through intense workouts and conquer fatigue, which is one of the reason a majority of the most popular and best-selling pre-workout supplements are contain at least some stimulants.


Stimulant-Free Pre-Workout Supplements:

Stimulant-free pre-workouts are designed to provide similar benefits to their stimulant counterparts, but without the use of caffeine or other stimulants. Instead, they rely on ingredients like nitric oxide boosters such as the N03T® Nitrate within Core PUMP, amino acids like L-Citrulline and Beta-Alanine, and natural extracts such as PeakO2® (a combination of six Ayurvedic mushroom strains) or PEAK ATP® (a key ingredient in Core PEAK that provides a readily available form of ATP that potentiates the role of ATP in the human body). All of these ingredients have significant benefits to athletic performance while at the gym, including improved the mind-muscle connection, increased blood flow, time to fatigue, VO2 max, max power output and athletic performance, muscle “pumps”, and endurance, all while avoiding the jitters and crashes associated with stimulants.


The Synergy of Stacking:

Now, let's explore the reasons why stacking stimulant and stimulant-free pre-workout supplements can elevate your training experience to the next level.

  1. Enhanced Energy and Focus: Combining a stimulant-based pre-workout with a stimulant-free counterpart can lead to an optimal balance of energy and focus. While stimulants provide an immediate kick, stimulant-free ingredients like citrulline malate and beta-alanine work in synergy to improve endurance and delay fatigue. This dynamic duo keeps you sharp and motivated throughout your entire workout, eliminating the risk of energy crashes. This also reduces your overall caffeine intake without missing out on the benefits of a full dose of pre-workout or the energy enhancing effects of caffeine and other stimulants.

  2. Enhanced Performance: By selecting supplements with complementary, but different ingredients, you can experience a well-rounded boost in physical and mental performance. For example, combining caffeine for energy, creatine for strength, and citrulline for improved blood flow can lead to better overall workout results.

  3. Personalized Customization: Stacking pre-workout supplements allows you to tailor your pre-workout regimen to your specific fitness goals and needs. You can choose supplements that address areas like energy boost, muscle pump, mental focus, and recovery, creating a personalized approach to your workout routine.

  4. Synergistic Effect: Similar to the first point, combining different pre-workout supplements can create a synergistic effect, where the individual benefits of each supplement are amplified when taken together. This can lead to improved energy, focus, and endurance during your workout.

  5. Prolonged Endurance and Muscle Pump: Stimulant-free pre-workout supplements often contain ingredients that support vasodilation, increased blood flow, enhance endurance, delay fatigue, and improve oxygen utilization. When paired with stimulant pre-workouts, which enhance mental stamina, you can experience longer-lasting workouts with improved muscle pumps. Ingredients like L-citrulline and beetroot extract promote nitric oxide production, leading to better oxygen and nutrient delivery to your muscles.

  6. Adaptation Prevention: Regular use of a single pre-workout supplement might lead to a diminished response over time as your body adapts. Stacking different supplements with varying mechanisms of action can help prevent this adaptation, ensuring consistent effectiveness over the long term.

  7. Minimized Tolerance Buildup: Over time, your body can develop a tolerance to stimulants, leading to diminished effects. By stacking stimulant and stimulant-free supplements, you can reduce the risk of tolerance buildup. By alternating between the two types, you give your body a break from constant stimulant exposure, ensuring that both your mind and body respond optimally to their benefits.

  8. Well-Rounded Nutrient Delivery: Stimulant-free pre-workout supplements often contain essential amino acids and other nutrients that contribute to muscle recovery and growth. Pairing these nutrients with the immediate energy boost from stimulant pre-workouts creates an environment where you're not only primed for a great workout but also set up for effective post-workout recovery.

  9. Adjust to Various Training Phases: Your training routine might include different phases, such as strength-focused periods or high-intensity interval training (HIIT). Stacking stimulant and stimulant-free pre-workouts enables you to tailor your supplement regimen to match your training goals. During strength phases, you might prefer a higher-stimulant content for extra power, while stimulant-free ingredients shine during endurance-focused workouts.

  10. Flavor Stacking: While this might be unique to our Fun Sweets flavor collaboration, combining pre-workouts can produce some unique flavors that aren't available otherwise. In this case, combining Cherry Berry and Blue Raspberry, in either Core PUMP or FURY V2, produces the flavor of a mixed bag of pink and blue cotton candy.  


Choosing the Right Stack

While the benefits of stacking stimulant and stimulant-free pre-workout supplements are clear, it's crucial to choose the right products that complement each other seamlessly. Here's a step-by-step guide to creating the perfect stack for your needs:

  1. Identify Your Goals: Understand your fitness objectives – whether it's building muscle, increasing endurance, or shedding fat. This will help you choose the right balance between stimulant and stimulant-free ingredients

  2. Read Labels and Ingredient Lists: Thoroughly examine the labels and ingredient lists of both pre-workout supplements. Look for clinically effective doses of key ingredients like caffeine, citrulline, beta-alanine, and amino acids. Ensure there's no redundancy between the two products.

  3. Check Dosage Instructions: Follow the recommended dosage instructions for both supplements. Pay attention to the timing – some stimulant pre-workouts should be taken 20-30 minutes before exercise, while stimulant-free versions might benefit from a slightly earlier intake

  4. Start Slowly: If you're new to stacking, start with lower doses of each supplement to assess your body's response. Gradually increase the dosage as needed, keeping an eye on how you feel during and after workouts.

  5. Listen to Your Body: Every individual is unique, and your body's response to the stack may vary. Pay attention to any discomfort, jitters, or sleep disturbances. Adjust the dosage or timing accordingly to find your optimal balance.

  6. Stay Hydrated: Both stimulant and stimulant-free pre-workout supplements can contribute to dehydration due to increased energy expenditure. Make sure to stay adequately hydrated before, during, and after your workout to optimize performance and recovery.



In the pursuit of a sculpted physique and peak performance, maximizing your efforts is key. Stacking stimulant and stimulant-free pre-workout supplements offers a strategic approach to achieving your fitness goals. By harnessing the energy and focus of stimulants and combining them with the endurance-enhancing properties of stimulant-free ingredients, you create a well-rounded supplement regimen that supports both short-term performance and long-term gains.

Remember, individual responses may vary, so finding your ideal stack requires some experimentation. Always prioritize safety and quality by choosing reputable brands like Core Nutritionals that provide transparent ingredient lists and clinically effective doses.

Elevate your training sessions, conquer plateaus, and unlock your full potential with the powerful synergy of stacked pre-workout supplements. Whether you're striving for bigger lifts, longer runs, or more intense workouts, the combination of stimulant and stimulant-free supplements is your secret weapon to pushing boundaries and achieving the results you desire.


Click the links below to grab some of our stim and stim-free pre-workouts today:

Stimulant-based Pre-workout Supplements:

Stimulant-free Pre-workout Supplements:



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