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Man at the gym lifting weights to gain muscle while using a pre-workout supplement

How Does Stimulant-Free Pre-Workout Work?

If you are sensitive to caffeine and other stimulants, you might think pre-workout supplements aren’t an option for you. Luckily, options do exist, and they’re called stimulant-free pre-workout supplements.

But wait, you might be thinking, “Isn’t the whole point of a pre-workout to get you energized and excited about the workout you’re about to tackle?” So, how can a stimulant-free pre-workout possibly work?

Well, science is cool, and it’s actually totally possible to get a nice little energy buzz from a stimulant-free pre-workout. Let’s talk about how they work!



What is a Stimulant-Free Pre-Workout?

Man lifting dumbbell while leaning on wooden bench

A stimulant-free pre-workout is just a pre-workout supplement that doesn’t contain stimulants. Most pre-workouts include caffeine, at the very least. While caffeine and other legal stimulants are proven ingredients that boost energy and sometimes workout performance, there are many reasons a person might not want to use them.

One of the biggest reasons people look for stimulant-free pre-workout supplements is because they’re sensitive to caffeine. Unfortunately, traditional pre-workout supplements aren’t ideal for people with this sensitivity because they cause upset stomach, jitters, or anxiety—sometimes all three.

As with traditional pre-workout supplements, stim-free supplements don’t have a specific formula. Instead, they’re a variety of ingredients designed to give you the same energy boost and workout pump you’d get from your average pre-workout.

How do Stimulant-Free Pre-Workouts Work?

The way a stimulant-free pre-workout works is dependent on the ingredients in the formula. However, in general, stim-free supplements zero in on the pump more than the energy burst.

What is the Pump?

Man getting workout pump

The pump refers to the feeling and condition in the muscles during and shortly after a workout. It works like this: when you lift weights, blood rushes to the muscles, and the blood vessels expand to accommodate it. This visibly increases the size of the muscles, and it feels amazing.

However short-lived the pump may be, it’s actually a sign that your body is doing what it should be doing when you lift weights—rushing nutrients and helping to build and repair muscle fibres.

A non-stimulant pre-workout typically works with the vascular system to achieve the pump instead of the brain and central nervous system. So, while the brain and central nervous system can make you feel energized to lift harder and get a better pump, stim-free supplements cut to the chase.

Below are some of the best ingredients for stimulant-free pre-workouts. Check to make sure your favourite stim-free supp has these, or switch to one of our favourites listed below.

The Best Stimulant-Free Ingredients

The most beneficial ingredients for a stimulant-free pre-workout are those that encourage the body’s natural production of nitric oxide. Nitric oxide is naturally produced by cells in the body. It’s a vasodilator which refers to its relaxing effect on the inner muscles’ blood vessels, which allows the passageways to widen (or dilate) so more blood can flow around the body.

The most effective ingredients to boost natural nitric oxide production, according to science, are the following:

Ingredients set out on table in tiny dishes and spoons

Nitric Oxide Boosters

  • l-citrulline
  • nitrate
  • flavonoids
  • l-arginine

All of these ingredients have various proven health benefits in addition to the boosted nitric oxide.

Benefits of Stimulant-Free Pre-Workout Supplements

If you’re not convinced that stim-free pre-workouts can get the job done for you, take a look at this list of benefits that might have you singing a different tune:

Benefits of Stimulant-Free Pre-Workout

Woman doing yoga pose on purple mat while looking at laptop
  1. No jitters or crash
  2. Better endurance
  3. Better pump, which means better results from your workout
  4. Improved hydration
  5. Reduced cramping
  6. Visibly full muscles
  7. More strength
  8. Better recovery and results

Hopefully, now you understand that stimulant-free pre-workouts can do what traditional pre-workouts do but better, take a look at our best-selling products. 

Best-Selling Stimulant-Free Pre-Workouts

Dilate by ANS Performance

Dilate Pre-Workout ANS Performance Supplement Superstore

ANS Performance is an excellent supplement brand, and this product fits right in. It contains proven ingredients like:

  • l-citrulline
  • glycerol
  • agmatine sulfate
  • pomegranate extract
  • and more

This combination of powerful ingredients is proven to boost nitric oxide production and reduce lactic acid and ammonia build-up in the body.

Full as F*ck by 5% Nutrition

Full As F*ck Pre-Workout 5% Nutrition Nitric Oxide Pump Supplement Superstore

5% Nutrition is a hardcore brand designed for bodybuilders and other serious athletes. This product has a long list of ingredients with proven health benefits, including:

  • vitamin C
  • niacin
  • calcium
  • magnesium
  • sodium
  • potassium
  • l-citrulline
  • l-taurine
  • glycerol
  • and more

We like this product because it includes some of the recommended ingredients to support the pump, and it also includes vital electrolytes to support an intense workout.

High Volume by PEScience

High Volume Pre-Workout PEScience Supplement Superstore

PEScience is known for no-frills products that work. Their stim-free pre-workout is no different. We love this straight-forward product for its ingredients:

  • vitamin C
  • l-citrulline
  • arginine nitrate
  • taurine
  • agmatine sulfate

Again, this is a no-frills product explicitly designed to get you a fantastic nitric oxide pump. It’s formulated with stacking in mind, so you can easily add this to the supplements you’re already taking. 

Purple K Reps by Fusion

This is a unique no-stim pre-workout product because of the addition of creatine. Actually, this is a creatine product with nitric oxide boosting ingredients. Fusion is known for their Purple K “king of creatine” products; it’s a patented kre-alkalyn buffered creatine monohydrate supplement. In addition, Purple K includes:

fusion Purple K Reps Pre-Workout Stim Free Supplement Superstore
  • citrulline malate
  • beta-alanine
  • glycine
  • taurine
  • electrolytes
  • and more

We practically scream from the rooftops that everyone and their mother should be using a creatine supplement. The problem with creatine combination products is that many combination supplements include caffeine. Unfortunately, research shows that combining caffeine and creatine decreases the effectiveness of the creatine.

That’s why Purple K is such an innovative formula—it combines a daily supplement staple (creatine) with a supplement you typically take daily (pre-workout) and doesn’t include any ingredients that can combat the benefits. A win all around!

As you can see, stimulant-free pre-workout products are not only effective, but they might be more successful than traditional pre-workout supplements! This is because instead of giving you the energy to go to the gym and build your own pump, no-stim pre-workouts actually get your pump going for you. In this way, you can have better results without the annoying and potentially harmful side effects of stimulants.

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