The Science of Sport • Pre-Workout
Why Bodybuilding Pre-Workouts Don't Cut It for Real Sport
The tingles, the buzz and the pump feel like performance. But if you run, race HYROX, do CrossFit, swim, play football or train for triathlon, the standard tub is built for a different job.
What a typical pre-workout is built to do
Most mainstream pre-workouts were designed around the gym floor: lifting for an hour or so, chasing a big pump, feeling switched on. The formula usually leans on a few levers:
- A large hit of caffeine, often combined with other stimulants.
- A strong tingle from high-dose beta-alanine.
- Vasodilators aimed at a muscle "pump".
- Flavour systems built on artificial sweeteners, colours and sometimes sugar alcohols.
That can feel great for 45 minutes of bench press. A 10 km run, a 90-minute football match, a 1.9 km swim or a HYROX race asks very different things of your body.
Problem one: borrowed energy
A stimulant doesn't create energy. It changes how tired you feel. Caffeine works largely by blocking adenosine, the chemical that builds up and signals fatigue. The fatigue is still there, you just don't feel it as much for a while.
That's why so many athletes describe the same pattern: a big lift-off, then a flat patch, then a need for more. Caffeine also hangs around. Its half-life is commonly cited at around five hours, though it varies widely between people, so an afternoon scoop can still be in your system at bedtime. Poorer sleep means poorer recovery, which means a flatter session tomorrow, which means reaching for the scoop again. That's the borrowing: you take the feeling of energy today and pay for it with sleep, recovery and tolerance later.
Tolerance is the other cost. The more often you use stimulants, the more you need to feel the same effect, and the higher the dose creeps.
Problem two: too much vasodilation
Vasodilation means widening blood vessels. It's a normal, useful response, and ingredients that support nitric oxide, like citrulline, are popular for good reason. More blood flow to working muscle can help deliver oxygen and nutrients.
But more isn't automatically better, and the "pump" is a gym metric. A pump is blood and fluid in the muscle. It doesn't make you run a faster kilometre.
- Endurance and heat. When you're running or racing in warm conditions, your body is already sending blood to the skin to cool you and to muscle to work. Adding aggressive extra vasodilation on top can leave some people feeling flushed, light-headed or headachy.
- Blood has to go somewhere. Your gut also needs blood to digest and absorb. When flow is already pulled to muscle and skin, the gut is the system that loses out.
- Stacked doses. Many tubs combine several vasodilating ingredients with stimulants. People who are sensitive may feel pounding in the head, a racing heart or dizziness, particularly in the first sessions.
The goal for sport is steady, well-supported blood flow across the whole session, not the biggest possible rush at minute five.
Problem three: nobody is looking after the gut
During hard exercise, blood is redirected away from the digestive system toward working muscle. Gut symptoms like cramping, bloating, nausea and urgent toilet stops are common in runners, triathletes and hybrid athletes, and they are a classic way to ruin a race.
Most standard pre-workouts do nothing to support the gut, and some add to the load through artificial sweeteners, sugar alcohols or concentrated, high-osmolality ingredients that can draw water into the gut. Few include anything for the gut lining at all.
Problem four: there's no actual fuel
"Energy" on a pre-workout label usually means stimulation. There are often few or no carbohydrates and little in the way of electrolytes. For a session longer than an hour, the real energy is carbohydrate, and the thing that keeps you moving is fluid and sodium. A scoop that makes your heart race isn't going to get you through the back half of a half marathon.
How it plays out across different sports
| Sport | What the session needs | Where a standard tub falls short |
|---|---|---|
| Running | Steady fuel, a calm gut, fluid and sodium | Stimulant jitters, gut upset, no carbs or electrolytes |
| HYROX | Running plus strength stations for over an hour | Fades after the first hour, with nothing to carry the back half |
| CrossFit | Repeated high-intensity efforts, recovery between sessions | Hard to recover when sleep is hit; high heart rate from stimulants |
| Triathlon | Hours of fuelling, hydration and gut tolerance | No fuel, no sodium, and a gut that has to cope |
| Football | Repeated sprints and clear decisions for 90 minutes | Jittery start, flat finish, and fluid and sodium not covered |
| Swimming | Smooth breathing and rhythm, early starts | A racing heart works against a calm stroke, and early sessions mean late-day caffeine hurts sleep |
The sport-first alternative: Athletic Energy and Sonic Energy
PHYBA built these two to do the opposite of the standard approach. One looks after the body before the session, the other fuels it during the session. Neither relies on stimulants.
Athletic Energy: the stimulant-free pre-workout
Instead of masking tiredness, it supports the systems that produce performance.
- Blood flow, supported rather than forced. Citrulline malate and pomegranate polyphenols support the nitric oxide pathway, for blood flow and oxygen delivery.
- Gut support. Tributyrin is a butyrate source, the preferred fuel for cells lining the colon, and is included to support the gut lining under training stress.
- Cellular energy. Vitamins B2 and B3 support mitochondrial energy production, and schisandra supports aerobic efficiency and stress resilience.
- Recovery. Black cherry anthocyanins are included to help with muscle soreness after hard sessions.
- Longer-term health. Polyphenols and fulvic minerals provide antioxidant support against the oxidative stress of training.
Sonic Energy: caffeine-free fuel and electrolytes
This is the real energy: carbohydrate, sodium and fluid.
- Cluster Dextrin®, a highly branched cyclic dextrin with low osmolality (around 12 mOsm/kg). It's designed to leave the stomach quickly and be easy on the gut.
- A full electrolyte profile with sodium, potassium, calcium and magnesium, to replace what you lose in sweat.
- 2 g of creatine monohydrate to support high-intensity work.
- No high-fructose loads and no artificial additives that commonly trigger gut symptoms during exercise.
| Typical bodybuilding pre-workout | Athletic Energy + Sonic Energy | |
|---|---|---|
| Source of “energy” | Stimulants that mask fatigue | Carbohydrate, electrolytes and cellular support |
| Blood flow | Often stacked for a big pump | Supported through citrulline and pomegranate polyphenols |
| Gut | Rarely considered | Tributyrin plus a low-osmolality carb |
| Sleep and recovery | Can cut into both | Stimulant-free, so training any time of day |
| Long-term view | Short-term feeling | Built around training consistency and health |
How to use them together
- Before: mix one serve of Athletic Energy 20 to 40 minutes before training.
- During: sip Sonic Energy through longer or harder sessions for carbohydrate, fluid and electrolytes.
- Around it: consider Gut Guardian for daily gut support and Phyto-Fusion for recovery protein.
- Trial anything new in training first, never on race day.
The takeaway
If you lift for a pump, a standard pre-workout may be fine for you. If you run, race, swim, play or train across the week and want to still be training well in five years, look for something that supports blood flow, fuels the work and looks after the gut, rather than something that borrows from tomorrow. That's what Athletic Energy and Sonic Energy were made to do.
This article is for educational and informational purposes only and is general in nature. These statements have not been evaluated by the TGA. Supplements are foods / complementary medicines and are not intended to diagnose, treat, cure or prevent any disease. Individual results vary. If you have a medical or heart condition, are pregnant or take medication, speak with your health professional before using any pre-workout or supplement. Always read the label.
