Pre-Workout: The Complete Guide
Pre-workout supplements work through three mechanisms — stimulants for focus and energy, vasodilators for pump and blood flow, and performance ingredients for endurance and strength output. Here's what each one does, what dose actually works, and what's filler.
The four ingredients that matter
Caffeine — 3–6 mg/kg bodyweight
The most-studied ergogenic aid in sports. At 3–6 mg/kg (roughly 200–400 mg for most adults), caffeine reliably improves endurance, strength, power output, and perceived exertion.1 Effects kick in 30–45 minutes after intake. Tolerance builds quickly — cycle off periodically. Our IGNITE (Fruit Punch, Watermelon, Tropical Sunrise) and ENERGY (Lemonade) lines use clinical caffeine doses.
L-Citrulline or Citrulline Malate — 6–8 g
Raises arginine levels better than arginine itself — improves nitric oxide, blood flow, and muscle pumps. Most research uses 6–8 g doses; anything less is likely sub-therapeutic. If your label shows "proprietary blend" with citrulline buried inside, you probably aren't getting enough.
Beta-Alanine — 3.2–6.4 g daily
Increases muscle carnosine levels, buffering acid buildup during high-rep or interval work. Most effective in the 1–4 minute effort window — cross-fit, sprints, 5x10 squats. Causes the harmless tingling sensation (paresthesia). Effects are cumulative; you need it daily for 2–4 weeks to see benefits.
Creatine Monohydrate — 3–5 g
Creatine in a pre-workout is a bonus, not a requirement — it's cumulative and works whenever you take it. If your pre-workout doesn't include it, supplement separately. See our complete creatine guide.
What's probably filler?
- BCAAs in pre-workout: if you're already eating adequate protein daily, adding BCAAs pre-workout won't move the needle. See our recovery guide.
- Agmatine sulfate, AAKG, "NO boosters" not named citrulline: weak evidence. Citrulline is the one that works.
- Proprietary blends: if the label hides individual ingredient doses behind a "blend," be skeptical. Reputable brands disclose each ingredient's dose.
- "Mega-dose" caffeine (400+ mg) in one scoop: more isn't better. Effects plateau; side effects (anxiety, tremor, insomnia, crash) escalate.
Stim vs Non-Stim
Some lifters train late, have high caffeine sensitivity, or want to avoid habituation. Non-stim pre-workouts skip the caffeine and lean on citrulline, beta-alanine, betaine, and nitrate sources (beetroot, arugula extract). Effects are subtler but real — especially for pump-focused sessions.
SaltyFuelShop options:
- Stimulant pre-workouts: IGNITE, ENERGY, and PUMP (Citrus Blast, Georgia Peach, Blast-Off, Grape Annihilation with creatine)
- Non-stim pump formulas: PUMP (Cherry Blast, Pineapple)
How to dose pre-workout safely
- Take 30–45 minutes before training (not 5 minutes — absorption takes time).
- Start with a half-scoop if it's your first time. Build tolerance gradually.
- Don't stack multiple stimulant sources (pre-workout + coffee + energy drink = overshoot).
- Cut caffeine by 6 hours before bed. Half-life is 5–6 hours for most adults.
- Cycle off stimulants periodically (1–2 weeks every 8–12 weeks) to reset tolerance.
Pre-Workout FAQ
Can I take pre-workout every day?
You can, but tolerance builds. Most users benefit from cycling off periodically or using non-stim formulas on lower-intensity days.
What if I'm sensitive to caffeine?
Try a non-stim formula (our PUMP Non-Stim line), split the dose, or look for products with lower caffeine (around 100–150 mg per scoop).
Does pre-workout work for cardio?
Yes. Caffeine and beta-alanine both improve endurance performance. Skip the high-pump ingredients if you're running long and just want the stimulant effect.
Can I mix pre-workout with coffee?
Technically yes, but check your total caffeine — it's easy to hit 500+ mg, which pushes most people into jittery/crash territory. Swap one for the other.
Related reading
References
- Grgic J, Grgic I, Pickering C, et al. Wake up and smell the coffee: caffeine supplementation and exercise performance — an umbrella review of 21 published meta-analyses. British Journal of Sports Medicine. 2020;54(11):681-688. PubMed: 30926628
This guide is for educational purposes and is not medical advice. If you have a heart condition, anxiety disorder, or take medications, consult your physician before using stimulant-based pre-workout supplements.