Antrenman öncesi ve antrenman sırası: hangisi işe yarar ve ne zaman içilir

As a sports nutritionist who has worked with athletes for over 12 years, I've seen all sorts of supplementation trends come and go. However, one topic remains eternally relevant and often confusing for many trainees: the battle, or rather the synergy, between pre-workout and intra-workout products. On the shelves, you'll see hundreds of colorful boxes, each promising unprecedented power, inhuman pumps, and endless endurance. The truth, as always, lies somewhere in the middle and depends entirely on the context of your goals, training, and nutrition.

Every day in my practice, I answer questions like: "Do I need an intra-workout if I'm already taking a pre-workout?", "Which is more important?", "Isn't it all just marketing?". Honestly, the confusion is completely understandable. Marketing often presents these two categories as interchangeable or mandatory for anyone who steps into the gym. This is simply not true.

The purpose of this article is to put an end to speculation. We will dissect the composition, function, and most importantly – the practical application of both types of supplements. I will give you precise numbers, dosages, and scenarios based on science and my many years of experience with hundreds of strength and endurance athletes in Bulgaria. By the end, you will know exactly what, when, and why to drink (or not drink) to get the most out of every workout.

What is Pre-Workout and When is it Effective?

A pre-workout product is a formula designed to be taken 30-45 minutes before physical exertion. Its main goal is to influence the central nervous system (CNS) and certain metabolic pathways to increase immediate performance. Simply put, it "ignites" you for the workout.

The effects we seek and (if the product is quality) receive are several:

• Increased energy and reduced fatigue: This is mainly the work of stimulants like caffeine. The feeling of fatigue decreases, and the motivation for hard work increases.
• Improved focus and concentration: The ability to concentrate on each repetition and maintain good technique is key. Ingredients like caffeine and L-tyrosine play an important role here.
• Increased strength and power: Some ingredients directly support energy production (ATP) or buffer waste products, allowing you to lift a little heavier or do 1-2 more reps.
• Better pump (vasodilation): Increased blood flow to the working muscles is not just for the mirror. It means better delivery of oxygen and nutrients, as well as more efficient removal of metabolites.

A well-formulated pre-workout is an extremely effective tool for workouts lasting up to about 60-75 minutes. For a standard strength training session in the gym, it is often completely sufficient, especially if you have eaten 2-3 hours prior and your glycogen stores are full.

Breakdown of Key Pre-Workout Ingredients (with Dosages)

Not all pre-workout products are created equal. Their effectiveness depends on what they contain and, most importantly, in what doses. Here are my #1 choices for ingredients with solid scientific backing:

1. Caffeine Anhydrous: The king of stimulants. It blocks adenosine receptors in the brain, reducing the feeling of fatigue. It has been proven to improve strength, endurance, and sprint performance.
   • Effective dose: 3-6 mg per kilogram of body weight. For an 80 kg athlete, this is between 240 mg and 480 mg. I recommend starting at the lower end.
2. Citrulline Malate: My favorite for pump and endurance. In the body, it converts to arginine, which increases nitric oxide (NO) production. This dilates blood vessels (vasodilation). The result is more blood, oxygen, and nutrients to the muscles.
   • Effective dose: 6-8 grams. Be careful, many products contain only 1-2 grams, which is extremely insufficient for an ergogenic effect. The citrulline to malate ratio is usually 2:1.
3. Beta-Alanine: This amino acid binds with histidine to form carnosine in the muscles. Carnosine is a powerful buffer of hydrogen ions (H+), which accumulate during intense exercise and lead to "burning" and fatigue. It allows you to work longer at high intensity.
   • Effective dose: 3.2-6.4 grams per day. Keep in mind that beta-alanine works through accumulation. It needs to be taken every day (even on rest days) to saturate the muscles. The harmless tingling sensation (paresthesia) is a normal side effect.
4. Creatine Monohydrate: The most researched supplement for strength and muscle mass. It increases phosphocreatine stores, which rapidly regenerate ATP (the cell's primary energy currency). It is often added to pre-workout formulas for convenience.
   • Effective dose: 3-5 grams daily. Similar to beta-alanine, creatine requires saturation and daily use for maximum effect, not just before training.

What is Intra-Workout and Who is it For?

Intra-workout supplements are designed to be consumed during the workout itself. Their role is fundamentally different from that of pre-workout products. They do not aim for neurological stimulation, but for metabolic support. Their main task is to provide readily available energy, preserve muscle mass (anti-catabolism), and maintain hydration during long and exhausting efforts.

When does an intra-workout become not just useful, but almost mandatory? In my practice, I see several clear scenarios:

• Workouts lasting over 75-90 minutes: After this threshold, muscle glycogen (stored carbohydrates) begins to deplete significantly. Providing external carbohydrates can drastically extend the time until fatigue.
• Fasted Training: If you train in the morning before your first meal, the risk of muscle breakdown (catabolism) is higher. Consuming essential amino acids (EAA) can provide an anti-catabolic shield.
• Two-a-day workouts: Athletes who train twice a day need to maximize recovery between sessions. Consuming carbohydrates and amino acids during the first workout kickstarts glycogen and protein resynthesis much earlier.
• Very high volume workouts: Bodybuilders in pre-competition prep or CrossFit athletes performing long and heavy complexes benefit greatly from maintaining energy levels and limiting muscle damage.

For a 45-minute chest and biceps workout, where you ate well beforehand? An intra-workout is completely unnecessary. It's just extra calories and money down the drain.

Key Components in Intra-Workout Formulas

An effective intra-workout revolves around three main pillars:

1. Fast-acting carbohydrates: This is the fuel. The goal is to use a carbohydrate that is quickly absorbed without causing stomach discomfort. My #1 choice is Cyclic Dextrin (HBCD, Cluster Dextrin®) due to its low osmolarity and rapid passage through the stomach. Other good options include maltodextrin and dextrose, although at higher concentrations they can cause bloating.
   • Effective dose: 30-60 grams per hour of training. For elite endurance athletes, the dose can reach up to 90 g/hour, often in a combination of glucose and fructose (2:1 ratio) for maximum absorption.
2. Essential Amino Acids (EAA): This is the protection. While we train, muscle protein synthesis decreases, and breakdown increases. Providing EAA, especially leucine, sends a strong anabolic (or more accurately, anti-catabolic) signal that protects muscle tissue. Why EAA and not just BCAA? Because all 9 essential amino acids are needed for protein synthesis, not just 3.
   • Effective dose: 8-15 grams during the workout. Look for products with at least 3 grams of leucine per serving.
3. Electrolytes: This is hydration. When we sweat, we lose not only water but also key minerals like sodium, potassium, and magnesium. They are vital for muscle contractions and nerve function. Their deficiency leads to cramps and performance decline.
   • Effective dose: Varies greatly depending on sweating, but a good start is 300-500 mg of sodium and 150-300 mg of potassium per hour of intense training.

Pre-workout vs. Intra-Workout: Direct Comparison

Let's now illustrate when each product is the more suitable choice. In many cases, it's not about "either-or," but about "when to add the second."

Criterion	Pre-Workout	Intra-Workout
Main Goal	Neurological stimulation, strength, focus	Metabolic support, endurance, anti-catabolism
Timing of Intake	30-45 minutes before workout	During workout (in sips)
Key Ingredients	Caffeine, Citrulline, Beta-Alanine	Carbohydrates (Cyclic Dextrin), EAA, Electrolytes
Ideal for workouts...	up to 75 minutes (strength, HIIT)	over 90 minutes (endurance, high volume)
When is it unnecessary?	Late evening, with sensitivity to stimulants, light workouts	Short workouts (<75 min) on a full stomach

When it DOESN'T Work / Common Mistakes

As with any tool, improper use can lead to zero or even negative results. Here are a few scenarios I see constantly:

• Mistake #1: Relying on pre-workout to compensate for a poor lifestyle. If you sleep 5 hours a night and eat poorly, no pre-workout will save you. It can mask fatigue for one workout, but in the long run, it's a recipe for overtraining and burnout. First, fix the basics: sleep, nutrition, and stress management.
• Mistake #2: Overdoing calories from intra-workout. I've seen people on a weight loss diet drink a beverage with 80 grams of sugar during a 60-minute workout. That's 320 calories that completely sabotage their calorie deficit. If the goal is fat burning and the workout is short, stick to water or possibly calorie-free EAA/electrolytes.
• Mistake #3: Late intake of stimulants. Taking a pre-workout with 250-300 mg of caffeine at 7:00 PM for a workout at 8:00 PM is a guarantee of disrupted sleep. Caffeine has a half-life of about 5-6 hours, meaning by midnight you'll still have a significant amount of stimulant in your system. This disrupts the deep sleep phases, which are critical for recovery. For late workouts, choose a stim-free pre-workout.

Messy Human Detail: The Stomach on the Front Lines

I want to be completely honest about a side effect that is rarely discussed in marketing materials: digestive discomfort. Both types of products can be problematic if not approached carefully. With pre-workout formulas, the culprits are often high doses of magnesium stearate, some artificial sweeteners (like sucralose), or an overdose of beta-alanine on an empty stomach, which can cause bloating, gas, or an urgent need for the toilet. With intra-workout drinks, especially those with dextrose or maltodextrin, the problem is osmotic. If the solution is too concentrated or you drink it too quickly, the body will draw water into the small intestine to dilute it, leading to cramps and potential diarrhea. My advice: always test a new product with half a dose and drink your intra-workout beverage in small, even sips throughout the workout, not all at once.

📚 Scientific Sources

• Guest, N.S., VanDusseldorp, T.A., Nelson, M.T. et al. International society of sports nutrition position stand: caffeine and exercise performance. J Int Soc Sports Nutr 18, 1 (2021). https://doi.org/10.1186/s12970-020-00383-4
• Kerksick, C.M., Arent, S., Schoenfeld, B.J. et al. International society of sports nutrition position stand: nutrient timing. J Int Soc Sports Nutr 14, 33 (2017). https://doi.org/10.1186/s12970-017-0189-4
• Pérez-Guisado, J., & Jakeman, P. M. (2010). Citrulline malate enhances athletic anaerobic performance and relieves muscle soreness. The Journal of Strength & Conditioning Research, 24(5), 1215-1222. https://pubmed.ncbi.nlm.nih.gov/20386132/