Which supplements to take based on your type of training (strength vs. endurance)

This is the question that marks the beginning of any serious nutritional planning in 2026. We are no longer in the era of “trying things to see what happens”; today, science allows us to fine-tune our aim with almost surgical precision, treating our bodies not as simple bags of calories, but as complex systems of metabolic cascades that we can optimize.

Before getting into the details, we have to pass through the safety filter. If you compete or take this seriously, you should know that the WADA Prohibited List for 2026 has brought important changes. For example, the use of carbon monoxide for inhalation has been strictly prohibited, as some people used it to simulate hypoxia and artificially “manufacture” more hemoglobin. Ecdysterone is also being closely monitored, and the use of isolated cellular organelles such as mitochondria or ribosomes is prohibited. Health and clean sport come first.

The Strength, Hypertrophy, and Power Block

When your goal is to move mountains of plates or watch your muscles gain size, your body’s language is that of protein synthesis and the mTORC1 pathway. Creatine monohydrate remains the undisputed king, the “gold standard” that is never missing from any gym bag.

Why is it so effective? Basically, creatine replenishes your phosphocreatine stores, allowing you to get that last squat rep that makes the difference between stagnating and improving. Current data confirms average improvements of around 5.6 kg in the squat and 1.4 kg in the bench press thanks to it. The protocol that works best in 2026 is an initial loading phase of 20 g for one week, followed by a daily maintenance dose of between 3 and 5 g. Interestingly, we now know that it does not only help your muscles; it also improves cognitive processing speed, ideal for maintaining your technique when fatigue sets in.

But the major surprise of the 2024–2025 period has been the battle between collagen and whey. We have always thought that whey protein was the only queen of muscle building because of its rapid absorption. However, recent studies have placed collagen above it statistically in terms of gains in strength and fat-free mass.

Imagine that your muscle is a house: whey protein lays the bricks—the contractile fibers—but collagen reinforces the cement and beams—the extracellular matrix. By improving the structure that supports the fibers, force transfer becomes much more efficient. That is why the smartest “stack” now is to combine 30 g of whey protein with 15 g of collagen after training, taking advantage of the best of both worlds.

Regarding other famous names such as HMB, the Australian Institute of Sport (AIS) keeps it in a secondary position (Group C), since its benefits appear to diminish in highly trained athletes. Phosphatidic acid is emerging with promising benefits for lean mass, but the evidence is still inconsistent for it to be considered a basic pillar.

The Endurance Block: Economy, Energy, and Fatigue

If running, cycling, or any sport in which the stopwatch and fatigue are your worst enemies is your thing, the approach changes completely. Here, we are not trying to “inflate” the muscle, but to make it an efficient machine that consumes little oxygen at the same speed.

Which supplements to take according to your type of training (strength vs. endurance) is key here, because in endurance the main player is nitrate, usually in the form of beetroot juice concentrate. Nitrate improves exercise “economy”; it is as if your car consumed 5 liters per 100 km instead of 7 while traveling the same route. However, the trick lies in the bacteria in your mouth: they are the ones that convert nitrate into nitric oxide, which dilates your blood vessels. Please, if you take beetroot, do not use antiseptic mouthwash afterward—you would eliminate the effect!

Caffeine remains the runner’s most faithful ally. With a solid effect size, it reduces your perception of effort. In other words, you go fast, but your brain feels that the effort is lower. The ideal dose is around 3–6 mg per kilogram of body weight, about 60 minutes before the start.

Another overturned paradigm concerns protein in endurance sports. It was previously thought to be only for “muscleheads,” but today we know that adding protein during endurance training can increase VO2max gains by up to 26.4% compared with training alone. It helps mitigate muscle damage and accelerates recovery for the following day.

And we cannot forget the fuel: carbohydrates. The key in 2026 is using multiple intestinal transporters. If you only consume glucose, the intestine “gets stuck” at around 60 g per hour. But if you use a mixture with fructose—a 1:0.8 or 2:1 ratio—you can absorb up to 90–120 g per hour without stomach problems. Combined with a good dose of sodium, this ensures that the engine does not stop.

High-Intensity Intermittent Training: The Realm of Buffers

For CrossFit enthusiasts or team-sport athletes such as soccer or rugby players, the battle is against muscle acidity. Beta-alanine is essential here. It is not a supplement with an immediate effect; you must take it for weeks to load carnosine into your muscles, where it acts like a sponge, absorbing the hydrogen protons that cause burning and fatigue.

The magic happens when we combine it with sodium bicarbonate. While Beta-alanine clears the disorder inside the cell, bicarbonate does so outside it, in the blood. This “alkaline synergy” spectacularly improves performance in repeated sprints. However, traditional bicarbonate used to cause urgent trips to the bathroom; fortunately, in 2026 we have enteric-coated capsules that release the compound after the stomach, mitigating almost all discomfort.

Synergies and the Gut-Brain Axis: Systemic Health

A modern science communicator cannot talk only about muscles. The current frontier is the health of our microbiota. Intense exercise stresses the gut, but supplements such as creatine have been shown to reduce the risk of constipation and protect the intestinal mucosa.

In addition, psychobiotics such as Lactobacillus kefiranofaciens K6 are revolutionizing recovery. They not only reduce markers of muscle damage after a punishing workout, but also help mitigate the anxiety and central fatigue caused by overtraining or lack of sleep. Because having the best supplement is useless if your brain and gut are “out of service.”

As for antioxidants, the ISSN’s official position changed in 2026. It is no longer recommended to take massive doses of Vitamin C and E during loading phases, because we need that oxidative “stress” for the body to learn to adapt and become stronger. Antioxidants are now reserved for periods of intense competition, when rapid recovery takes priority over long-term adaptation.

Conclusion and Final Strategy

Understanding which supplements to take according to your type of training (strength vs. endurance) ultimately comes down to hierarchy and common sense. For strength, prioritize creatine and a good protein blend. For endurance, focus on carbohydrates, caffeine, and, optionally, nitrates. For high-intensity training, rely on Beta-alanine and bicarbonate.

Remember that no magic tub can replace a solid diet, restorative rest, and well-programmed training. Supplements are the icing on the cake, not the cake itself. But if you have the foundations in place, choosing the right supplements according to your type of training (strength vs. endurance) can be the final push toward achieving your best self this year.

Bibliographic Sources and Meta-Analyses

• AIS (Australian Institute of Sport): Supplement Framework Overview 2026. Classification of supplements according to scientific evidence (Groups A, B, C, and D).

• ISSN (International Society of Sports Nutrition): Position Stand 2026: Dietary Antioxidants on Exercise and Sports Performance. Review of the impact of vitamins C, E, and polyphenols on muscular adaptation.

• WADA (World Anti-Doping Agency): The 2026 Prohibited List and Monitoring Program. Update on prohibited and monitored substances, including caffeine and ecdysterone.

• 2024–2025 Network Meta-Analysis (NMA): Which Protein-Based Dietary Supplements Most Effectively Enhance Fat-Free Mass and Strength Gains? Published on PubMed/PMC, comparing the effectiveness of whey, collagen, and plant proteins.

• 2025 Umbrella Review: Dietary Nitrate Supplementation and Performance. High-level review of beetroot juice and its effect on time to exhaustion and peak power.

• Examine.com (2025 Edition): Beta-alanine and Creatine Dosage Guides, including cognitive benefits and effects on the intestinal mucosa.

• Clinical Study (2025): Lactobacillus kefiranofaciens K6 and exercise-induced damage. Published in the International Journal of Medical Sciences, analyzing the gut-brain axis.