Endurance pro

Endurance Pro is not just another food supplement. It is sports nutrition backed by hard data and developed in cooperation with athletes themselves.

Dual carbohydrate source of glucose and fructose in a 2:1 ratio

The combination of glucose and fructose in a 2:1 ratio maximises carbohydrate absorption and increases energy utilisation by up to 50 % compared with glucose alone. At the same time, this ratio minimises digestive problems. It is the ideal choice for an intake of 60–90 g of carbohydrates per hour during an endurance effort lasting longer than 2 hours or during repeated high-intensity efforts such as a half marathon, marathon, triathlon or cycling

What the studies say: Research (e.g. Jentjens et al., 2004) has shown that a mixture of glucose and fructose increases the rate at which the supplied carbohydrates are burned by a massive 75 % (up to 1.75 g/min) compared with glucose administered alone. Subsequent performance studies (Currell and Jeukendrup, 2008) further confirmed that this combination not only reduces the subjective rating of perceived exertion (RPE), but leads to significantly better times in endurance time trials in a direct comparison with the same amount of isolated glucose.

L-Citrulline

Supplementation with L-citrulline is the most effective route to increasing the plasma level of L-arginine, and it does so more effectively than administering arginine alone. The increased availability of arginine stimulates the enzyme endothelial nitric oxide synthase (eNOS) to produce nitric oxide (NO) on a massive scale. NO acts as a strong vasodilator – it widens the blood vessels, which maximises microcirculation and the delivery of oxygen to the working muscles, while genuinely reducing the oxygen cost of muscle contraction. At the same time, citrulline suppresses hyperammonaemia (an excessive build-up of ammonia that hampers energy metabolism). Ideally, supplement L-citrulline at a dose of 3.4–6 g per day for at least 6–16 days before the effort, which according to the data brings a significant improvement in endurance capacity

What the studies say: An extensive meta-analysis of ten independent studies (Viribay et al., 2022) showed that taking 3.4 to 6.0 g of citrulline per day clearly leads to improved aerobic performance compared with placebo. Further studies in trained cyclists recorded improved times and a lower perception of muscle fatigue in high-intensity tests after supplementation with 6 g of citrulline. In endurance sports, even a small percentage improvement means a world of difference in the finishing straight.

Caffeine

Caffeine blocks fatigue receptors in the brain and directly stimulates muscle contraction. Endurance Pro does not contain it only for focus, however, but also for the so-called additive effect, where the ingredients work better together than on their own.

What the studies say: Meta-analyses (Christensen et al., 2017) consistently show that caffeine on its own brings an average improvement of 1 % in high-intensity efforts compared with placebo, which at elite level decides races. The most important finding, however, came from the study by Yeo et al. (2005), which found that taking caffeine and carbohydrates together increases the rate at which these carbohydrates are burned by a further 26 %. This advantage was subsequently confirmed by the meta-analysis by Conger et al. (2011), with the conclusion that the combination of caffeine and carbohydrates provides a small, but demonstrably greater and statistically significant performance bonus compared with merely supplementing with carbohydrates.