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Xendurance Announces Extreme Endurance Clinical Study Results



Conducted in 2016 at the University of Louisiana at Lafayette by Dr. David Bellar, Director of the School of Kinesiology and Jason Soileau M.S., CSCS, University of Louisiana at Lafayette The Effects of 10 Days of Extreme Endurance on Performance, Buffering Capacity during Exercise and Post Exercise Muscle Damage, Oxidative Stress and Inflammation is a double-blind, placebo controlled, crossover study with 16 active males that assessed the total effects of Extreme Endurance during exercise. Results: 26% Reduction in Lactic Acid, 39% Reduction in Oxidative Stress and a 6X lowering of CK Levels.

11/02/2016 Press Release below. Full Study Results to be posted online soon.
Xendurance Announces Extreme Endurance Clinical Study Results


The first study on Extreme Endurance is a compelling story.

Extreme Endurance (Xendurance as known in the EU) is the only product in the world that has a Gold-Standard, third party, double-blind, placebo-controlled, crossover study – that has been published. We emphasize third party because it means that we, at Lifespan International, did not know who was testing the product. Many companies pay other companies to “hopefully" get good results – we hired a company to test Extreme Endurance that had no knowledge of
Lifespan International or the product – and the results were off the charts with a 15% reduction in lactic acid and a double digit increase in aerobic threshold.

Jürgen Sessner, the lead researcher on the study and owner of Corpus Diagnostik, located in Hilpotstein, Germany, was so impressed with the results of the 10-day study that he asked if he could do his own study using the active product on 6 of his pro-triathletes for a longer, 30-day study. He found in this second study that with a longer use of Extreme Endurance, there was continued improvement and an increase in VO2 Max and power output. All of his athletes wanted to stay on the product. It is also important to note that before starting Corpus Diagnostik, Jürgen spent 10 years as the head strength and conditioning coach in the First Division German Soccer Bundesliga.

The clinical results of our double-blind study were presented at the 6th Annual European Nutraceutical Convention in Vienna, Austria, March 13, 2010 and are published in the Clinical Journal of the European Society for Clinical Nutrition and Metabolism, (Vol. 5, Supplement 1, 2010).

In September of 2013, Xendurance set out to put Extreme Endurance to the test yet again.

Jürgen Sessner flew out to conduct the test. Jürgen has conducted over 8000 stress tests in his 15-year career. In the open-label test conducted at East Valley Crossfit in Chandler, AZ, 11 cross-functional athletes, ages ranging from 22-66 were randomly selected. All athletes met the minimum criteria of at least 10 months of training leading up to the study and were required to complete 'Fran' twice over the course of a 7-day period. Upon being selected for the study, all of
the athletes took part in a two-week washout period from all supplements. On day one of the study, a baseline 'Fran' test was done and blood samples were taken. Athletes were then provided with a 7-day trial of Extreme Endurance and were instructed to take 3 tablets in the morning and 3 tablets in the evening, with or without food. At both the baseline and post supplementation test, athletes had blood taken from the earlobe immediately before, after, and 10 minutes after completing 'Fran'. All 'Fran' times and movement standards were validated by a judge for each of the participating athletes.

After further analysis, the single best and worst performances were omitted from the study to ensure more accurate results. Of the remaining 9 athletes, a 7-day supplementation of Extreme Endurance yielded an average of 6.2% or a 22-second improvement on their respective 'Fran' times. All blood samples were analyzed by a Hitaldo Super, GL Biosensor System. Blood tests after a 1-week usage of Extreme Endurance reduced lactate levels by 8.9% immediately post
workout and 7.1% 10 minutes post workout when compared to blood samples taken at baseline.