Xendurance is a sports nutrition company that was started in the USA in 2006 when the formula, Xendurance (Extreme Endurance in the USA) was under development. The parent company, Lifespan International US., is located in Carefree, Arizona. Lifespan’s goal was to develop an all-natural, drug-free product, which would improve an athlete’s performance by improving both aerobic and lactate acid threshold. Xendurance also wanted to develop a formula that would safely reduce the “culprit” known as lactic acid.
Lifespan International recognised that athletes not only benefit from performance products but they also need to protect their health and immune systems from the trauma of rigorous training schedules. With that in mind, Lifespan continuously expands the Xendurance product line of power-packed multi-vitamins, omega and joint formulas, protein and electrolyte drinks, with unique formulas backed by science.
What distinguishes Xendurance from other sports nutrition companies is that the company showcase product, Xendurance, has a published, Gold-Standard, third party, double-blind, placebo-controlled, crossover study backing up claims of 15% reduction in lactic acid and a double digit increase in aerobic threshold. Many companies make substantial claims on individual ingredients, but Xendurance has a published study on the complete formula, not just the ingredients.“Third party” testing is also important because it means that Lifespan International did not know or hire the actual facility that did the testing therefore no bias was influencing the outcome of the study.
Xendurance was the first sports nutrition product made in the USA, to be certified drug-free by HFL; INFORMED CHOICE & INFORMED SPORT, the world renown, sports doping laboratory.
Xendurance continues to provide research and studies that prove their products.
An open label study on 11 cross-functional athletes was conducted using Xendurance with results showing an average 6.2% or a 22-second improvement in the workout “Fran”. Blood tests also showed reduced lactate levels by 8.9% immediately post workout and a 7.1%, 10 minute post workout when compared to blood samples taken at baseline.
Another open label study on CK levels, completed in the beginning of 2014, showed an improvement of 63.55%. Results of all Xendurance studies are found on this website.
Xendurance continues to be on the forefront of using this science and success in providing sports nutrition to athletes in every sport, no matter the level of participation or performance.