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20.11.2013


Xpand-2X doubles bodybuilders' progression

Supplements manufacturer Dymatize has given its multi-ingredient performance supplement an appropriate name. According to a study published in the Journal of the International Society of Sports Nutrition, Xpand-2X does exactly what its name suggests. The supplement doubles the increase in bodybuilders' strength and their muscle mass.
Supplements manufacturer Dymatize has given its multi-ingredient performance supplement an appropriate name. According to a study published in the Journal of the International Society of Sports Nutrition, Xpand-2X does exactly what its name suggests. The supplement doubles the increase in bodybuilders' strength and their muscle mass.

Protein supplements are still the mainstay of the sports food industry but the companies are increasingly turning their attention to multi-ingredient performance supplements, aka MIPS: mixtures containing proteins, vitamins, amino acids, creatine, plant extracts and other substances you'd expect to have an ergogenic effect. Xpand-2X is one of these supplements.

Only the approximate composition of Xpand-2X is known. For starters a 10g spoonful of the stuff contains a mix of creatine, beta-alanine and creatinol.

The same amount also contains a 1.6g cocktail of taurine, BCAAs and alanyl-glutamine, and 500 mg of a mixture of substances that are said to boost the body's nitrogen monoxide concentration, such as beetroot and pomegranate extracts.


Supplements manufacturer Dymatize has given its multi-ingredient performance supplement an appropriate name. According to a study published in the Journal of the International Society of Sports Nutrition, Xpand-2X does exactly what its name suggests. The supplement doubles the increase in bodybuilders' strength and their muscle mass.


And finally the same 10g of Xpand-2X also contain 620 mg of stimulants, such as caffeine, N-acetyl-tyrosine and Rhodiola rosea extract, and some B-vitamins and quercetin analogues.

The amount of active substances is on the low side however. The most important substance in a 10g spoonful of Xpand-2X is the quickly absorbed carbohydrate maltodextrin.

Whatever.

Researchers at the University of Tampa in the American state of Florida, together with Xpand-2X manufacturer Dymatize, got twenty young men with an average age of 21 to do weight training in the same way for a period of eight weeks. The men had all been doing strength training for a few years. During the experiment they trained three times a week.

Half of the men were given a placebo during the eight weeks. The other half were given 10 g Xpand-2X to take three times a day during meals on the days that they didn't train. On the training days the men in the experimental group were also given 10g Xpand-X2 30 minutes before starting to train.

The figures below show that the thickness of the leg muscles [Thickness], the lean body mass [LBM] and the maximal weight with which the men were able to do bench presses [Change in Strength] doubled in the supplement takers as opposed to the results for the placebo group.


Supplements manufacturer Dymatize has given its multi-ingredient performance supplement an appropriate name. According to a study published in the Journal of the International Society of Sports Nutrition, Xpand-2X does exactly what its name suggests. The supplement doubles the increase in bodybuilders' strength and their muscle mass.


Supplements manufacturer Dymatize has given its multi-ingredient performance supplement an appropriate name. According to a study published in the Journal of the International Society of Sports Nutrition, Xpand-2X does exactly what its name suggests. The supplement doubles the increase in bodybuilders' strength and their muscle mass.


Supplements manufacturer Dymatize has given its multi-ingredient performance supplement an appropriate name. According to a study published in the Journal of the International Society of Sports Nutrition, Xpand-2X does exactly what its name suggests. The supplement doubles the increase in bodybuilders' strength and their muscle mass.


These are impressive results, but they do raise the question that always comes up when researchers report about the good performance of a multi-ingredient performance supplement in a human study: wouldn't the subjects in the experimental group have made exactly the same progression if they’d been given ordinary creatine? If necessary supplemented with ordinary BCAAs?

The researchers have added their opinion to this debate, according to the concluding sentences in the article.

"The collective results of our research indicate that Xpand 2X supplementation results in significant increases in bench press strength, hypertrophy, and lean body mass in resistance-trained men", they write. "Therefore, coaches, trainers, and athletes may increase the benefits of their workouts by supplementing with Xpand 2X prior to exercise. Future research should investigate if supplementation with Xpand 2X would result in better adaptations than supplementation with each of the ingredients alone."

Source:
J Int Soc Sports Nutr. 2013 Oct 9;10(1):44.

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