Timing is key for muscle mass supplements, suggests study

By Stephen Daniells

- Last updated on GMT

Related tags: Heart

Taking creatine monohydrate and whey protein supplements just
before load-bearing exercise improves muscle gain and strength than
taking at other times of the day, says Australian research that has
implications outside of the weights room.

"Athletic performance and vanity aside, building muscle is a vital part of healthy ageing. An age-associated loss of muscle is thought to initiate many illnesses that shorten our lifespan such as osteoporosis, type-2 diabetes, and heart disease,"​ said lead researcher Dr Paul Cribb from Victoria University.

"This is one of very few studies that provides data on a safe, cost-effective strategy that can help maintain muscle mass through life,"​ he said.

The researchers recruited adult men to take part in the 10-week supervised resistance training program while consuming the supplements. The volunteers were divided into two groups, one took the supplements directly before exercise, while the other group took them at other times of the day. The supplements, a mixture of whey protein and creatine monohydrate, were provided by Colorado-based AST Sports Science, and according to the AST website Dr. Cribb is also AST's director of research.

The researchers report that the participants who took the supplements directly before and after exercise showed significantly better improvements in strength and muscle (fat-free) mass compared to a control group.

The changes in body composition were reportedly confirmed by muscle analyses at the cellular and subcellular levels.

"This study is the first to demonstrate that timing the consumption of these supplements promotes better results from exercise,"​ said Dr Cribb in a release. "This is a simple strategy that most adults could incorporate into their exercise programs."

The study was presented on August 15 at Fresh Science, a national program sponsored by the Federal and Victorian Governments. NutraIngredients.com has not seen the data but the research will reportedly be published in the November 2006 issue of the peer-review journal Medicine & Science in Sports & Exercise​, the official journal of the American College of Sports Medicine.

Creatine is banned in some countries because of studies showing a possible link between long-term supplementation and increased cancer risk. It is not banned by the International Olympic Committee, which classifies it as food.

Indeed, such concerns have slowed the market recently, which grew by only 4.2 per cent in 2004, a sharp contrast with the 50 per cent growth rates seen in the late 1990's.

However, previous studies have suggested creatine supplementation to be beneficial in the prevention of various cardiovascular and neurological diseases.

Moreover, the amino acid, that is chiefly available in the form of creatine monohydrate, was recently reported to be safe in humans up to doses of 5 grams per day, according to evidence from well-designed, randomized clinical trials (Regulatory Toxicology and Pharmacology​, doi: 10.1016/j.yrtph.2006.05.005).

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