The Effects of a Dietary Supplement on Exercise Performance in Healthy Older Adults"

2014-08-27 03:15:43 | BioPortfolio


Human exercise capacity decreases with aging. One explanation may be that blood vessels stiffen with age and release less of a compound called nitric oxide (NO). This compound normally relaxes blood vessels and increases blood flow to muscles, but damaging compounds called free radicals can interfere with this process. Antioxidants may help prevent free radicals from inactivating nitric oxide. The purpose of this study was to investigate the effects of an antioxidant supplement that supports NO production on exercise performance in elderly male cyclists.

Study Design

Allocation: Randomized, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Investigator), Primary Purpose: Basic Science




Arginine antioxidant supplements, Arginine antioxidant supplements


University of California, Los Angeles
Los Angeles
United States




University of California, Los Angeles

Results (where available)

View Results


Published on BioPortfolio: 2014-08-27T03:15:43-0400

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Medical and Biotech [MESH] Definitions

An enzyme that activates arginine with its specific transfer RNA. EC

A family of ENZYMES that, in the presence of calcium ion, converts ARGININE to CITRULLINE in proteins.

Nucleotide sequences that are found in the PROMOTER REGIONS of the genes of stress-responsive and cytoprotective proteins, such as those encoding antioxidant and PHASE II DETOXIFICATION enzymes. NF-E2-RELATED FACTOR 2 containing transcription factors bind to these elements during induction of these genes.

An enzyme that catalyzes the phosphorylation of the guanidine nitrogen of arginine in the presence of ATP and a divalent cation with formation of phosphorylarginine and ADP. EC

A natural tocopherol with less antioxidant activity than alpha-tocopherol. It exhibits antioxidant activity by virtue of the phenolic hydrogen on the 2H-1-benzopyran-6-ol nucleus. As in GAMMA-TOCOPHEROL, it also has three methyl groups on the 6-chromanol nucleus but at different sites.

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