ISSN:
1435-1463
Keywords:
Running
;
amino acids
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Summary Plasma large neutral amino acid concentrations were measured in thirty-seven subjects before and after completing the Boston Marathon. Concentrations of tyrosine, phenylalanine, and methionine increased, as did their “plasma ratios” (i.e., the ratio of each amino acid's concentration to the summed plasma concentrations of the other large neutral amino acids which compete with it for brain uptake). No changes were noted in the plasma concentrations of tryptophan, leucine, isoleucine, nor valine; however, the “plasma ratios” of valine, leucine, and isoleucine all decreased. These changes in plasma amino acid patterns may influence neurotransmitter synthesis.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01244992