Energetics of aging human muscle using 31P NMR - comparison of older endurance athletes and untrained subjects

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Bibliographic Details
Title translated into German:Untersuchung des Energiestoffwechsels im alternden menschlichen Muskel mit Hilfe der 31P-Magnetresonanzspektroskopie - Vergleich aelterer Ausdauersportler mit untrainierten Personen
Author:Kuno, S.; Akisada, M.; Katsuta, S.; Niitsu, M.; Anno, I.; Matsumoto, K.; Ohmori, H.; Shimegi, S.
Published in:Bulletin of the Physical Fitness Research Institute
Published:1990, 75 , S. 48-53, Lit.
Format: Publications (Database SPOLIT)
Publication Type: Journal article
Media type: Print resource
Language:Japanese
ISSN:0389-9071
Keywords:
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Identification number:PU199705205032
Source:BISp

Author's abstract

Human skeletal muscle has been studied in vivo by 31P nuclear magnetic resonance. Older endurance athletes were compared with sedentary elderly subjects aged 60-70 years. Phosphocreatine-inorganic phosphate ratio (PCr/Pi), intracellular pH were measured. At rest, no differences were found between two groups. Aerobic dynamic exercise resulted in a similar reduction of PCr/Pi in both groups. The pH fall in exercise was not significantly different in the trained and sedentary subjects. Whenever, PCr/Pi and pH of two groups during exercise and recovery were lower than young adult subjects of the other study. These results suggest that there are small differences in energy production during exercise and recovery and aging process affect the metabolic ability of human skeletal muscle. Verf.-Referat