Effects of epinephrine and lactate on the increase in oxygen consumption of nonexercising skeletal muscle after aerobic exercise

The purpose of this study was to measure consumption of nonexercising skeletal muscles at rest and after aerobic exercise and to investigate the stimulant factors of consumption. In experiment 1, we measured the resting metabolic rate of the finger flexor muscles in seven healthy males by -magnetic...

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Bibliographic Details
Published in:Journal of Biomedical Optics 2000-10, Vol.5 (4), p.406-410
Main Authors: Murakami, Motohide, Katsumura, Toshihito, Hamaoka, Takafumi, Osada, Takuya, Sako, Takayuki, Higuchi, Hiroyuki, Esaki, Kazuki, Kime, Ryotaro, Shimomitsu, Teruichi
Format: Article
Language:English
Subjects:
Adult
Blood
Body Temperature - physiology
catecholamines
consumption
Epinephrine - metabolism
Exercise - physiology
Hormones
Humans
Infrared spectroscopy
lactate
Lactic Acid - metabolism
Magnetic resonance imaging
Male
muscle O
muscle temperature
Muscle, Skeletal - metabolism
Musculoskeletal system
near infrared spectroscopy
Noninvasive medical procedures
Oxygen
Oxygen Consumption - physiology
Reference Values
Rest - physiology
Spectroscopy, Near-Infrared
Sympathomimetics - metabolism
Tissue
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Summary:The purpose of this study was to measure consumption of nonexercising skeletal muscles at rest and after aerobic exercise and to investigate the stimulant factors of consumption. In experiment 1, we measured the resting metabolic rate of the finger flexor muscles in seven healthy males by -magnetic resonance spectroscopy during a 15 min arterial occlusion. In experiment 2, the of the finger flexor muscles was measured using near infrared continuous wave spectroscopy at rest, immediate postexercise, and 3, 5, 10, 15, and 20 min following a cycling exercise at a workload corresponding to 50 of peak pulmonary uptake for 20 min. We also monitored deep tissue temperature in the measurement area and determined catecholamines and lactate concentrations in the blood at rest and immediate postexercise. at rest was and after exercise increased from the resting values. There were significant correlations between the increase in and the increase in epinephrine concentration and between the increase in and the increase in lactate concentration These results suggest that epinephrine and lactate concentrations are important stimulant factors. ©
ISSN:1083-3668
1560-2281
DOI:10.1117/1.1289143