The sport performance of swimming athletes in three different levels including 5 national high-level swimming athletes, 5 ordinary swimming athletes and 5 college students was investigated by near-infrared spectrosco...The sport performance of swimming athletes in three different levels including 5 national high-level swimming athletes, 5 ordinary swimming athletes and 5 college students was investigated by near-infrared spectroscopy （NIRS）. Four parameters of muscle oxygenation and blood lactate （BLa） concentration were simultaneously monitored during incremental exercise on the ergometer. It was found that inflection points of muscle oxygenation and BLa concentration were consistent with the human sport capacity. Moreover, inflection points of muscle oxygenation occurred earlier than those of BLa concentration in ordinary athletes and college students. It implies monitoring changes of muscle oxygenation is superior to BLa measurement under this condition, since BLa test has an unavoidable time lag. Significant correlation （r2 = 0.948; P〈0.05） was observed between inflection points of muscle oxygenation difference and inflection points of BLa concentration on workload. This relationship suggests changes of muscle oxygenation detected by NIRS is beneficial to the evaluation of athletes＇ physiologic function and training load. Considering that muscle oxygenation could be in-vivo and non-invasively mea- sured by NIRS, it may be a better indicator of exercise intensity than BLa measurement in the near future.展开更多
It is a pleasure to contribute a commentary on the very interesting review by Dr.Orcioli-Silva and colleagues1 on the simultaneous measurements of cerebral cortex and muscle tissue oxygenation during exercise in healt...It is a pleasure to contribute a commentary on the very interesting review by Dr.Orcioli-Silva and colleagues1 on the simultaneous measurements of cerebral cortex and muscle tissue oxygenation during exercise in healthy adults using near-infrared spectroscopy(NIRS).The first NIRS measurements of the cerebral cortex and muscle were performed on humans in 19772 and 1982,3 respectively.展开更多
Britton Chance has pioneered magnetic resonance spectroscopy(MRS)and near-infrared(NIR)spectroscopy(NIRS)as noninvasive methods for measuring muscle metabolism in vivo from the late 1970s.This review honoring Britton ...Britton Chance has pioneered magnetic resonance spectroscopy(MRS)and near-infrared(NIR)spectroscopy(NIRS)as noninvasive methods for measuring muscle metabolism in vivo from the late 1970s.This review honoring Britton Chance will highlight the progress that has been made in developing and utilizing MRS and NIRS technologies for evaluating skeletal muscle O_(2) dynamics and energetics.Adaptation of MRS and NIRS technology has focused on the validity and reliability of the measurements and extending the methods in physiological and clinical research.Britton Chance has conducted MRS and NIRS research on elite athletes and a number of chronic health conditions,including patients with chronic heart failure,peripheral vascular disease,and neuromuscular myopathies.As MRS and NIRS technologies are practical and useful for measuring human muscle metabolism,we will strive to continue Chance's legacy by advancing muscle MRS and NIRS studies.展开更多
文摘The sport performance of swimming athletes in three different levels including 5 national high-level swimming athletes, 5 ordinary swimming athletes and 5 college students was investigated by near-infrared spectroscopy （NIRS）. Four parameters of muscle oxygenation and blood lactate （BLa） concentration were simultaneously monitored during incremental exercise on the ergometer. It was found that inflection points of muscle oxygenation and BLa concentration were consistent with the human sport capacity. Moreover, inflection points of muscle oxygenation occurred earlier than those of BLa concentration in ordinary athletes and college students. It implies monitoring changes of muscle oxygenation is superior to BLa measurement under this condition, since BLa test has an unavoidable time lag. Significant correlation （r2 = 0.948; P〈0.05） was observed between inflection points of muscle oxygenation difference and inflection points of BLa concentration on workload. This relationship suggests changes of muscle oxygenation detected by NIRS is beneficial to the evaluation of athletes＇ physiologic function and training load. Considering that muscle oxygenation could be in-vivo and non-invasively mea- sured by NIRS, it may be a better indicator of exercise intensity than BLa measurement in the near future.
文摘It is a pleasure to contribute a commentary on the very interesting review by Dr.Orcioli-Silva and colleagues1 on the simultaneous measurements of cerebral cortex and muscle tissue oxygenation during exercise in healthy adults using near-infrared spectroscopy(NIRS).The first NIRS measurements of the cerebral cortex and muscle were performed on humans in 19772 and 1982,3 respectively.
基金supported,in part,by a grant-in-aid from the Japanese Ministry of Education,Science,Sports,and Culture.
文摘Britton Chance has pioneered magnetic resonance spectroscopy(MRS)and near-infrared(NIR)spectroscopy(NIRS)as noninvasive methods for measuring muscle metabolism in vivo from the late 1970s.This review honoring Britton Chance will highlight the progress that has been made in developing and utilizing MRS and NIRS technologies for evaluating skeletal muscle O_(2) dynamics and energetics.Adaptation of MRS and NIRS technology has focused on the validity and reliability of the measurements and extending the methods in physiological and clinical research.Britton Chance has conducted MRS and NIRS research on elite athletes and a number of chronic health conditions,including patients with chronic heart failure,peripheral vascular disease,and neuromuscular myopathies.As MRS and NIRS technologies are practical and useful for measuring human muscle metabolism,we will strive to continue Chance's legacy by advancing muscle MRS and NIRS studies.
