Skeletal Muscle Metabolism in Endurance Athletes with Near-Infrared Spectroscopy

2013 ◽  
Vol 45 (8) ◽  
pp. 1640-1641
Author(s):  
&NA;
Keyword(s):  
Skeletal Muscle ◽  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Muscle Metabolism ◽  
Endurance Athletes ◽  
Skeletal Muscle Metabolism

Skeletal Muscle Metabolism in Endurance Athletes with Near-Infrared Spectroscopy

2013 ◽  
Vol 45 (5) ◽  
pp. 869-875 ◽  
Author(s):  
JARED TODD BRIZENDINE ◽  
TERENCE EDWARD RYAN ◽  
REBECCA DANTE LARSON ◽  
KEVIN K. McCULLY
Keyword(s):  
Skeletal Muscle ◽  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Muscle Metabolism ◽  
Endurance Athletes ◽  
Skeletal Muscle Metabolism

scholarly journals Oxidative metabolism in muscle

1997 ◽  
Vol 352 (1354) ◽  
pp. 677-683 ◽  
Author(s):  
M. Ferrari ◽  
T. Binzoni ◽  
V. Quaresima
Keyword(s):  
Skeletal Muscle ◽  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Oxidative Metabolism ◽  
Skeletal Muscles ◽  
Near Infrared ◽  
Clinical Medicine ◽  
Muscle Metabolism ◽  
Non Invasive ◽  
Invasive Measurement

Oxidative metabolism is the dominant source of energy for skeletal muscle. Near–infrared spectroscopy allows the non–invasive measurement of local oxygenation, blood flow and oxygen consumption. Although several muscle studies have been made using various near–infrared optical techniques, it is still difficult to interpret the local muscle metabolism properly. The main findings of near–infrared spectroscopy muscle studies in human physiology and clinical medicine are summarized. The advantages and problems of near–infrared spectroscopy measurements, in resting and exercising skeletal muscles studies, are discussed through some representative examples.

A comparison of exercise type and intensity on the noninvasive assessment of skeletal muscle mitochondrial function using near-infrared spectroscopy

2013 ◽  
Vol 114 (2) ◽  
pp. 230-237 ◽  
Author(s):  
Terence E. Ryan ◽  
Jared T. Brizendine ◽  
Kevin K. McCully
Keyword(s):  
Skeletal Muscle ◽  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Mitochondrial Function ◽  
Rate Constants ◽  
Near Infrared ◽  
Clinical Settings ◽  
Muscle Oxygen ◽  
Muscle Oxygen Consumption ◽  
Intensity Of Exercise

Near-infrared spectroscopy (NIRS) can be used to measure muscle oxygen consumption (mVO2) using arterial occlusions. The recovery rate of mVO2after exercise can provide an index of skeletal muscle mitochondrial function. The purpose of this study was to test the influence of exercise modality and intensity on NIRS measurements of mitochondrial function. Three experiments were performed. Thirty subjects (age: 18–27 yr) were tested. NIRS signals were corrected for blood volume changes. The recovery of mVO2after exercise was fit to a monoexponential curve, and a rate constant was calculated (directly related to mitochondrial function). No differences were found in NIRS rate constants for VOL and ES exercises (2.04 ± 0.57 vs. 2.01 ± 0.59 min−1for VOL and ES, respectively; P = 0.317). NIRS rate constants were independent of the contraction frequency for both VOL and ES (VOL: P = 0.166 and ES: P = 0.780). ES current intensity resulted in significant changes to the normalized time-tension integral (54 ± 11, 82 ± 7, and 100 ± 0% for low, medium, and high currents, respectively; P < 0.001) but did not influence NIRS rate constants (2.02 ± 0.54, 1.95 ± 0.44, 2.02 ± 0.46 min−1for low, medium, and high currents, respectively; P = 0.771). In summary, NIRS measurements of skeletal muscle mitochondrial function can be compared between VOL and ES exercises and were independent of the intensity of exercise. NIRS represents an important new technique that is practical for testing in research and clinical settings.

scholarly journals Home-based aerobic exercise training improves skeletal muscle oxidative metabolism in patients with metabolic myopathies

2016 ◽  
Vol 121 (3) ◽  
pp. 699-708 ◽  
Author(s):  
Simone Porcelli ◽  
Mauro Marzorati ◽  
Lucia Morandi ◽  
Bruno Grassi
Keyword(s):  
Skeletal Muscle ◽  
Infrared Spectroscopy ◽  
Exercise Training ◽  
Near Infrared Spectroscopy ◽  
Oxidative Metabolism ◽  
Near Infrared ◽  
Aerobic Training ◽  
Aerobic Exercise Training ◽  
Low Intensity ◽  
Home Based

Aerobic training can be effective in patients with mitochondrial myopathies (MM) and McArdle's disease (McA). The aim of the study was to use noninvasive functional evaluation methods, specifically aimed at skeletal muscle oxidative metabolism, to evaluate the effects of an aerobic exercise training (cycle ergometer, 12 wk, 4 days/wk, ∼65-70% of maximal heart rate) in 6 MM and 7 McA. Oxygen uptake and skeletal muscle vastus lateralis fractional O2 extraction by near-infrared spectroscopy were assessed during incremental and low-intensity constant work rate (CWR) exercises before (BEFORE) and at the end (AFTER) of training. Peak O2 uptake increased significantly with training both in MM [14.7 ± 1.2 vs. 17.6 ± 1.4 ml·kg−1·min−1 (mean ± SD)] and in McA (18.5 ± 1.8 ml·kg−1·min−1 vs. 21.6 ± 1.9). Peak skeletal muscle fractional O2 extraction increased with training both in MM (22.0 ± 6.7 vs. 32.6 ± 5.9%) and in McA (18.5 ± 6.2 vs. 37.2 ± 7.2%). During low-intensity CWR in both MM and McA: V̇o2 kinetics became faster in AFTER, but only in the patients with slow V̇o2 kinetics in BEFORE; the transient overshoot in fractional O2 extraction kinetics disappeared. The level of habitual physical activity was not higher 3 mo after training (FOLLOW-UP vs. PRE). In MM and McA patients a home-based aerobic training program significantly attenuated the impairment of skeletal muscle oxidative metabolism and improved variables associated with exercise tolerance. Our findings indicate that in MM and McA patients near-infrared spectroscopy and V̇o2 kinetics can effectively detect the functional improvements obtained by training.

scholarly journals Changes in skeletal muscle oxygenation during exercise measured by near-infrared spectroscopy on ascent to altitude

Critical Care ◽  
2009 ◽  
Vol 13 (Suppl 5) ◽  
pp. S7 ◽  
Author(s):  
Daniel S Martin ◽  
Denny ZH Levett ◽  
Michael Mythen ◽  
Mike PW Grocott ◽  
Keyword(s):  
Skeletal Muscle ◽  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Muscle Oxygenation ◽  
Skeletal Muscle Oxygenation

scholarly journals Skeletal Muscle Deoxygenation During Exercise Assessed by Near-Infrared Spectroscopy and its Relation to Expired Gas Analysis Parameters

1998 ◽  
Vol 62 (9) ◽  
pp. 649-657 ◽  
Author(s):  
Takeshi Miura ◽  
Toru Takeuchi ◽  
Hiroshi Sato ◽  
Naoko Nishioka ◽  
Setsuo Terakado ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Gas Analysis ◽  
Muscle Deoxygenation ◽  
Expired Gas Analysis ◽  
Expired Gas
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