Aerobic training enhances muscle deoxygenation in early post-myocardial infarction

Takagi, Shun; Murase, Norio; Kime, Ryotaro; Niwayama, Masatsugu; Osada, Takuya; Katsumura, Toshihito

doi:10.1007/s00421-016-3326-x

Cited by 20 publications

(23 citation statements)

References 36 publications

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“…Muscle oxygenation was measured using a light-emitting diode sensor for near-infrared spatial resolved spectroscopy (NIR SRS : Hb14; ASTEM, Kanagawa, Japan) at 2 wave lengths (770 and 830 mm) and a sampling frequency of 5 Hz, with the diode located on the right vastus lateralis at 30% of the length between the patella and greater trochanter ( 26 ). The NIR SRS technique provides continuous, noninvasive monitoring of changes in oxygenated, deoxygenated, and total hemoglobin (∆oxy-Hb, ∆deoxy-Hb, and ∆total-Hb, respectively) concentrations in comparison with those at rest before the standardized warm-up and muscle oxygen saturation (SmO 2 ).…”

Section: Methodsmentioning

confidence: 99%

“…The NIR SRS technique provides continuous, noninvasive monitoring of changes in oxygenated, deoxygenated, and total hemoglobin (∆oxy-Hb, ∆deoxy-Hb, and ∆total-Hb, respectively) concentrations in comparison with those at rest before the standardized warm-up and muscle oxygen saturation (SmO 2 ). The probe consisted of 1 light source and 2 photodiode detectors, and the optode distances were 20 and 30 mm ( 26 ). In this study, ∆oxy-Hb, ∆deoxy-Hb, ∆total-Hb, and SmO 2 were calculated using fat-correction software (Hb11; ASTEM, Kanagawa, Japan) ( 26 ), with the thickness of the fat layer measured using ultrasonography (LogiQ3; GE Healthcare, Tokyo, Japan) before each experimental trial.…”

Section: Methodsmentioning

confidence: 99%

“…The probe consisted of 1 light source and 2 photodiode detectors, and the optode distances were 20 and 30 mm ( 26 ). In this study, ∆oxy-Hb, ∆deoxy-Hb, ∆total-Hb, and SmO 2 were calculated using fat-correction software (Hb11; ASTEM, Kanagawa, Japan) ( 26 ), with the thickness of the fat layer measured using ultrasonography (LogiQ3; GE Healthcare, Tokyo, Japan) before each experimental trial.…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Very-Short-Duration, Low-Intensity Half-Time Re–warm up Increases Subsequent Intermittent Sprint Performance

Yanaoka

Hamada

Kashiwabara

et al. 2018

Journal of Strength and Conditioning Research

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Yanaoka, T, Hamada, Y, Kashiwabara, K, Kurata, K, Yamamoto, R, Miyashita, M, and Hirose, N. Very-short-duration, low-intensity half-time re–warm up increases subsequent intermittent sprint performance. J Strength Cond Res 32(11): 3258–3266, 2018—This study investigated the effect of very-short-duration, low-intensity half-time re–warm up (RW) on subsequent intermittent sprint performance. Using a randomized cross-over design, 11 healthy men performed 3 trials. In the experimental trials, participants performed the first 40-minute intermittent exercise followed by a 15-minute half-time. The interventions at half-time were 15 minutes of seated rest (control), 3 minutes of moderate-intensity RW (cycling at 60% of maximal oxygen uptake [V̇o2max]; [60% RW]), and 3 minutes of low-intensity RW (cycling at 30% of V̇o2max; [30% RW]). After half-time, participants performed the Cycling Intermittent-Sprint Protocol (CISP), which consisted of 10 seconds of rest, 5 seconds of maximal sprint, and 105 seconds of active recovery at 50% of V̇o2max, with the cycles repeated over the 20-minute duration. The mean work and electromyogram amplitude during the sprint in the CISP were higher in both RW trials than in the control trial (p < 0.05). Muscle temperature, estimated from the skin temperature, at 60 minutes was higher in the 60% RW trial than in the control and 30% RW trials (p < 0.05). The mean change in oxygenated hemoglobin concentration during active recovery at 55–65 minutes tended to be higher in both RW trials than in the control trial (60% RW trial: p = 0.06, 30% RW trial: p = 0.06). In conclusion, very-short-duration, low-intensity RW increased intermittent sprint performance after the half-time, in comparison with a traditional passive half-time practice, and was as effective as a moderate-intensity RW when matched for total duration.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Very-Short-Duration, Low-Intensity Half-Time Re–warm up Increases Subsequent Intermittent Sprint Performance

Yanaoka

Hamada

Kashiwabara

et al. 2018

Journal of Strength and Conditioning Research

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“…Some simple NIRS devices, such as the ASTEM NIR SRS , have incorporated adipose layer measurements to improve the accuracy of their algorithms. 49 In principle, both PortaMon and MOXY methods described in this paper could make similar adjustments. Previous authors have incorporated ATTs of individual subjects as measured by ultrasound combined with SRS measurements in a two layer (adipose/muscle) Monte Carlo model to directly calculate muscle μ a .…”

Section: Comparing Algorithmsmentioning

confidence: 99%

Performance comparison of the MOXY and PortaMon near-infrared spectroscopy muscle oximeters at rest and during exercise

2018

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Abstract. The purpose of the study was to compare muscle oxygenation as measured by two portable, wireless near-infrared spectroscopy (NIRS) devices under resting and dynamic conditions. A recently developed low-cost NIRS device (MOXY) was compared against an established PortaMon system that makes use of the spatially resolved spectroscopy algorithm. The influence of increasing external pressure on tissue oxygen saturation index (TSI) indicated that both devices are stable between 2 and 20 mmHg. However, above this pressure, MOXY reports declining TSI values. Analysis of adipose tissue thickness (ATT) and TSI shows a significant, nonlinear difference between devices at rest. The devices report similar TSI (%) values at a low ATT (<7 mm) (PortaMon minus MOXY difference is þ1.1 AE 2.8%) with the major subsequent change between the devices occurring between 7 and 10 mm; at ATT values >10 mm the difference remains constant (−14.7 AE 2.8%). The most likely explanation for this difference is the small source-detector separation (2.5 cm) in the MOXY resulting in lower tissue penetration into muscle in subjects with higher ATT. Interday test-retest reliability of resting TSI was evaluated on five separate occasions, with the PortaMon reporting a lower coefficient of variation (1.8% to 2.5% versus 5.7% to 6.2%). In studies on male subjects with low ATT, decreases in the TSI were strongly correlated during isometric exercise, arterial occlusion, and incremental arm crank exercise. However, the MOXY reports a greater dynamic range, particularly during ischemia induced by isometric contraction or occlusion (Δ74.3% versus Δ43.7%; hyperemia MAX-occlusion MIN). This study shows that in this subject group both MOXY and PortaMon produce physiologically credible TSI measures during rest and exercise. However, the absolute values obtained during exercise are generally not comparable between devices unless corrected by physiological calibration following an arterial occlusion. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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“…a blunted increase in deoxy-Hb/Mb and a minor decrease in SmO2 with similar response in total-Hb) in early after onset of myocardial infarction (MI) patients, compared to age-matched elderly subjects without MI 11) . Therefore, we recruited patients in early post-MI (n = 16, 60 ± 10 years) and divided them into aerobic training (30 min cycling at approximately lactate threshold, 20 ± 3 sessions over 12 weeks) or nontraining groups 16) . After 12 weeks, the training group showed a reduction in oxy-Hb/Mb (but the difference did not reach significance), an increase in deoxy-Hb/Mb, and a decrease in SmO2 during ramp cycling exercise, while total-Hb was not significantly changed between before and after training.…”

Section: Relationship Between Muscle O2 Dynamics and Peak V ・ O2mentioning

confidence: 99%

Skeletal muscle oxygen dynamics and peak aerobic capacity

Takagi

2016

JPFSM

Self Cite

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Skeletal muscle O2 dynamics can be measured during whole body dynamic exercise noninvasively by near-infrared spectroscopy (NIRS), and muscle O 2 dynamics can allow us to estimate muscle O2 extraction. Muscle O2 extraction is one of the determinants of peak pulmonary O2 uptake (V ・ O2), and blunted peak V ・ O2 potentially increases cardiovascular-associated morbidity and mortality. However, muscle O2 dynamics and their relation to reduced peak aerobic capacity have not been fully established. This review briefly outlines the relationship between change in muscle O2 dynamics and an improvement of peak V ・ O2. Our findings suggest that aerobic training enhances estimated muscle O2 extraction, and the enhancement is related to an improvement of peak aerobic capacity in elderly subjects, with and without heart disease. The relationship may be potentially affected, however, by some factors such as: the initial level of aerobic capacity and cardiac function (ability of convective O2 supply), and training volume, phase, or type. The number of elderly people who have a low peak aerobic capacity will most likely be increasing in Japan, as a consequence of the aging population and physical inactivity due to advanced technology. Although we recognize several limitations of the NIRS technique and the necessity for further investigation, assessing muscle O2 dynamics is valuable to understand the peripheral impairments and mechanisms of lowered peak V ・ O2.

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Aerobic training enhances muscle deoxygenation in early post-myocardial infarction

Cited by 20 publications

References 36 publications

Very-Short-Duration, Low-Intensity Half-Time Re–warm up Increases Subsequent Intermittent Sprint Performance

Very-Short-Duration, Low-Intensity Half-Time Re–warm up Increases Subsequent Intermittent Sprint Performance

Performance comparison of the MOXY and PortaMon near-infrared spectroscopy muscle oximeters at rest and during exercise

Skeletal muscle oxygen dynamics and peak aerobic capacity

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