Wearable Sensor for Multi-wavelength Near-Infrared Spectroscopy of Skin Hemodynamics Along with Underlying Muscle Electromyography

Mujumdar, Radhika; Cheung, Mancheung; Kadam, Shweta Pramod; Dutta, Anirban

doi:10.1007/978-3-030-70316-5_66

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…These findings may indicate the importance of muscle activity in RE‐mediated pain modulation and may explain why consistent and profound EIH is commonly observed following both, high intensity exercise or prolonged low intensity tasks (Hoeger Bement et al., 2008 ; Koltyn, 2000 ; Naugle et al., 2012 ). When exercising to volitional fatigue, motor unit recruitment strategies are altered, reflected as increased RMS and decreased MDF (Fallentin et al., 1993 ; Mujumdar et al., 2022 ). Not surprisingly, EIH responders also showed greater MDF decrease compared to nonresponders in moderate intensity RE.…”

Section: Discussionmentioning

confidence: 99%

Muscle activity and hypoalgesia in blood flow restricted versus unrestricted effort‐matched resistance exercise in healthy adults

Yang,

O'Keeffe,

Shirazi

et al. 2024

Physiological Reports

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This study assessed muscle activity (root mean square, RMS, and median frequency, MDF) to evaluate the acute response to blood flow restriction (BFR) resistance exercise (RE) and conventional moderate intensity (MI) RE. We also performed exploratory analyses of differences based on sex and exercise‐induced hypoalgesia (EIH). Fourteen asymptomatic individuals performed four sets of unilateral leg press with their dominant leg to volitional fatigue under two exercise conditions: BFR RE and MI RE. Dominant side rectus femoris (RF) and vastus lateralis (VL) muscle activity were measured using surface electromyography (sEMG) through exercise. RMS and MDF were calculated and compared between conditions and timepoints using a linear mixed model. Pressure pain thresholds (PPT) were tested before and immediately after exercise and used to quantify EIH. Participants were then divided into EIH responders and nonresponders, and the differences on RMS and MDF were compared between the two groups using Hedges' g. RMS significantly increased over time (RF: p = 0.0039; VL: p = 0.001) but not between conditions (RF: p = 0.4; VL: p = 0.67). MDF decreased over time (RF: p = 0.042; VL: p < 0.001) but not between conditions (RF: p = 0.74; VL: p = 0.77). Consistently lower muscle activation was found in females compared with males (BRF, RF: g = 0.63; VL, g = 0.5. MI, RF: g = 0.72; VL: g = 1.56), with more heterogeneous findings in MDF changes. For BFR, EIH responders showed greater RMS changes (Δ RMS) (RF: g = 0.90; VL: g = 1.21) but similar MDF changes (Δ MDF) (RF: g = 0.45; VL: g = 0.28) compared to nonresponders. For MI, EIH responders demonstrated greater increase on Δ RMS (g = 0.61) and decrease on Δ MDF (g = 0.68) in RF but similar changes in VL (Δ RMS: g = 0.40; Δ MDF: g = 0.39). These results indicate that when exercising to fatigue, no statistically significant difference was observed between BFR RE and conventional MI RE in Δ RMS and Δ MDF. Lower muscle activity was noticed in females. While exercising to volitional fatigue, muscle activity may contribute to EIH.

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Section: Discussionmentioning

confidence: 99%

Muscle activity and hypoalgesia in blood flow restricted versus unrestricted effort‐matched resistance exercise in healthy adults

Yang,

O'Keeffe,

Shirazi

et al. 2024

Physiological Reports

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“…It has several advantages, including the use of low-cost, silent, transportable/portable instrumentation, and the ability to move freely during the measurements [7][8][9]. Multi-channel and multi-wavelength NIRS is gradually being widely developed and applied due to its advantage of providing more signals and information than other comparable techniques [10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach to Evaluating Crosstalk for Near-Infrared Spectrometers

Chen,

Cao,

et al. 2024

Sensors

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Multi-channel and multi-parameter near-infrared spectroscopy (NIRS) has gradually become a new research direction and hot spot due to its ability to provide real-time, continuous, comprehensive indicators of multiple parameters. However, multi-channel and multi-parameter detection may lead to crosstalk between signals. There is still a lack of benchmarks for the evaluation of the reliability, sensitivity, stability and response consistency of the NIRS instruments. In this study, a set of test methods (a human blood model test, ink drop test, multi-channel crosstalk test and multi-parameter crosstalk test) for analyzing crosstalk and verifying the reliability of NIRS was conducted to test experimental verification on a multi-channel (8-channel), multi-parameter (4-parameter) NIRS instrument independently developed by our team. Results show that these tests can be used to analyze the signal crosstalk and verify the reliability, sensitivity, stability and response consistency of the NIRS instrument. This study contributes to the establishment of benchmarks for the NIRS instrument crosstalk and reliability testing. These novel tests have the potential to become the benchmark for NIRS instrument reliability testing.

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Wearable Sensor for Multi-wavelength Near-Infrared Spectroscopy of Skin Hemodynamics Along with Underlying Muscle Electromyography

Cited by 2 publications

References 9 publications

Muscle activity and hypoalgesia in blood flow restricted versus unrestricted effort‐matched resistance exercise in healthy adults

Muscle activity and hypoalgesia in blood flow restricted versus unrestricted effort‐matched resistance exercise in healthy adults

A Novel Approach to Evaluating Crosstalk for Near-Infrared Spectrometers

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