Reliability of telemetric electromyography and near-infrared spectroscopy during high-intensity resistance exercise

Scott, Brendan R.; Slattery, Katie M.; Sculley, Dean V.; Lockie, Robert G.; Dascombe, Ben J.

doi:10.1016/j.jelekin.2014.07.008

Cited by 21 publications

(24 citation statements)

References 30 publications

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“…Research which has observed significantly lower levels of muscular oxygenation in hypoxia has employed long exposures to moderate terrestrial altitude (3 h at 1800 m) during resistance exercise (Oguri et al ., ) or a more severe level of hypoxia (F I O 2 = 10–12%) at rest (Richardson et al ., ; Rupp et al ., ). Furthermore, biological variations in the muscular oxygen flux can influence the reliability of NIRS variables during high‐load dynamic resistance exercise (Scott et al ., ). Based on these findings, it would appear that IHRT using high‐load resistance exercise is not likely to provide a sufficient stress to alter muscle oxygenation; however, further research is required to confirm these findings.…”

Section: Discussionmentioning

confidence: 99%

“…After back squat After deadlift the reliability of NIRS variables during high-load dynamic resistance exercise (Scott et al, 2014b). Based on these findings, it would appear that IHRT using high-load resistance exercise is not likely to provide a sufficient stress to alter muscle oxygenation; however, further research is required to confirm these findings.…”

Section: Preexercisementioning

confidence: 94%

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Acute physiological and perceptual responses to high‐load resistance exercise in hypoxia

Scott

Slattery²,

Sculley

et al. 2017

Clin Physio Funct Imaging

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This study assessed whether hypoxia during high-load resistance exercise could enhance the acute physiological responses related to muscular development. Twelve trained men performed exercise in three conditions: normoxia (fraction of inspired oxygen [F O ] = 21%), moderate-level hypoxia (F O = 16%) and high-level hypoxia (F O = 13%). Exercise comprised high-load squats and deadlifts (5 × 5 using 80% of 1-repetition maximum with 180-s rest). Muscle oxygenation and activation were monitored during exercise. Metabolic stress was estimated via capillary blood sampling. Perceived fatigue and soreness were also quantified following exercise. While the hypoxic conditions appeared to affect muscle oxygenation, significant differences between conditions were only noted for maximal deoxyhaemoglobin in the deadlift (P = 0·009). Blood lactate concentration increased from 1·1 to 1·2 mmol l at baseline to 9·5-9·8 mmol l after squats and 10·4-10·5 mmol l after deadlifts (P≤0·001), although there were no between-condition differences. Perceived fatigue and muscle soreness were significantly elevated immediately and at 24 h following exercise, respectively, by similar magnitudes in all conditions (P≤0·001). Muscle activation did not differ between conditions. While metabolic stress is thought to moderate muscle activation and subsequent muscular development during hypoxic resistance training, it is not augmented during traditional high-load exercise. This may be explained by the low number of repetitions performed and the long interset rest periods employed during this training. These findings suggest that high-load resistance training might not benefit from additional hypoxia as has been shown for low- and moderate-load training.

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Section: Discussionmentioning

confidence: 99%

Section: Preexercisementioning

confidence: 94%

Acute physiological and perceptual responses to high‐load resistance exercise in hypoxia

Scott

Slattery²,

Sculley

et al. 2017

Clin Physio Funct Imaging

Self Cite

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“…28 The coefficient of variation (CV) was calculated as a characteristic of the performance of within-subject evaluation, 29 with a CV below 5% to 10% considered as acceptable absolute reliability. 26 All statistical analyses were performed using Microsoft Excel and GraphPad Prism 7.…”

Section: Test-retest Reliability and Sensitivity Of Devices At Restmentioning

confidence: 99%

“…10,24 The PortaMon, a widely used, portable, SRS oximeter has previously demonstrated a high level of reliability at rest 25 and during isotonic, multijoint resistance exercise. 26 Conversely, no studies investigating the test-retest reliability of the MOXY device have been conducted.…”

Section: Introductionmentioning

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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“…1 Multimodal studies of muscle function are becoming increasingly common, most of them based on a combination of NIRS and EMG. 18,22,23 Many of these studies focus on investigating the relationship between muscle electrophysiology and oxygenation or hemodynamics [24][25][26][27][28] or on gathering more reliable information on, for example, neuromuscular and metabolic activity in relation to muscle fatigue or injury. 29,30 Moreover, wireless hybrid sEMG/NIRS sensors have recently been proposed for multimodal analysis by such researchers as Guo et al 34 Surface EMG and accelerometer (ACM) have been previously used for example for sign language recognition, 45 fatigue assessment, 46 Parkinson's disease progress assessment 47 and for monitoring daily activities of patients who have had a stroke.…”

mentioning

confidence: 99%

Combined surface electromyography, near-infrared spectroscopy and acceleration recordings of muscle contraction: The effect of motion

Kauppi

Korhonen

Ferdinando

et al. 2017

J. Innov. Opt. Health Sci.

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Noninvasive techniques, surface electromyography (sEMG) in particular, are being increasingly employed for assessing muscle activity. In these studies, local oxygen consumption and muscle metabolism are of great interest. Measurements can be performed noninvasively using optics-based methods such as near-infrared spectroscopy (NIRS). By combining energy consumption data provided by NIRS with muscle level activation data from sEMG, we may gain an insight into the metabolic and functional characteristics of muscle tissue. However, muscle motion may induce artifacts into EMG and NIRS. Thus, the inclusion of simultaneous motion measurements using accelerometers (ACMs) enhances possibilities to perceive the e®ects of motion on NIRS and EMG signals.This paper reviews the current state of noninvasive EMG and NIRS-based methods used to study muscle function. In addition, we built a combined sEMG/NIRS/ACM sensor to perform simultaneous measurements for static and dynamic exercises of a biceps brachii muscle. Further, we discuss the e®ect of muscle motion in response of NIRS and EMG when measured noninvasively. Based on our preliminary studies, both NIRS and EMG supply speci¯c information on muscle activation, but their signal responses also showed similarities with acceleration signals which, in this case, were supposed to be solely sensitive to motions.

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Reliability of telemetric electromyography and near-infrared spectroscopy during high-intensity resistance exercise

Abstract: However, it is likely that biological variation during multi-joint isotonic resistance exercise may account for some of the variation in the observed results.

Cited by 21 publications

References 30 publications

Acute physiological and perceptual responses to high‐load resistance exercise in hypoxia

Acute physiological and perceptual responses to high‐load resistance exercise in hypoxia

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

Combined surface electromyography, near-infrared spectroscopy and acceleration recordings of muscle contraction: The effect of motion

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