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Lin CF, Liao JC, Hernandez M, Sadruddin R, Pappu S, Jan YK. Comparison of Isometric and Dynamic Bridging Exercises on Low Back Muscle Oxygenation. Int J Sports Med 2024. [PMID: 39079704 DOI: 10.1055/a-2376-6255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/13/2024]
Abstract
Bridging exercises are commonly performed by people with low back pain (LBP). However, the effect of the contraction mode in a bridging exercise on the hemodynamics of the low back muscle has not been investigated in people with and without LBP. The objective of this study was to assess the effect of the mode of bridging exercise on oxygenation of the low back muscle. A near-infrared spectroscopy was used to measure hemodynamic responses of the erector spinae between isometric and dynamic bridging exercises in 16 healthy participants. The results demonstrated that during exercise, the isometric bridging exercise significantly decreased oxyhemoglobin and deoxy-hemoglobin compared to the dynamic bridging exercise (oxyhemoglobin, t=- 3.109, p=0.007, Cohen's d=0.68 and deoxy-hemoglobin, t=- 2.193, P=0.046, Cohen's d=0.60). The results also demonstrated that after exercise, the dynamic bridging exercise induced a significantly higher oxygenation response (oxygenation, t=- 2.178, P=0.048, Cohen's d=0.43). This study indicates that the dynamic bridging exercise is more effective in improving oxygenation of low back muscles.
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Affiliation(s)
- Cheng-Feng Lin
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, United States
- Department of Physical Therapy, National Cheng Kung University, Tainan, Taiwan
| | - Jen-Chieh Liao
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, United States
- Department of Neurosurgery, Chi Mei Hospital Chiali, Tainan, Taiwan
| | - Manuel Hernandez
- Department of Biomedical and Translational Sciences, University of Illinois at Urbana-Champaign, Urbana, United States
| | - Rahil Sadruddin
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, United States
| | - Suguna Pappu
- Department of Neurosurgery, Carle Foundation Hospital, Urbana, United States
| | - Yih-Kuen Jan
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, United States
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Zhou Y, Reddy C, Zhang X. The deflection of fatigued neck. Proc Natl Acad Sci U S A 2024; 121:e2401874121. [PMID: 39133855 PMCID: PMC11348306 DOI: 10.1073/pnas.2401874121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2024] [Accepted: 07/10/2024] [Indexed: 08/29/2024] Open
Abstract
The human neck is a unique mechanical structure, highly flexible but fatigue prone. The rising prevalence of neck pain and chronic injuries has been attributed to increasing exposure to fatigue loading in activities such as prolonged sedentary work and overuse of electronic devices. However, a causal relationship between fatigue and musculoskeletal mechanical changes remains elusive. This work aimed to establish this relationship through a unique experiment design, inspired by a cantilever beam mechanical model of the neck, and an orchestrated deployment of advanced motion-force measurement technologies including dynamic stereo-radiographic imaging. As a group of 24 subjects performed sustained-till-exhaustion neck exertions in varied positions-neutral, extended, and flexed, their cervical spine musculoskeletal responses were measured. Data verified the occurrence of fatigue and revealed fatigue-induced neck deflection which increased cervical lordosis or kyphosis by 4-5° to 11°, depending on the neck position. This finding and its interpretations render a renewed understanding of muscle fatigue from a more unified motor control perspective as well as profound implications on neck pain and injury prevention.
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Affiliation(s)
- Yu Zhou
- Department of Industrial and Systems Engineering, Texas A&M University, College Station, TX77843
| | - Curran Reddy
- Department of Biomedical Engineering, Texas A&M University, College Station, TX77843
| | - Xudong Zhang
- Department of Industrial and Systems Engineering, Texas A&M University, College Station, TX77843
- Department of Biomedical Engineering, Texas A&M University, College Station, TX77843
- Department of Mechanical Engineering, Texas A&M University, College Station, TX77843
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3
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Brouwer NP, Kingma I, van Dijk W, van Dieën JH. Can intermittent changes in trunk extensor muscle length delay muscle fatigue development? J Biomech 2024; 162:111881. [PMID: 38049364 DOI: 10.1016/j.jbiomech.2023.111881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 11/01/2023] [Accepted: 11/19/2023] [Indexed: 12/06/2023]
Abstract
Muscle length changes may evoke alternating activity and consequently reduce local fatigue and pain during prolonged static bending. The aim of this study was to assess whether a postural intervention involving intermittent trunk extensor muscle length changes (INTERMITTENT) can delay muscle fatigue during prolonged static bending when compared to a near-isometric condition (ISOMETRIC) or when participants were allowed to voluntarily vary muscle length (VOLUNTARY). These three conditions were completed by 11 healthy fit male participants, in three separate sessions of standing with 30 ± 3 degrees trunk inclination until exhaustion. Conventional and high-density electromyography (convEMG and HDsEMG, respectively) were measured on the left and right side of the spine, respectively. The endurance time for INTERMITTENT was 33.6% greater than ISOMETRIC (95% CI: [3.8, 63.5]; p = 0.027) and 29.4% greater than VOLUNTARY (95% CI: [7.0, 51.7]; p = 0.010), but not different between ISOMETRIC and VOLUNTARY. The convEMG and HDsEMG amplitude coefficient of variation was significantly greater for INTERMITTENT versus ISOMETRIC. The rate of change in convEMG and HDsEMG spectral content did not reveal significant differences between conditions as found in endurance time. Additional regression analyses between endurance time and rate of change in convEMG (p > 0.05) and HDsEMG (R2 = 0.39-0.65, p = 0.005-0.039) spectral content indicated that HDsEMG better reflects fatigue development in low-level contractions. In conclusion, imposed intermittent trunk extensor muscle length changes delayed muscle fatigue development when compared to a near-isometric condition or when participants were allowed to voluntarily vary muscle length, possibly due to evoking alternating activity between/within trunk extensor muscles.
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Affiliation(s)
- Niels P Brouwer
- Department of Human Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, the Netherlands
| | - Idsart Kingma
- Department of Human Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, the Netherlands
| | | | - Jaap H van Dieën
- Department of Human Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, the Netherlands.
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Zhang H, Meng L, Yang Z. Biomechanical mechanism driving typical postural shifts of lower limbs during sleeping in an aircraft seat. Eur J Appl Physiol 2023; 123:2023-2039. [PMID: 37147512 DOI: 10.1007/s00421-023-05220-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 04/14/2023] [Indexed: 05/07/2023]
Abstract
The purpose of this study was to determine the biomechanical mechanisms driving passengers' lower-limb postural shifts during seated sleep on a flight to prevent negative effects on passengers' physical health. Twenty subjects participated in an observational study and a subsequent experiment on fatigue development and tissue oxygenation changes during seated sleep in an economy-class aircraft seat. Three of the most frequently used postures, which involved four targeted muscles of the legs and the thigh-buttock region, were selected and examined in the experiment with the following measures: muscle electromyogram, tissue oxygenation, and body contact pressure distribution. The results showed that the fatigue of the tibialis anterior and gastrocnemius and the compression of the region under the medial tuberosities were relieved by alternations among the three positions-position 1 (placing the shanks forwards), position 2 (placing the shanks neutrally), and position 3 (placing the shanks backwards). This research reveals the mechanical properties of the biomechanical factors functioning in lower-limb postural shifts during seated sleep and provides design optimization strategies for economy-class aircraft seats to reduce the negative effects on passenger health.
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Affiliation(s)
- Huizhong Zhang
- School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an, China
| | - Lei Meng
- College of Art, Xi'an University of Architecture and Technology, Xi'an, China.
| | - Zhi Yang
- Department of Science and Technology, Beijing Institute of Fashion Technology, Beijing, China
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Gál-Pottyondy A, Petró B, Takács M, Négyesi J, Nagatomi R, Kiss RM. Compensatory muscle activation and spinal curve changes in response to fatigue among adolescent male athletes. BMC Sports Sci Med Rehabil 2023; 15:57. [PMID: 37055780 PMCID: PMC10103397 DOI: 10.1186/s13102-023-00668-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 04/05/2023] [Indexed: 04/15/2023]
Abstract
BACKGROUND The prone plank test has been often used to assess the strength and endurance of trunk muscles. We aimed to develop a new measurement protocol to objectively monitor the changes in spinal curves and muscle activity simultaneously. METHODS Eleven adolescent male basketball athletes (13-17 years) performed a one-minute plank test. Spinal curvatures (thoracic kyphosis (TK) and lumbar lordosis (LL)) were determined at each time point by optical tracking of markers placed on the spinous processes of 10 vertebrae. Eleven muscles were measured by surface electromyography to determine muscle fatigue via changes in median frequency. RESULTS TK significantly increased (p = 0.003) from the first to the last 10 s of the plank test; changes in LL were mixed within the group. Only the rectus abdominis showed consistent and significant fatigue (p < 0.001). The increased spinal curves significantly correlated with the fatigue of biceps femoris (TK: r = -0.75, p = 0.012; LL: r = -0.71, p = 0.019) indicating a compensatory muscle activation and spinal curve changes in response to fatigue. CONCLUSION Our protocol may support future researches that aim to objectively evaluate the prone plank test and which posture-related muscles need strengthening for the individual.
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Affiliation(s)
- Anna Gál-Pottyondy
- Doctoral School of Sport Sciences, Hungarian University of Sports Science, Budapest, Hungary
| | - Bálint Petró
- Faculty of Mechanical Engineering, Department of Mechatronics, Optics and Engineering Informatics, Budapest University of Technology and Economics, Budapest, Hungary
| | | | - János Négyesi
- Faculty of Mechanical Engineering, Department of Mechatronics, Optics and Engineering Informatics, Budapest University of Technology and Economics, Budapest, Hungary
- Department of Kinesiology, Hungarian University of Sports Science, Budapest, Hungary
- Fit4Race Kft, Budapest, Hungary
- Department of Medicine and Science in Sports and Exercise, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Ryoichi Nagatomi
- Department of Medicine and Science in Sports and Exercise, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Rita M Kiss
- Faculty of Mechanical Engineering, Department of Mechatronics, Optics and Engineering Informatics, Budapest University of Technology and Economics, Budapest, Hungary.
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Zhao H, Seo D, Okada J. Validity of using perceived exertion to assess muscle fatigue during back squat exercise. BMC Sports Sci Med Rehabil 2023; 15:14. [PMID: 36739396 PMCID: PMC9899404 DOI: 10.1186/s13102-023-00620-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 01/20/2023] [Indexed: 02/06/2023]
Abstract
The rating of perceived exertion (RPE) scale has been found to reflect physiological responses, and this study aimed to assess the validity of using the Borg CR-10 scale and velocity loss to evaluate muscle fatigue quantified by surface electromyography during back squat (BS) exercise. A total of 15 collegiate male athletes underwent three non-explosive BS tasks comprising low, medium, and high volumes at 65% of their one-repetition maximum. RPEs, spectral fatigue index (SFI), and velocity loss during BS exercise were assessed throughout the trials. Significant differences in overall RPE (p < 0.001) and average SFI (p < 0.05) were observed between the conditions, whereas no significant difference was observed in average velocity loss. Significant increases in RPE and SFI (p < 0.001) were observed within the exercise process, whereas a significant increase in velocity loss was not observed. Correlation analyses indicated a significant correlation between RPE and SFI obtained during exercise (r = 0.573, p < 0.001). However, no significant correlation was observed between velocity loss and SFI. These results demonstrated that RPE could be used as a muscle fatigue predictor in BS exercise, but that velocity loss may not reflect muscle fatigue correctly when participants cannot and/or are not required to perform BS explosively. Furthermore, practitioners should not use velocity loss as a muscle fatigue indicator in some resistance exercise situations, such as rehabilitation, beginner, and hypertrophy programs.
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Affiliation(s)
- Hanye Zhao
- grid.5290.e0000 0004 1936 9975Graduate School of Sport Sciences, Waseda University, Tokorozawa, Saitama Japan ,grid.5290.e0000 0004 1936 9975Graduate School of Sport Sciences, Waseda University, Mikajima 2-579-15, Tokorozawa, Saitama 359-1192 Japan
| | - Dasom Seo
- grid.5290.e0000 0004 1936 9975Graduate School of Sport Sciences, Waseda University, Tokorozawa, Saitama Japan
| | - Junichi Okada
- grid.5290.e0000 0004 1936 9975Faculty of Sport Sciences, Waseda University, Tokorozawa, Saitama Japan
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Majdi JA, Acuña SA, Chitnis PV, Sikdar S. Toward a wearable monitor of local muscle fatigue during electrical muscle stimulation using tissue Doppler imaging. WEARABLE TECHNOLOGIES 2022; 3:e16. [PMID: 38486895 PMCID: PMC10936279 DOI: 10.1017/wtc.2022.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 05/26/2022] [Accepted: 06/12/2022] [Indexed: 03/17/2024]
Abstract
Electrical muscle stimulation (EMS) is widely used in rehabilitation and athletic training to generate involuntary muscle contractions. However, EMS leads to rapid muscle fatigue, limiting the force a muscle can produce during prolonged use. Currently available methods to monitor localized muscle fatigue and recovery are generally not compatible with EMS. The purpose of this study was to examine whether Doppler ultrasound imaging can assess changes in stimulated muscle twitches that are related to muscle fatigue from electrical stimulation. We stimulated five isometric muscle twitches in the medial and lateral gastrocnemius of 13 healthy subjects before and after a fatiguing EMS protocol. Tissue Doppler imaging of the medial gastrocnemius recorded muscle tissue velocities during each twitch. Features of the average muscle tissue velocity waveforms changed immediately after the fatiguing stimulation protocol (peak velocity: -38%, p = .022; time-to-zero velocity: +8%, p = .050). As the fatigued muscle recovered, the features of the average tissue velocity waveforms showed a return towards their baseline values similar to that of the normalized ankle torque. We also found that features of the average tissue velocity waveform could significantly predict the ankle twitch torque for each participant (R2 = 0.255-0.849, p < .001). Our results provide evidence that Doppler ultrasound imaging can detect changes in muscle tissue during isometric muscle twitch that are related to muscle fatigue, fatigue recovery, and the generated joint torque. Tissue Doppler imaging may be a feasible method to monitor localized muscle fatigue during EMS in a wearable device.
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Affiliation(s)
- Joseph A. Majdi
- Department of Bioengineering, George Mason University, Fairfax, Virginia, USA
- Center for Adaptive Systems of Brain–Body Interactions, George Mason University, Fairfax, Virginia, USA
| | - Samuel A. Acuña
- Department of Bioengineering, George Mason University, Fairfax, Virginia, USA
- Center for Adaptive Systems of Brain–Body Interactions, George Mason University, Fairfax, Virginia, USA
| | - Parag V. Chitnis
- Department of Bioengineering, George Mason University, Fairfax, Virginia, USA
- Center for Adaptive Systems of Brain–Body Interactions, George Mason University, Fairfax, Virginia, USA
| | - Siddhartha Sikdar
- Department of Bioengineering, George Mason University, Fairfax, Virginia, USA
- Center for Adaptive Systems of Brain–Body Interactions, George Mason University, Fairfax, Virginia, USA
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Schaefer LV, Bittmann FN. Case Study: Intra- and Interpersonal Coherence of Muscle and Brain Activity of Two Coupled Persons during Pushing and Holding Isometric Muscle Action. Brain Sci 2022; 12:703. [PMID: 35741589 PMCID: PMC9221481 DOI: 10.3390/brainsci12060703] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 05/19/2022] [Accepted: 05/24/2022] [Indexed: 02/04/2023] Open
Abstract
Inter-brain synchronization is primarily investigated during social interactions but had not been examined during coupled muscle action between two persons until now. It was previously shown that mechanical muscle oscillations can develop coherent behavior between two isometrically interacting persons. This case study investigated if inter-brain synchronization appears thereby, and if differences of inter- and intrapersonal muscle and brain coherence exist regarding two different types of isometric muscle action. Electroencephalography (EEG) and mechanomyography/mechanotendography (MMG/MTG) of right elbow extensors were recorded during six fatiguing trials of two coupled isometrically interacting participants (70% MVIC). One partner performed holding and one pushing isometric muscle action (HIMA/PIMA; tasks changed). The wavelet coherence of all signals (EEG, MMG/MTG, force, ACC) were analyzed intra- and interpersonally. The five longest coherence patches in 8−15 Hz and their weighted frequency were compared between real vs. random pairs and between HIMA vs. PIMA. Real vs. random pairs showed significantly higher coherence for intra-muscle, intra-brain, and inter-muscle-brain activity (p < 0.001 to 0.019). Inter-brain coherence was significantly higher for real vs. random pairs for EEG of right and central areas and for sub-regions of EEG left (p = 0.002 to 0.025). Interpersonal muscle-brain synchronization was significantly higher than intrapersonal one, whereby it was significantly higher for HIMA vs. PIMA. These preliminary findings indicate that inter-brain synchronization can arise during muscular interaction. It is hypothesized both partners merge into one oscillating neuromuscular system. The results reinforce the hypothesis that HIMA is characterized by more complex control strategies than PIMA. The pilot study suggests investigating the topic further to verify these results on a larger sample size. Findings could contribute to the basic understanding of motor control and is relevant for functional diagnostics such as the manual muscle test which is applied in several disciplines, e.g., neurology, physiotherapy.
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Affiliation(s)
- Laura V. Schaefer
- Devision of Regulative Physiology and Prevention, Department of Sport and Health Sciences, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany;
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Lin TC, Krishnan AU, Li Z. Intuitive, Efficient and Ergonomic Tele-Nursing Robot Interfaces: Design Evaluation and Evolution. ACM TRANSACTIONS ON HUMAN-ROBOT INTERACTION 2022. [DOI: 10.1145/3526108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Tele-nursing robots provide a safe approach for patient-caring in quarantine areas. For effective nurse-robot collaboration, ergonomic teleoperation and intuitive interfaces with low physical and cognitive workload must be developed. We propose a framework to evaluate the control interfaces to iteratively develop an intuitive, efficient, and ergonomic teleoperation interface. The framework is a hierarchical procedure that incorporates general to specific assessment and its role in design evolution. We first present pre-defined objective and subjective metrics used to evaluate three representative contemporary teleoperation interfaces. The results indicate that teleoperation via human motion mapping outperforms the gamepad and stylus interfaces. The trade-off with using motion mapping as a teleoperation interface is the non-trivial physical fatigue. To understand the impact of heavy physical demand during motion mapping teleoperation, we propose an objective assessment of physical workload in teleoperation using electromyography (EMG). We find that physical fatigue happens in the actions that involve precise manipulation and steady posture maintenance. We further implemented teleoperation assistance in the form of shared autonomy to eliminate the fatigue-causing component in robot teleoperation via motion mapping. The experimental results show that the autonomous feature effectively reduces the physical effort while improving the efficiency and accuracy of the teleoperation interface.
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Affiliation(s)
- Tsung-Chi Lin
- Worcester Polytechnic Institute, Robotics Engineering
| | | | - Zhi Li
- Worcester Polytechnic Institute, Robotics Engineering
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Dech S, Bittmann FN, Schaefer LV. Muscle oxygenation and time to task failure of submaximal holding and pulling isometric muscle actions and influence of intermittent voluntary muscle twitches. BMC Sports Sci Med Rehabil 2022; 14:55. [PMID: 35354469 PMCID: PMC8966203 DOI: 10.1186/s13102-022-00447-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 03/23/2022] [Indexed: 08/30/2023]
Abstract
Background Isometric muscle actions can be performed either by initiating the action, e.g., pulling on an immovable resistance (PIMA), or by reacting to an external load, e.g., holding a weight (HIMA). In the present study, it was mainly examined if these modalities could be differentiated by oxygenation variables as well as by time to task failure (TTF). Furthermore, it was analyzed if variables are changed by intermittent voluntary muscle twitches during weight holding (Twitch). It was assumed that twitches during a weight holding task change the character of the isometric muscle action from reacting (≙ HIMA) to acting (≙ PIMA). Methods Twelve subjects (two drop outs) randomly performed two tasks (HIMA vs. PIMA or HIMA vs. Twitch, n = 5 each) with the elbow flexors at 60% of maximal torque maintained until muscle failure with each arm. Local capillary venous oxygen saturation (SvO2) and relative hemoglobin amount (rHb) were measured by light spectrometry. Results Within subjects, no significant differences were found between tasks regarding the behavior of SvO2 and rHb, the slope and extent of deoxygenation (max. SvO2 decrease), SvO2 level at global rHb minimum, and time to SvO2 steady states. The TTF was significantly longer during Twitch and PIMA (incl. Twitch) compared to HIMA (p = 0.043 and 0.047, respectively). There was no substantial correlation between TTF and maximal deoxygenation independently of the task (r = − 0.13). Conclusions HIMA and PIMA seem to have a similar microvascular oxygen and blood supply. The supply might be sufficient, which is expressed by homeostatic steady states of SvO2 in all trials and increases in rHb in most of the trials. Intermittent voluntary muscle twitches might not serve as a further support but extend the TTF. A changed neuromuscular control is discussed as possible explanation. Supplementary Information The online version contains supplementary material available at 10.1186/s13102-022-00447-9.
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Affiliation(s)
- Silas Dech
- Department of Sport and Health Sciences, Regulative Physiology and Prevention, Human Science Faculty, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14479, Potsdam, Germany.
| | - Frank N Bittmann
- Department of Sport and Health Sciences, Regulative Physiology and Prevention, Human Science Faculty, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14479, Potsdam, Germany
| | - Laura V Schaefer
- Department of Sport and Health Sciences, Regulative Physiology and Prevention, Human Science Faculty, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14479, Potsdam, Germany
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Zhao H, Nishioka T, Okada J. Validity of using perceived exertion to assess muscle fatigue during resistance exercises. PeerJ 2022; 10:e13019. [PMID: 35251786 PMCID: PMC8896022 DOI: 10.7717/peerj.13019] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 02/07/2022] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND The rating of perceived exertion (RPE) is correlated with physiological variables. The purpose of this study was to assess the validity of using the Borg CR-10 scale and velocity to predict muscle fatigue assessed by surface electromyography during single joint resistance exercises. METHODS Fifteen healthy males underwent different fatigue levels of unilateral elbow flexion (EF) and knee extension (KE), consisting of low, medium, and high volumes at 65% of their one-repetition maximum. The RPEs, spectral fatigue index (SFI), and mean velocity of the experimental exercises were assessed throughout the trials. RESULTS Significant differences in overall RPE (p < 0.001) and average SFI (p < 0.001) were observed between the conditions in both exercises. Significant changes in RPE and SFI (p < 0.001) were observed throughout the EF, whereas a SFI increase (p < 0.001) was only observed at the end point of KE. Multiple regression analyses revealed two significant models (p < 0.001) for the prediction of muscle fatigue during EF (R2 = 0.552) and KE (R2 = 0.377). CONCLUSIONS Muscle fatigue resulted in similar increases in perceptual responses, demonstrating that RPE is useful for assessing fatigue when resistance exercise is performed. However, velocity changes may not reflect muscle fatigue correctly when exercise is no longer performed in an explosive manner. We recommend combining RPE responses with velocity changes to comprehensively assess muscle fatigue during clinical and sports situations.
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Affiliation(s)
- Hanye Zhao
- Graduate School of Sport Sciences, Waseda University, Tokorozawa, Saitama, Japan
| | - Takuya Nishioka
- Graduate School of Sport Sciences, Waseda University, Tokorozawa, Saitama, Japan
| | - Junichi Okada
- Faculty of Sport Sciences, Waseda University, Tokorozawa, Saitama, Japan
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Zhang Q, Iyer A, Lambeth K, Kim K, Sharma N. Ultrasound Echogenicity as an Indicator of Muscle Fatigue during Functional Electrical Stimulation. SENSORS 2022; 22:s22010335. [PMID: 35009875 PMCID: PMC8749646 DOI: 10.3390/s22010335] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 12/10/2021] [Accepted: 12/31/2021] [Indexed: 12/02/2022]
Abstract
Functional electrical stimulation (FES) is a potential neurorehabilitative intervention to enable functional movements in persons with neurological conditions that cause mobility impairments. However, the quick onset of muscle fatigue during FES is a significant challenge for sustaining the desired functional movements for more extended periods. Therefore, a considerable interest still exists in the development of sensing techniques that reliably measure FES-induced muscle fatigue. This study proposes to use ultrasound (US) imaging-derived echogenicity signal as an indicator of FES-induced muscle fatigue. We hypothesized that the US-derived echogenicity signal is sensitive to FES-induced muscle fatigue under isometric and dynamic muscle contraction conditions. Eight non-disabled participants participated in the experiments, where FES electrodes were applied on their tibialis anterior (TA) muscles. During a fatigue protocol under either isometric and dynamic ankle dorsiflexion conditions, we synchronously collected the isometric dorsiflexion torque or dynamic dorsiflexion angle on the ankle joint, US echogenicity signals from TA muscle, and the applied stimulation intensity. The experimental results showed an exponential reduction in the US echogenicity relative change (ERC) as the fatigue progressed under the isometric (R2=0.891±0.081) and dynamic (R2=0.858±0.065) conditions. The experimental results also implied a strong linear relationship between US ERC and TA muscle fatigue benchmark (dorsiflexion torque or angle amplitude), with R2 values of 0.840±0.054 and 0.794±0.065 under isometric and dynamic conditions, respectively. The findings in this study indicate that the US echogenicity signal is a computationally efficient signal that strongly represents FES-induced muscle fatigue. Its potential real-time implementation to detect fatigue can facilitate an FES closed-loop controller design that considers the FES-induced muscle fatigue.
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Affiliation(s)
- Qiang Zhang
- UNC/NCSU Joint Department of Biomedical Engineering, North Carolina State University, Raleigh, NC 27695, USA; (Q.Z.); (A.I.); (K.L.)
- UNC/NCSU Joint Department of Biomedical Engineering, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA
| | - Ashwin Iyer
- UNC/NCSU Joint Department of Biomedical Engineering, North Carolina State University, Raleigh, NC 27695, USA; (Q.Z.); (A.I.); (K.L.)
- UNC/NCSU Joint Department of Biomedical Engineering, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA
| | - Krysten Lambeth
- UNC/NCSU Joint Department of Biomedical Engineering, North Carolina State University, Raleigh, NC 27695, USA; (Q.Z.); (A.I.); (K.L.)
- UNC/NCSU Joint Department of Biomedical Engineering, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA
| | - Kang Kim
- The Department of Bioengineering, School of Engineering, University of Pittsburgh, Pittsburgh, PA 15260, USA;
- The Center for Ultrasound Molecular Imaging and Therapeutics, Department of Medicine and Heart and Vascular Institute, University of Pittsburgh School of Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA 15213, USA
- The Department of Mechanical Engineering and Materials Science, School of Engineering, University of Pittsburgh, Pittsburgh, PA 15260, USA
- The McGowan Institute for Regenerative Medicine, University of Pittsburgh Medical Center, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Nitin Sharma
- UNC/NCSU Joint Department of Biomedical Engineering, North Carolina State University, Raleigh, NC 27695, USA; (Q.Z.); (A.I.); (K.L.)
- UNC/NCSU Joint Department of Biomedical Engineering, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA
- Correspondence: ; Tel.: +1-919-513-0787
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Zhang Q, Iyer A, Lambeth K, Kim K, Sharma N. Ultrasound Echogenicity-based Assessment of Muscle Fatigue During Functional Electrical Stimulation. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2021; 2021:5948-5952. [PMID: 34892473 DOI: 10.1109/embc46164.2021.9630325] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The rapid onset of muscle fatigue during functional electrical stimulation (FES) is a major challenge when attempting to perform long-term periodic tasks such as walking. Surface electromyography (sEMG) is frequently used to detect muscle fatigue for both volitional and FES-evoked muscle contraction. However, sEMG contamination from both FES stimulation artifacts and residual M-wave signals requires sophisticated processing to get clean signals and evaluate the muscle fatigue level. The objective of this paper is to investigate the feasibility of computationally efficient ultrasound (US) echogenicity as a candidate indicator of FES-induced muscle fatigue. We conducted isometric and dynamic ankle dorsiflexion experiments with electrically stimulated tibialis anterior (TA) muscle on three human participants. During a fatigue protocol, we synchronously recorded isometric dorsiflexion force, dynamic dorsiflexion angle, US images, and stimulation intensity. The temporal US echogenicity from US images was calculated based on a gray-scaled analysis to assess the decrease in dorsiflexion force or motion range due to FES-induced TA muscle fatigue. The results showed a monotonic reduction in US echogenicity change along with the fatigue progression for both isometric (R2 =0.870±0.026) and dynamic (R2 =0.803±0.048) ankle dorsiflexion. These results implied a strong linear relationship between US echogenicity and TA muscle fatigue level. The findings indicate that US echogenicity may be a promising computationally efficient indicator for assessing FES-induced muscle fatigue and may aid in the design of muscle-in-the-loop FES controllers that consider the onset of muscle fatigue.
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Dech S, Bittmann FN, Schaefer LV. Muscle Oxygenation Level Might Trigger the Regulation of Capillary Venous Blood Filling during Fatiguing Isometric Muscle Actions. Diagnostics (Basel) 2021; 11:1973. [PMID: 34829320 PMCID: PMC8621102 DOI: 10.3390/diagnostics11111973] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 10/19/2021] [Accepted: 10/19/2021] [Indexed: 01/14/2023] Open
Abstract
The regulation of oxygen and blood supply during isometric muscle actions is still unclear. Recently, two behavioral types of oxygen saturation (SvO2) and relative hemoglobin amount (rHb) in venous microvessels were described during a fatiguing holding isometric muscle action (HIMA) (type I: nearly parallel behavior of SvO2 and rHb; type II: partly inverse behavior). The study aimed to ascertain an explanation of these two regulative behaviors. Twelve subjects performed one fatiguing HIMA trial with each arm by weight holding at 60% of the maximal voluntary isometric contraction (MVIC) in a 90° elbow flexion. Six subjects additionally executed one fatiguing PIMA trial by pulling on an immovable resistance with 60% of the MVIC with each side and same position. Both regulative types mentioned were found during HIMA (I: n = 7, II: n = 17) and PIMA (I: n = 3, II: n = 9). During the fatiguing measurements, rHb decreased initially and started to increase in type II at an average SvO2-level of 58.75 ± 2.14%. In type I, SvO2 never reached that specific value during loading. This might indicate the existence of a threshold around 59% which seems to trigger the increase in rHb and could explain the two behavioral types. An approach is discussed to meet the apparent incompatibility of an increased capillary blood filling (rHb) despite high intramuscular pressures which were found by other research groups during isometric muscle actions.
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Affiliation(s)
- Silas Dech
- Devision of Regulative Physiology and Prevention, Department of Sports and Health Sciences, University of Potsdam, 14476 Potsdam, Germany; (F.N.B.); (L.V.S.)
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Zemková E, Cepková A, Muyor JM. The association of reactive balance control and spinal curvature under lumbar muscle fatigue. PeerJ 2021; 9:e11969. [PMID: 34434668 PMCID: PMC8362667 DOI: 10.7717/peerj.11969] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 07/23/2021] [Indexed: 11/30/2022] Open
Abstract
Background Although low back fatigue is an important intervening factor for physical functioning among sedentary people, little is known about its possible significance in relation to the spinal posture and compensatory postural responses to unpredictable stimuli. This study investigates the effect of lumbar muscle fatigue on spinal curvature and reactive balance control in response to externally induced perturbations. Methods A group of 38 young sedentary individuals underwent a perturbation-based balance test by applying a 2 kg load release. Sagittal spinal curvature and pelvic tilt was measured in both a normal and Matthiass standing posture both with and without a hand-held 2 kg load, and before and after the Sørensen fatigue test. Results Both the peak anterior and peak posterior center of pressure (CoP) displacements and the corresponding time to peak anterior and peak posterior CoP displacements significantly increased after the Sørensen fatigue test (all at p < 0.001). A lumbar muscle fatigue led to a decrease of the lumbar lordosis in the Matthiass posture while holding a 2 kg load in front of the body when compared to pre-fatigue conditions both without a load (p = 0.011, d = 0.35) and with a 2 kg load (p = 0.000, d = 0.51). Also the sacral inclination in the Matthiass posture with a 2 kg additional load significantly decreased under fatigue when compared to all postures in pre-fatigue conditions (p = 0.01, d = 0.48). Contrary to pre-fatigue conditions, variables of the perturbation-based balance test were closely associated with those of lumbar curvature while standing in the Matthiass posture with a 2 kg additional load after the Sørensen fatigue test (r values in range from −0.520 to −0.631, all at p < 0.05). Conclusion These findings indicate that lumbar muscle fatigue causes changes in the lumbar spinal curvature and this is functionally relevant in explaining the impaired ability to maintain balance after externally induced perturbations. This emphasizes the importance for assessing both spinal posture and reactive balance control under fatigue in order to reveal their interrelations in young sedentary adults and predict any significant deterioration in later years.
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Affiliation(s)
- Erika Zemková
- Department of Biological and Medical Sciences, Faculty of Physical Education and Sport, Comenius University Bratislava, Bratislava, Slovakia.,Sports Technology Institute, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, Bratislava, Slovakia
| | - Alena Cepková
- Centre of Languages and Sports, Faculty of Mechanical Engineering, Slovak University of Technology, Bratislava, Slovakia
| | - José M Muyor
- Laboratory of Kinesiology, Biomechanics and Ergonomics, Health Research Centre, University of Almería, Almería, Spain
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Naeem J, Hamzaid NA, Azman AW, Bijak M. Electrical stimulator with mechanomyography-based real-time monitoring, muscle fatigue detection, and safety shut-off: a pilot study. ACTA ACUST UNITED AC 2021; 65:461-468. [PMID: 32304295 DOI: 10.1515/bmt-2019-0191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 01/07/2020] [Indexed: 11/15/2022]
Abstract
Functional electrical stimulation (FES) has been used to produce force-related activities on the paralyzed muscle among spinal cord injury (SCI) individuals. Early muscle fatigue is an issue in all FES applications. If not properly monitored, overstimulation can occur, which can lead to muscle damage. A real-time mechanomyography (MMG)-based FES system was implemented on the quadriceps muscles of three individuals with SCI to generate an isometric force on both legs. Three threshold drop levels of MMG-root mean square (MMG-RMS) feature (thr50, thr60, and thr70; representing 50%, 60%, and 70% drop from initial MMG-RMS values, respectively) were used to terminate the stimulation session. The mean stimulation time increased when the MMG-RMS drop threshold increased (thr50: 22.7 s, thr60: 25.7 s, and thr70: 27.3 s), indicating longer sessions when lower performance drop was allowed. Moreover, at thr70, the torque dropped below 50% from the initial value in 14 trials, more than at thr50 and thr60. This is a clear indication of muscle fatigue detection using the MMG-RMS value. The stimulation time at thr70 was significantly longer (p = 0.013) than that at thr50. The results demonstrated that a real-time MMG-based FES monitoring system has the potential to prevent the onset of critical muscle fatigue in individuals with SCI in prolonged FES sessions.
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Affiliation(s)
- Jannatul Naeem
- Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Nur Azah Hamzaid
- Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Amelia Wong Azman
- Department of Electrical and Computer Engineering, Faculty of Engineering, International Islamic University Malaysia, Kuala Lumpur 53100, Malaysia
| | - Manfred Bijak
- Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
- Medical University Vienna, Center for Medical Physics and Biomedical Engineering, Vienna, Austria
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Di Giminiani R, Cardinale M, Ferrari M, Quaresima V. Validation of Fabric-Based Thigh-Wearable EMG Sensors and Oximetry for Monitoring Quadriceps Activity during Strength and Endurance Exercises. SENSORS 2020; 20:s20174664. [PMID: 32824976 PMCID: PMC7506815 DOI: 10.3390/s20174664] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 08/13/2020] [Accepted: 08/17/2020] [Indexed: 12/19/2022]
Abstract
Muscle oximetry based on near-infrared spectroscopy (NIRS) and electromyography (EMG) techniques in adherent clothing might be used to monitor the muscular activity of selected muscle groups while exercising. The fusion of these wearable technologies in sporting garments can allow the objective assessment of the quality and the quantity of the muscle activity as well as the continuous monitoring of exercise programs. Several prototypes integrating EMG and NIRS have been developed previously; however, most devices presented the limitations of not measuring regional muscle oxyhemoglobin saturation and did not embed textile sensors for EMG. The purpose of this study was to compare regional muscle oxyhemoglobin saturation and surface EMG data, measured under resting and dynamic conditions (treadmill run and strength exercises) by a recently developed wearable integrated quadriceps muscle oximetry/EMG system adopting smart textiles for EMG, with those obtained by using two "gold standard" commercial instrumentations for EMG and muscle oximetry. The validity and agreement between the wearable integrated muscle oximetry/EMG system and the "gold standard" instrumentations were assessed by using the Bland-Altman agreement plots to determine the bias. The results support the validity of the data provided by the wearable electronic garment developed purposely for the quadriceps muscle group and suggest the potential of using such device to measure strength and endurance exercises in vivo in various populations.
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Affiliation(s)
- Riccardo Di Giminiani
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, 67100 L’Aquila, Italy
- Correspondence: ; Tel.: +39-347-6245514
| | - Marco Cardinale
- Aspetar Orthopaedic and Sports Medicine Hospital, Doha PO Box 29222, Qatar;
- Department of Computer Science and Institute of Sport, Exercise and Health, University College London, London WC1E 6BS, UK
| | - Marco Ferrari
- Department of Life, Health and Environmental Sciences, University of L’Aquila, 67100 L’Aquila, Italy; (M.F.); (V.Q.)
| | - Valentina Quaresima
- Department of Life, Health and Environmental Sciences, University of L’Aquila, 67100 L’Aquila, Italy; (M.F.); (V.Q.)
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AlMohimeed I, Ono Y. Ultrasound Measurement of Skeletal Muscle Contractile Parameters Using Flexible and Wearable Single-Element Ultrasonic Sensor. SENSORS 2020; 20:s20133616. [PMID: 32605006 PMCID: PMC7374409 DOI: 10.3390/s20133616] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 06/17/2020] [Accepted: 06/23/2020] [Indexed: 12/25/2022]
Abstract
Skeletal muscle is considered as a near-constant volume system, and the contractions of the muscle are related to the changes in tissue thickness. Assessment of the skeletal muscle contractile parameters such as maximum contraction thickness (Th), contraction time (Tc), contraction velocity (Vc), sustain time (Ts), and half-relaxation (Tr) provides valuable information for various medical applications. This paper presents a single-element wearable ultrasonic sensor (WUS) and a method to measure the skeletal muscle contractile parameters in A-mode ultrasonic data acquisition. The developed WUS was made of double-layer polyvinylidene fluoride (PVDF) piezoelectric polymer films with a simple and low-cost fabrication process. A flexible, lightweight, thin, and small size WUS would provide a secure attachment to the skin surface without affecting the muscle contraction dynamics of interest. The developed WUS was employed to monitor the contractions of gastrocnemius (GC) muscle of a human subject. The GC muscle contractions were evoked by the electrical muscle stimulation (EMS) at varying EMS frequencies from 2 Hz up to 30 Hz. The tissue thickness changes due to the muscle contractions were measured by utilizing a time-of-flight method in the ultrasonic through-transmission mode. The developed WUS demonstrated the capability to monitor the tissue thickness changes during the unfused and fused tetanic contractions. The tetanic progression level was quantitatively assessed using the parameter of the fusion index (FI) obtained. In addition, the contractile parameters (Th, Tc, Vc, Ts, and Tr) were successfully extracted from the measured tissue thickness changes. In addition, the unfused and fused tetanus frequencies were estimated from the obtained FI-EMS frequency curve. The WUS and ultrasonic method proposed in this study could be a valuable tool for inexpensive, non-invasive, and continuous monitoring of the skeletal muscle contractile properties.
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Affiliation(s)
- Ibrahim AlMohimeed
- Department of Systems and Computer Engineering, Carleton University, Ottawa, ON K1S 5B6, Canada;
- Department of Medical Equipment Technology, Majmaah University, Majmaah 11952, Saudi Arabia
| | - Yuu Ono
- Department of Systems and Computer Engineering, Carleton University, Ottawa, ON K1S 5B6, Canada;
- Correspondence:
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Sheng Z, Sharma N, Kim K. Ultra-High-Frame-Rate Ultrasound Monitoring of Muscle Contractility Changes Due to Neuromuscular Electrical Stimulation. Ann Biomed Eng 2020; 49:262-275. [PMID: 32483747 DOI: 10.1007/s10439-020-02536-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 05/14/2020] [Indexed: 10/24/2022]
Abstract
The quick onset of muscle fatigue is a critical issue when applying neuromuscular electrical stimulation (NMES) to generate muscle contractions for functional limb movements, which were lost/impaired due to a neurological disorder or an injury. For in situ assessment of the effect of NMES-induced muscle fatigue, a novel noninvasive sensor modality that can quantify the degraded contractility of a targeted muscle is required. In this study, instantaneous strain maps of a contracting muscle were derived from ultra-high-frame-rate (2 kHz) ultrasound images to quantify the contractility. A correlation between strain maps and isometric contraction force values was investigated. When the muscle reached its maximum contraction, the maximum and the mean values of the strain map were correlated with the force values and were further used to stage the contractility change. During the muscle activation period, a novel methodology based on the principal component regression (PCR) was proposed to explore the strain-force correlation. The quadriceps muscle of 3 able-bodied human participants was investigated during NMES-elicited isometric knee extension experiments. Strong to very strong correlation results were obtained and indicate that the proposed measurements from ultrasound images are promising to quantify the muscle contractility changes during NMES.
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Affiliation(s)
- Zhiyu Sheng
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh School of Engineering, Pittsburgh, PA, 15261, USA
| | - Nitin Sharma
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh School of Engineering, Pittsburgh, PA, 15261, USA. .,Department of Bioengineering, University of Pittsburgh School of Engineering, Pittsburgh, PA, 15261, USA. .,Joint Department of Biomedical Engineering, North Carolina State University, Raleigh, NC, 27606, USA. .,Clinical and Translational Science Institute, University of Pittsburgh, Pittsburgh, PA, 15261, USA.
| | - Kang Kim
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh School of Engineering, Pittsburgh, PA, 15261, USA. .,Department of Bioengineering, University of Pittsburgh School of Engineering, Pittsburgh, PA, 15261, USA. .,Center for Ultrasound Molecular Imaging and Therapeutics, Department of Medicine and Heart and Vascular Institute, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, PA, 15261, USA. .,McGowan Institute for Regenerative Medicine, University of Pittsburgh and University of Pittsburgh Medical Center, Pittsburgh, PA, 15219, USA.
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Exercise-Induced Hemodynamic Changes in Muscle Tissue: Implication of Muscle Fatigue. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10103512] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
This research aims to investigate the development of muscle fatigue and the recovery process revealed by tissue oxygenation. The tissue hemodynamics were measured by near-infrared spectroscopy (NIRS) during a 30-min pre-exercise rest, a 40-cycle heel-lift exercise and a 30-min post-exercise recovery. Wavelet transform was used to obtain the normalized wavelet energy in six frequency intervals (I–VI) and inverse wavelet transform was applied to extract exercise-induced oscillations from the hemodynamic signals. During the exercise phase, the contraction-related oscillations in the total hemoglobin signal (ΔtHb) showed a decreasing trend while the fluctuations in the tissue oxygenation index (TOI) displayed an increasing tendency. The mean TOI value was significantly higher (p < 0.001) under recovery (65.04% ± 2.90%) than that under rest (62.35% ± 3.05%). The normalized wavelet energy of the ΔtHb signal in frequency intervals I (p < 0.001), II (p < 0.05), III (p < 0.05) and IV (p < 0.01) significantly increased by 43.4%, 23.6%, 18.4% and 21.6% during the recovery than that during the pre-exercise rest, while the value in interval VI (p < 0.05) significantly decreased by 16.6%. It could be concluded that NIRS-derived hemodynamic signals can provide valuable information related to muscle fatigue and recovery.
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Ekström L, Zhang Q, Abrahamson J, Beck J, Johansson C, Westin O, Todd C, Baranto A. A model for evaluation of the electric activity and oxygenation in the erector spinae muscle during isometric loading adapted for spine patients. J Orthop Surg Res 2020; 15:155. [PMID: 32303232 PMCID: PMC7165389 DOI: 10.1186/s13018-020-01652-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 03/27/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Simultaneous measurement of electromyography (EMG) and local muscle oxygenation is proposed in an isometric loading model adjusted for patients that have undergone spinal surgery. METHODS Twelve patients with degenerative lumbar spinal stenosis (DLSS) were included. They were subjected to a test protocol before and after surgery. The protocol consisted of two parts, a dynamic and an isometric Ito loading with a time frame of 60 s and accompanying rest of 120 s. The Ito test was repeated three times. EMG was measured bilaterally at the L4 level and L2 and was recorded using surface electrodes and collected (Biopac Systems Inc.). EMG signal was expressed as RMS and median frequency (MF). Muscle tissue oxygen saturation (MrSO2) was monitored using a near-infrared spectroscopy (NIRS) device (INVOS® 5100C Oxymeter). Two NIRS sensors were positioned bilaterally at the L4 level. The intensity of the leg and back pain and perceived exertion before, during, and after the test was evaluated with a visual analogue scale (VAS) and Borg RPE-scale, respectively. RESULTS All patients were able to perform and complete the test protocol pre- and postoperatively. A consistency of lower median and range values was noted in the sensors of EMG1 (15.3 μV, range 4.5-30.7 μV) and EMG2 (13.6 μV, range 4.0-46.5 μV) that were positioned lateral to NIRS sensors at L4 compared with EMG3 (18.9 μV, range 6.5-50.0 μV) and EMG4 (20.4 μV, range 7.5-49.0 μV) at L2. Right and left side of the erector spinae exhibited a similar electrical activity behaviour over time during Ito test (60 s). Regional MrSO2 decreased over time during loading and returned to the baseline level during recovery on both left and right side. Both low back and leg pain was significantly reduced postoperatively. CONCLUSION Simultaneous measurement of surface EMG and NIRS seems to be a promising tool for objective assessment of paraspinal muscle function in terms of muscular activity and local muscle oxygenation changes in response to isometric trunk extension in patients that have undergone laminectomy for spinal stenosis.
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Affiliation(s)
- Lars Ekström
- Institute of Clinical Sciences, Department of Orthopedics, Sahlgrenska Academy, University of Gothenburg and Sahlgrenska University Hospital, R-House, Floor 7, SE-431 80 Mölndal, Gothenburg, Sweden.
| | - Qiuxia Zhang
- Institute of Clinical Sciences, Department of Orthopedics, Sahlgrenska Academy, University of Gothenburg and Sahlgrenska University Hospital, R-House, Floor 7, SE-431 80 Mölndal, Gothenburg, Sweden
| | - Josefin Abrahamson
- Institute of Clinical Sciences, Department of Orthopedics, Sahlgrenska Academy, University of Gothenburg and Sahlgrenska University Hospital, R-House, Floor 7, SE-431 80 Mölndal, Gothenburg, Sweden
| | - Joel Beck
- Institute of Clinical Sciences, Department of Orthopedics, Sahlgrenska Academy, University of Gothenburg and Sahlgrenska University Hospital, R-House, Floor 7, SE-431 80 Mölndal, Gothenburg, Sweden
| | - Christer Johansson
- Institute of Clinical Sciences, Department of Orthopedics, Sahlgrenska Academy, University of Gothenburg and Sahlgrenska University Hospital, R-House, Floor 7, SE-431 80 Mölndal, Gothenburg, Sweden
| | - Olof Westin
- Institute of Clinical Sciences, Department of Orthopedics, Sahlgrenska Academy, University of Gothenburg and Sahlgrenska University Hospital, R-House, Floor 7, SE-431 80 Mölndal, Gothenburg, Sweden
| | - Carl Todd
- The Carl Todd Clinic, 5 Pickwick Park, Park Lane, Corsham, SN13 0HN, UK
| | - Adad Baranto
- Institute of Clinical Sciences, Department of Orthopedics, Sahlgrenska Academy, University of Gothenburg and Sahlgrenska University Hospital, R-House, Floor 7, SE-431 80 Mölndal, Gothenburg, Sweden
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Dech S, Bittmann F, Schaefer L. Behavior of oxygen saturation and blood filling in the venous capillary system of the biceps brachii muscle during a fatiguing isometric action. Eur J Transl Myol 2020; 30:8800. [PMID: 32499884 PMCID: PMC7254419 DOI: 10.4081/ejtm.2019.8800] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Accepted: 02/08/2020] [Indexed: 11/23/2022] Open
Abstract
The objective of the study was to develop a better understanding of the capillary circulation in contracting muscles. Ten subjects were measured during a submaximal fatiguing isometric muscle action by use of the O2C spectrophotometer. In all measurements the capillary-venous oxygen saturation of hemoglobin (SvO2) decreased immediately after the start of loading and leveled off into a steady state. However, two different patterns (type I and type II) emerged. They differed in the extent of deoxygenation (-10.37 ±2.59 percent points (pp) vs. -33.86 ±17.35 pp, p = .008) and the behavior of the relative hemoglobin amount (rHb). Type I revealed a positive rank correlation of SvO2 and rHb (ρ = 0.735, p <.001), whereas a negative rank correlation (ρ = -0.522, p <.001) occurred in type II, since rHb decreased until a reversal point, then increased averagely 13% above the baseline value and leveled off into a steady state. The results reveal that a homeostasis of oxygen delivery and consumption during isometric muscle actions is possible. A rough distinction in two types of regulation is suggested.
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Affiliation(s)
- Silas Dech
- Regulative Physiology and Prevention, Department of Sport and Health Sciences, University of Potsdam, Germany
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Kumamoto T, Seko T, Matsuda R, Miura S, Okumura T, Nitta S. Change in the circulation and activity of the lower erector spinae muscles after repeated trunk extension movement. J Back Musculoskelet Rehabil 2020; 32:931-936. [PMID: 31033459 DOI: 10.3233/bmr-181390] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND The optimum repetition number of standing back-extension exercise (SBEE) effective for the prevention and improvement of low back pain (LBP) is unknown. OBJECTIVE To determine the effect of physiotherapy on LBP by investigating the optimum repetition number of SBEE via optical analysis and electromyographic (EMG) examination of the multifidus muscles. METHODS Hemodynamics and multifidus muscle activity were examined in 16 healthy adult men using near-infrared spectroscopy and surface EMG after performing repetitive SBEE. RESULTS Oxidized hemoglobin (Oxy-Hb) levels significantly increased in the second extension phase but decreased in the third and subsequent extension phases; deoxidized hemoglobin (deOxy-Hb) levels increased in the third and subsequent extension phases. In the standing phase, no significant difference was observed; in the third and subsequent phases, Oxy-Hb levels decreased and deOxy-Hb levels increased. Muscular activity significantly decreased in the second standing phase but increased in the third and subsequent phases. No significant difference was observed in the extension phase with respect to the number of SBEE repetitions performed. In healthy individuals, hemodynamics improved up to second repetition of SBEE; subsequent repetitions may decrease hemodynamics because of increased activity of the multifidus muscles. CONCLUSIONS In healthy individuals, hemodynamics improved up to second repetition of SBEE.
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Affiliation(s)
- Tsuneo Kumamoto
- Department of Rehabilitation, Faculty of Health Science, Hokkaido Chitose College of Rehabilitation, Hokkaido 066-0055, Japan
| | - Toshiaki Seko
- Department of Rehabilitation, Faculty of Health Science, Hokkaido Chitose College of Rehabilitation, Hokkaido 066-0055, Japan
| | - Ryo Matsuda
- Department of Rehabilitation, Sinsapporo Neurosurgical Hospital, Sapporo, Hokkaido 004-0031, Japan
| | - Sayo Miura
- Department of Rehabilitation, Hokusei Hospital, Hokkaido 066-0081, Japan
| | | | - Sinnosuke Nitta
- Department of Rehabilitation, Oowada Hospital, Saitama 337-0053, Japan
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Cè E, Longo S, Limonta E, Coratella G, Rampichini S, Esposito F. Peripheral fatigue: new mechanistic insights from recent technologies. Eur J Appl Physiol 2019; 120:17-39. [DOI: 10.1007/s00421-019-04264-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Accepted: 11/12/2019] [Indexed: 12/12/2022]
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Applications of Functional Near-Infrared Spectroscopy in Fatigue, Sleep Deprivation, and Social Cognition. Brain Topogr 2019; 32:998-1012. [DOI: 10.1007/s10548-019-00740-w] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Accepted: 10/18/2019] [Indexed: 01/05/2023]
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Mohamad Saadon NS, Hamzaid NA, Hasnan N, Dzulkifli MA, Davis GM. Electrically evoked wrist extensor muscle fatigue throughout repetitive motion as measured by mechanomyography and near-infrared spectroscopy. BIOMED ENG-BIOMED TE 2019; 64:439-448. [DOI: 10.1515/bmt-2018-0058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 08/06/2018] [Indexed: 11/15/2022]
Abstract
Abstract
Repetitive electrically-evoked muscle contraction leads to accelerated muscle fatigue. This study assessed electrically-evoked fatiguing muscle with changes to mechanomyography root mean square percentage (%RMS-MMG) and tissue saturation index (%TSI) in extensor carpi radialis. Forty healthy volunteers (n=40) performed repetitive electrical-evoked wrist extension to fatigue and results were analyzed pre- and post-fatigue, i.e. 50% power output (%PO) drop. Responses of %PO, %TSI and %RMS-MMG were correlated while the relationships between %RMS-MMG and %TSI were investigated using linear regression. The %TSI for both groups were negatively correlated with declining %PO as the ability of the muscle to take up oxygen became limited due to fatigued muscle. The %RMS-MMG behaved in two different patterns post-fatigue against declining %PO whereby; (i) group A showed positive correlation (%RMS-MMG decreased) throughout the session and (ii) group B demonstrated negative correlation (%RMS-MMG increased) with declining %PO until the end of the session. Regression analysis showed %TSI was inversely proportional to %RMS-MMG during post-fatigue in group A. Small gradients in both groups suggested that %TSI was not sensitive to the changes in %RMS-MMG and they were mutually exclusive. Most correlation and regression changed significantly post-fatigue indicating that after fatigue, the condition of muscle had changed mechanically and physiologically.
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Lohr C, Schmidt T, Medina-Porqueres I, Braumann KM, Reer R, Porthun J. Diagnostic accuracy, validity, and reliability of Tensiomyography to assess muscle function and exercise-induced fatigue in healthy participants. A systematic review with meta-analysis. J Electromyogr Kinesiol 2019; 47:65-87. [DOI: 10.1016/j.jelekin.2019.05.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 03/16/2019] [Accepted: 05/03/2019] [Indexed: 02/04/2023] Open
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Evaluation of the Bourban Trunk Muscle Strength Test Based on Electromyographic Parameters. J Funct Morphol Kinesiol 2019; 4:jfmk4020035. [PMID: 33467350 PMCID: PMC7739280 DOI: 10.3390/jfmk4020035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 06/07/2019] [Accepted: 06/10/2019] [Indexed: 01/10/2023] Open
Abstract
(1) Background: The importance of a strong and stable trunk musculature is well known, but there is a lack of reliable, valid and objective test batteries with the necessary test economy, practicability and cost-benefit ratio. The aim of the present study was to evaluate the Bourban test for the validity of its exercise selection representing the ventral, right/left lateral and dorsal muscle chain. (2) Methods: 33 male sports students (24.1 ± 2.4 years, 181.6 ± 5.5 cm, 80.8 ± 7.3 kg) participated in the study. Median Frequency (MDF) and Mean Frequency (MNF) were calculated from the electromyographic signals and used to check whether fatigue of the suggested target musculature actually occurs during the different exercises and thus the exercise is representative for this part of the trunk. (3) Results: In all exercises significant fatigue was measured for MDF and MNF in the muscles working as agonists. (4) Conclusion: It can be stated that the Bourban trunk muscle strength test is a valid and economic test instrument for the evaluation of trunk strength (endurance). Compared to technically supported measuring systems, the Bourban test seems to be a flexible and cost-effective alternative for the broad mass.
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Sheng Z, Sharma N, Kim K. Quantitative Assessment of Changes in Muscle Contractility Due to Fatigue During NMES: An Ultrasound Imaging Approach. IEEE Trans Biomed Eng 2019; 67:832-841. [PMID: 31180832 DOI: 10.1109/tbme.2019.2921754] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE This paper investigates an ultrasound imaging-based non-invasive methodology to quantitatively assess changes in muscle contractility due to the fatigue induced by neuromuscular electrical stimulation (NMES). METHODS Knee extension experiments on human participants were conducted to record synchronized isometric knee force data and ultrasound images of the electrically stimulated quadriceps muscle. The data were first collected in a pre-fatigue stage and then in a post-fatigue stage. Ultrasound images were processed using a contraction rate adaptive speckle tracking algorithm. A two-dimensional strain measure field was constructed based on the muscle displacement tracking results to quantify muscle contractility. RESULTS Analysis of the strain images showed that, between the pre-fatigue and post-fatigue stages, there was a reduction in the strain peaks, a change in the strain peak distribution, and a decrease in an area occupied by the large positive strain. CONCLUSION The results indicate changes in muscle contractility due to the NMES-induced muscle fatigue. SIGNIFICANCE Ultrasound imaging with the proposed methodology is a promising tool for a direct NMES-induced fatigue assessment and facilitates new strategies to alleviate the effects of the NMES-induced fatigue.
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Liu J, Sheng Y, Zeng J, Liu H. Corticomuscular Coherence for Upper Arm Flexor and Extensor Muscles During Isometric Exercise and Cyclically Isokinetic Movement. Front Neurosci 2019; 13:522. [PMID: 31178688 PMCID: PMC6538811 DOI: 10.3389/fnins.2019.00522] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 05/06/2019] [Indexed: 01/27/2023] Open
Abstract
Cortical-muscular functional coupling reflects the interaction between the cerebral cortex and the muscle activities. Corticomuscular coherence (CMC) has been extensively revealed in sustained contractions of various upper- and lower-limb muscles during static and dynamic force outputs. However, it is not well-understood that the CMC modulation mechanisms, i.e., the relation between a cerebral hemisphere and dynamic motor controlling limbs at constant speeds, such as isokinetic movement. In this paper, we explore the CMC between upper arm flexors/extensors movement and motor cortex during isometric exercise and cyclically isokinetic movement. We also provide further insights of frequency-shift and the neural pathway mechanisms in isokinetic movement by evaluating the coherence between motor cortex and agonistic or antagonistic muscles. This study is the first to investigate the relationship between cortical-muscular functional connections in elbow flexion-extension movement with constant speeds. The result shows that gamma-range coherence for isokinetic movement is greatly increased compared with isometric exercise, and significant CMC is observed in the entire flexion-extension stage regardless the nature of muscles contraction, although dominant synchronization of cortical oscillation and muscular activity resonated in sustained contraction stage principally. Besides, the CMC for extensors and flexors are explicitly consistent in contraction stage during cyclically isokinetic elbow movement. It is concluded that cortical-muscular coherence can be dynamically modulated as well as selective by cognitive demands of the body, and the time-varying mechanisms of the synchronous motor oscillation exist in healthy individuals during dynamic movement.
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Affiliation(s)
- Jinbiao Liu
- State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Yixuan Sheng
- State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Jia Zeng
- State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Honghai Liu
- State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China
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McCully KK, Moraes C, Patel SV, Green M, Willingham TB. Muscle-Specific Endurance of the Lower Back Erectors Using Electrical Twitch Mechanomyography. J Funct Morphol Kinesiol 2019; 4:jfmk4010012. [PMID: 33467327 PMCID: PMC7739340 DOI: 10.3390/jfmk4010012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 01/22/2019] [Accepted: 01/23/2019] [Indexed: 11/30/2022] Open
Abstract
Lower back pain is a common symptom potentially associated with skeletal muscle dysfunction. The purpose of this study was to evaluate endurance in the lower back muscles of healthy participants using accelerometer-based mechanomyography. Methods: Young healthy subjects (N = 7) were tested. Surface electrodes and a tri-axial accelerometer were placed over the erector spinae muscle along the T11-L1 Vertebrae. Stimulation was for 3 min each at 2, 4, and 6 Hz, and changes in acceleration were used to calculate an endurance index (EI). Reproducibility of the endurance index measurements was tested on two separate days. Wrist flexor and vastus lateralis muscles were tested for comparison. Near Infrared Spectroscopy (NIRS) was used to measure muscle oxygen levels (O2Hb) (N = 5). EI was 70.3 + 13.4, 32.6 + 8.4, and 19.2 + 6.2% for 2, 4, 6 Hz, respectively. The coefficients of variation were 9.8, 13.9, and 20.3% for 2, 4, 6 Hz, respectively. EI values were lower in the erector spinae muscles compared to the arm and the leg (p < 0.05). O2Hb values were 86.4 + 10.9% at rest and were 77.2 + 15.5, 84.3 + 14.1, and 84.1 + 18.9% for 2, 4, 6 Hz, respectively (p > 0.05, all comparisons). An endurance index can be obtained from the lower back erectors muscles that is reproducible and not influenced by voluntary effort or muscle oxygen levels.
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Affiliation(s)
- Kevin K. McCully
- Department of Kinesiology, University of Georgia, Athens, GA 30602, USA
- Correspondence: ; Tel.: +1-706-542-1129
| | - Caio Moraes
- Department of Kinesiology, University of Georgia, Athens, GA 30602, USA
| | - Sahil V. Patel
- Department of Kinesiology, University of Georgia, Athens, GA 30602, USA
| | - Max Green
- AU-UGA Medical Partnership, Athens, GA 30606, USA
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Sung W, Wong A, Pourshogi A, Pourrezaei K, Silfies S. Near infrared spectroscopy confirms recruitment of specific lumbar extensors through neuromuscular electrical stimulation. Physiother Theory Pract 2018; 36:516-523. [DOI: 10.1080/09593985.2018.1488908] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Won Sung
- GSPP Penn Therapy and Fitness, Philadelphia, PA
| | - Ardy Wong
- School of Biomedical Engineering Science and Health Systems, Drexel University, Philadelphia, PA, USA
| | - Ahmad Pourshogi
- School of Biomedical Engineering Science and Health Systems, Drexel University, Philadelphia, PA, USA
- Rhyton Group, Tehran, Iran
| | - Kambiz Pourrezaei
- School of Biomedical Engineering Science and Health Systems, Drexel University, Philadelphia, PA, USA
| | - Sheri Silfies
- College of Nursing and Health Professionals, Drexel University, Philadelphia, PA, USA
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Jin S, An J, Lee S, Lee I, Kim HJ. NIRS-based experimental evaluation of driver back fatigue during long-term driving. BIOTECHNOL BIOTEC EQ 2018. [DOI: 10.1080/13102818.2018.1446763] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
Affiliation(s)
- SangHyeon Jin
- Convergence Research Center For Wellness, DGIST, Daegu, Republic of Korea
| | - Jinung An
- Convergence Research Center For Wellness, DGIST, Daegu, Republic of Korea
| | - SeungHyun Lee
- Convergence Research Center For Wellness, DGIST, Daegu, Republic of Korea
| | - Inju Lee
- The Central Research Institute, Hyundai Motor Company, Uiwang-si, Republic of Korea
| | - Hyung Joo Kim
- The Central Research Institute, Hyundai Motor Company, Uiwang-si, Republic of Korea
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Jun SW, Yong SJ, Jo M, Kim YH, Kim SH. Brief report: Preliminary study on evaluation of spasticity in patients with brain lesions using mechanomyography. Clin Biomech (Bristol, Avon) 2018. [PMID: 29522919 DOI: 10.1016/j.clinbiomech.2018.02.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND Electromyography and the modified Ashworth scale (MAS) are among the most effective methods for evaluating spasticity; however, these are often inappropriate for clinical use, owing to the complicated procedure and subjective evaluation outcomes. METHODS A passive stretch reflex test was performed on 10 subjects with brain lesions. Furthermore, mechanomyography and electromyography were conducted on the vastus lateralis muscle (agonist) and semitendinosus muscle (antagonist) of the subjects with brain lesions. A new equation to define the normalized hull area; that is, the mechanomyography (MMG) ratio, was applied to quantify the triaxial motion of the agonist muscle versus antagonist muscles, reflecting the electromyographic firing point of the spastic muscle. FINDINGS The MMG ratio was proposed, which statistically distinguishes the spastic and normal muscles (p = 0.01) and exhibits a concordance with the conventional mean MAS (r = 0.69, p = 0.01). INTERPRETATION Patients suspected to have spasticity of 0 to 1+ grade can be quantitatively evaluated using the normalized hull area ratio, which can be used as an additional clinical indicator for spasticity evaluation. REGISTRATION OF CLINICAL TRIALS The study was conducted in conformity with the Helsinki declaration principles and performed in the Korea Centers for Disease Control and Prevention, Ministry of Health and Welfare (Republic of Korea); 2010; KCT0002385; A new approach of spasticity measurement using mechanomyography in patients with brain lesions: A randomized pilot study for a parallel randomized controlled trial; October 8, 2015 [Cited on July 21, 2017]; [1 screen]. Available from: https://cris.nih.go.kr/cris/search/search_result_st01_en.jsp?seq=7805<ype=&rtype=.
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Affiliation(s)
- Sang Woo Jun
- Department of Biomedical Clinical Engineering, Yonsei University Wonju College of Medicine, Wonju Severance Christian Hospital, 20 Ilsan-ro, Wonju-si, Gangwon-do 26426, Republic of Korea
| | - Suk Joong Yong
- Department of Pulmonology, Yonsei Wonju College of Medicine, Wonju Severance Christian Hospital, 20 Ilsan-ro, Wonju-si, Gangwon-do 26426, Republic of Korea
| | - Min Jo
- Department of Biomechanics Research Laboratory, Yonsei University, 1 Yonseidae-gil, Wonju-si, Gangwon-do 26493, Republic of Korea
| | - Young Ho Kim
- Department of Biomechanics Research Laboratory, Yonsei University, 1 Yonseidae-gil, Wonju-si, Gangwon-do 26493, Republic of Korea.
| | - Sung Hoon Kim
- Department of Rehabilitation Medicine, Yonsei Wonju College of Medicine, Yonsei Wonju Severance Christian Hospital, 20 Ilsan-ro, Wonju-si, Gangwon-do 26426, Republic of Korea.
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Lark SD, Dickie JA, Faulkner JA, Barnes MJ. Muscle activation and local muscular fatigue during a 12-minute rotational bridge. Sports Biomech 2018; 18:402-413. [DOI: 10.1080/14763141.2018.1433870] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Sally D. Lark
- School of Sport and Exercise, Massey University, Wellington, New Zealand
| | - James A. Dickie
- School of Sport and Exercise, Massey University, Wellington, New Zealand
- Wellington Lions Rugby, Wellington South, New Zealand
| | - James A. Faulkner
- School of Sport and Exercise, Massey University, Wellington, New Zealand
- Department of Sport and Exercise, University of Winchester, Winchester, UK
| | - Matthew J. Barnes
- School of Sport and Exercise, Massey University, Palmerston North, New Zealand
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Fulford J, Juroskova V, Meakin JR, Barker AR. Muscle function and size in the lumbar spine before and after a four week exercise intervention. J Back Musculoskelet Rehabil 2017; 30:717-724. [PMID: 28453450 DOI: 10.3233/bmr-150337] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND Exercise of the spinal muscles is recommended for a variety of rehabilitative reasons but it is not always clear whether interventions are effective in improving the performance of the muscles or whether their benefit is elicited via other mechanisms. OBJECTIVE To explore the effects of an exercise intervention on the size and exercise performance of the lumbar spine extensor muscles. METHODS Eleven healthy participants undertook a four week programme of exercise. Magnetic resonance imaging and phosphorus spectroscopy were performed before and after the intervention to determine the time to fatigue and phosphocreatine (PCr) depletion during a muscle endurance test (modified Biering-Sørensen) together with muscle cross-sectional area (CSA). RESULTS The post intervention measures were significantly different to the pre-intervention results for the time to fatigue (post-pre: 20.5 ± 22.7 s (P= 0.014)) and PCr depletion both at the point of fatigue (post-pre: 9.5 ± 11.9% (P= 0.024)) and at a matched time-point (post-pre: 12.2 ± 11.9% (P= 0.007)). CSA was not significantly different in any muscle. CONCLUSIONS Exercise improved the performance of the trunk muscles despite no impact on CSA. This demonstrated the importance of obtaining a wide range of measures when assessing the effectiveness of exercise intervention programmes.
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Affiliation(s)
- Jonathan Fulford
- Exeter NIHR Clinical Research Facility, University of Exeter Medical School, University of Exeter, Exeter, UK
| | - Vladimira Juroskova
- Sport and Health Sciences, College of Life and Environmental Sciences, University of Exeter, Exeter, UK
| | - Judith R Meakin
- Physics, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, UK
| | - Alan R Barker
- Sport and Health Sciences, College of Life and Environmental Sciences, University of Exeter, Exeter, UK
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Mohamad NZ, Hamzaid NA, Davis GM, Abdul Wahab AK, Hasnan N. Mechanomyography and Torque during FES-Evoked Muscle Contractions to Fatigue in Individuals with Spinal Cord Injury. SENSORS (BASEL, SWITZERLAND) 2017; 17:E1627. [PMID: 28708068 PMCID: PMC5539548 DOI: 10.3390/s17071627] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 04/05/2017] [Accepted: 04/12/2017] [Indexed: 11/22/2022]
Abstract
A mechanomyography muscle contraction (MC) sensor, affixed to the skin surface, was used to quantify muscle tension during repetitive functional electrical stimulation (FES)-evoked isometric rectus femoris contractions to fatigue in individuals with spinal cord injury (SCI). Nine persons with motor complete SCI were seated on a commercial muscle dynamometer that quantified peak torque and average torque outputs, while measurements from the MC sensor were simultaneously recorded. MC-sensor-predicted measures of dynamometer torques, including the signal peak (SP) and signal average (SA), were highly associated with isometric knee extension peak torque (SP: r = 0.91, p < 0.0001), and average torque (SA: r = 0.89, p < 0.0001), respectively. Bland-Altman (BA) analyses with Lin's concordance (ρC) revealed good association between MC-sensor-predicted peak muscle torques (SP; ρC = 0.91) and average muscle torques (SA; ρC = 0.89) with the equivalent dynamometer measures, over a range of FES current amplitudes. The relationship of dynamometer torques and predicted MC torques during repetitive FES-evoked muscle contraction to fatigue were moderately associated (SP: r = 0.80, p < 0.0001; SA: r = 0.77; p < 0.0001), with BA associations between the two devices fair-moderate (SP; ρC = 0.70: SA; ρC = 0.30). These findings demonstrated that a skin-surface muscle mechanomyography sensor was an accurate proxy for electrically-evoked muscle contraction torques when directly measured during isometric dynamometry in individuals with SCI. The novel application of the MC sensor during FES-evoked muscle contractions suggested its possible application for real-world tasks (e.g., prolonged sit-to-stand, stepping,) where muscle forces during fatiguing activities cannot be directly measured.
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Affiliation(s)
- Nor Zainah Mohamad
- Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Nur Azah Hamzaid
- Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Glen M Davis
- Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia.
- Clinical Exercise and Rehabilitation Unit, Discipline of Exercise and Sports Sciences, Faculty of Health Sciences, University of Sydney, Lidcombe, NSW 2141, Australia.
| | - Ahmad Khairi Abdul Wahab
- Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Nazirah Hasnan
- Department of Rehabilitation Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia.
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Hill EC, Housh TJ, Smith CM, Schmidt RJ, Johnson GO. Mechanomyographic amplitude tracks fatigue-induced changes in mean power, but not moment production. ISOKINET EXERC SCI 2017. [DOI: 10.3233/ies-160652] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Correlation between stiffness and electromechanical delay components during muscle contraction and relaxation before and after static stretching. J Electromyogr Kinesiol 2017; 33:83-93. [PMID: 28232285 DOI: 10.1016/j.jelekin.2017.02.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 12/23/2016] [Accepted: 02/06/2017] [Indexed: 12/22/2022] Open
Abstract
The study was aimed at assessing possible correlations of the electromechanical delay components during muscle contraction (DelayTOT) and relaxation (R-DelayTOT), with muscle-tendon unit (MTU), muscle, and tendon stiffness before and after static stretching (SS). Plantarflexor muscles' maximum voluntary torque (Tmax) was measured in 18 male participants (age 24±3yrs; body mass 76.4±8.9kg; stature 1.78±0.09m; mean±SD). During Tmax, surface electromyogram (EMG), mechanomyogram, and force signals were detected. DelayTOT and R-DelayTOT with their electrochemical and mechanical components were calculated. Passive torque and myotendinous junction displacement were assessed at 0°, 10° and 20° of dorsiflexion to determine MTU, muscle and tendon stiffness. The same protocol was repeated after SS. DelayTOT, R-DelayTOT and their mainly mechanical components correlated with MTU, muscle and tendon stiffness, both before (R2 from 0.562 to 0.894; p<0.001) and after SS (R2 from 0.726 to 0.955; p<0.001). SS decreased Tmax (-14%; p<0.001) and lengthened almost all the DelayTOT and R-DelayTOT components (from +5.9% to +30.5%; p<0.05). Correlations were found only between stiffness and the mechanical components of DelayTOT and R-DelayTOT. Correlations persisted after SS but delays increased to a higher extent than stiffness, indicating a complexity of the relationship between stiffness and delays that will be discussed in the manuscript.
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Miramonti AA, Jenkins NDM, Oza PD, Weir JP, Cramer JT. Mechanomyographic responses during recruitment curves in the soleus muscle. Muscle Nerve 2017; 56:107-116. [PMID: 27718510 DOI: 10.1002/mus.25432] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 10/03/2016] [Accepted: 10/06/2016] [Indexed: 11/07/2022]
Abstract
INTRODUCTION In this study we examined relationships among mechanomyographic (MMG), electromyographic (EMG), and peak twitch torque (PTT) responses as well as test-retest reliability when recorded during recruitment curves in the soleus muscle. METHODS PTT, EMG (M-wave, H-reflex), and MMG responses were recorded during recruitment curves in 16 subjects (age 24 ± 2 years) on 2 separate days. The sum of the M-wave and H-reflex (M+H) was calculated. Correlations among variables and test-retest reliability were determined. RESULTS MMG was correlated with PTT (mean r = 0.93, range r = 0.59-0.99), the M-wave (0.95, 0.04-0.98), and M+H (0.91, 0.42-0.97), but was unrelated to the H-reflex (-0.06, -0.56 to 0.47). Reliability was consistently high among most variables, but normalizing to the maximum value improved MMG reliability and the minimum detectable change. CONCLUSION MMG responses predicted 86%-90% of the variability in PTT, M-wave, and M+H; thus, MMG may be a useful alternative for estimating twitch torque and maximal activation. Muscle Nerve 56: 107-116, 2017.
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Affiliation(s)
- Amelia A Miramonti
- Department of Nutrition and Health Science, University of Nebraska, 211 Ruth Leverton Hall, Lincoln, Nebraska, 68583-0806, USA
| | - Nathaniel D M Jenkins
- Department of Health and Human Performance, Oklahoma State University, Stillwater, Oklahoma, USA
| | - Preeti D Oza
- Department of Physical Therapy, University of the Pacific, Stockton, California, USA
| | - Joseph P Weir
- Department of Health, Sport, and Exercise Sciences, University of Kansas, Lawrence, Kansas, USA
| | - Joel T Cramer
- Department of Nutrition and Health Science, University of Nebraska, 211 Ruth Leverton Hall, Lincoln, Nebraska, 68583-0806, USA
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Youn JI, Lee HS, Lee S. Determination of effective treatment duration of interferential current therapy using electromyography. J Phys Ther Sci 2016; 28:2400-3. [PMID: 27630443 PMCID: PMC5011607 DOI: 10.1589/jpts.28.2400] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 05/26/2016] [Indexed: 11/24/2022] Open
Abstract
[Purpose] This study used electromyography to measure the effective treatment duration of
interferential current therapy for muscle fatigue. [Subjects and Methods] Fifteen healthy
adult men volunteered to participate in the study (age: 24.2 ± 1.3 years; weight: 67.6 ±
4.92 kg; height: 176.4 ± 4.92 cm). All subjects performed 5 min of isometric back
extension exercise to produce muscle fatigue, and were then treated with interferential
current therapy for 15 min, with electromyography monitoring (treatment group). After
sufficient rest, the exercise was repeated for 5 min and an electromyography signal was
acquired for 15 min with no treatment (control group). [Results] In the treatment group,
the median frequency shifted to a higher level; the root mean square decreased over time,
and then maintained a minimum amplitude. However, there were few changes in the
electromyography signal after exercise in the control group. [Conclusion] Electromyography
signals can provide information about the effective duration for muscle fatigue treatment
as well as the muscle characteristics during treatment. This study should be helpful for
clinicians by demonstrating the appropriate duration of therapy for relief of muscle
stiffness.
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Affiliation(s)
- Jong-In Youn
- Department of Biomedical Engineering, Catholic University of Daegu, Republic of Korea
| | - Ho Sub Lee
- Hanbang Body-Fluid Research Center, Wonkwang University, Republic of Korea
| | - Sangkwan Lee
- Department of Internal Medicine and Neuroscience, College of Korean Medicine, Wonkwang University, Republic of Korea
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The effects of accumulated muscle fatigue on the mechanomyographic waveform: implications for injury prediction. Eur J Appl Physiol 2016; 116:1485-94. [DOI: 10.1007/s00421-016-3398-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Accepted: 05/17/2016] [Indexed: 10/21/2022]
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Xu B, Akhtar A, Liu Y, Chen H, Yeo WH, Park S, Boyce B, Kim H, Yu J, Lai HY, Jung S, Zhou Y, Kim J, Cho S, Huang Y, Bretl T, Rogers JA. An Epidermal Stimulation and Sensing Platform for Sensorimotor Prosthetic Control, Management of Lower Back Exertion, and Electrical Muscle Activation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:4462-71. [PMID: 26469201 PMCID: PMC4833675 DOI: 10.1002/adma.201504155] [Citation(s) in RCA: 107] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Revised: 09/10/2015] [Indexed: 05/18/2023]
Abstract
The design of an ultrathin, conformal electronic device that integrates electrotactile stimulation with electromyography, temperature, and strain sensing in a single, simple platform is reported. Experiments demonstrate simultaneous use of multiple modes of operation of this type of device in the sensorimotor control of robotic systems, in the monitoring of lower back exertion and in muscle stimulation.
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Affiliation(s)
- Baoxing Xu
- Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, VA 22904, USA; Department of Materials Science and Engineering Beckman Institute, and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Aadeel Akhtar
- Neuroscience Program, Medical Scholars Program, Beckman Institute, and Coordinated Science Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Yuhao Liu
- Department of Materials Science and Engineering Beckman Institute, and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Hang Chen
- Department of Engineering Mechanics and Center for Mechanics and Materials, Tsinghua University, Beijing 100084, China; Department of Mechanical Engineering and Department of Civil and Environmental Engineering, Center for Engineering and Health and Skin Disease Research Center, Northwestern University, Evanston, IL 60208, USA
| | - Woon-Hong Yeo
- Department of Materials Science and Engineering Beckman Institute, and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Department of Mechanical and Nuclear Engineering, Center for Rehabilitation Science and Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA
| | - Sung Park
- Department of Materials Science and Engineering Beckman Institute, and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Brandon Boyce
- Department of Aerospace Engineering, Beckman Institute, and Coordinated Science Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Hyunjin Kim
- Department of Materials Science and Engineering Beckman Institute, and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Jiwoo Yu
- Department of Materials Science and Engineering Beckman Institute, and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Hsin-Yen Lai
- Department of Materials Science and Engineering Beckman Institute, and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Sungyoung Jung
- Department of Materials Science and Engineering Beckman Institute, and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Yuhao Zhou
- Department of Materials Science and Engineering Beckman Institute, and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Jeonghyun Kim
- Department of Materials Science and Engineering Beckman Institute, and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Seongkyu Cho
- Department of Materials Science and Engineering Beckman Institute, and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Yonggang Huang
- Department of Mechanical Engineering and Department of Civil and Environmental Engineering, Center for Engineering and Health and Skin Disease Research Center, Northwestern University, Evanston, IL 60208, USA
| | - Timothy Bretl
- Department of Aerospace Engineering, Beckman Institute, and Coordinated Science Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - John A. Rogers
- Department of Materials Science and Engineering Beckman Institute, and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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Croce R, Craft A, Miller J, Chamberlin K, Filipovic D. Quadriceps mechano- and electromyographic time-frequency responses during muscular contractions to volitional exhaustion. Muscle Nerve 2016; 53:452-63. [DOI: 10.1002/mus.24764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Revised: 06/30/2015] [Accepted: 07/07/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Ronald Croce
- Motor Control and Biomechanics Laboratory; Department of Kinesiology; University of New Hampshire; Durham New Hampshire 03824 USA
| | - Amber Craft
- Motor Control and Biomechanics Laboratory; Department of Kinesiology; University of New Hampshire; Durham New Hampshire 03824 USA
| | - John Miller
- Motor Control and Biomechanics Laboratory; Department of Kinesiology; University of New Hampshire; Durham New Hampshire 03824 USA
| | - Kent Chamberlin
- Department of Electrical and Computer Engineering; University of New Hampshire; Durham New Hampshire USA
| | - David Filipovic
- Department of Electrical and Computer Engineering; University of New Hampshire; Durham New Hampshire USA
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Wages NP, Beck TW, Ye X, Hofford CW. Examination of the resting mechanomyographic mean frequency responses for the postural tonus muscles following resistance exercise. Biomed Phys Eng Express 2016. [DOI: 10.1088/2057-1976/2/1/015002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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46
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Whole-body vibration and occupational physical performance: a review. Int Arch Occup Environ Health 2015; 89:181-97. [DOI: 10.1007/s00420-015-1062-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Accepted: 05/18/2015] [Indexed: 12/23/2022]
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Comparative study of a muscle stiffness sensor and electromyography and mechanomyography under fatigue conditions. Med Biol Eng Comput 2015; 53:577-88. [PMID: 25752771 DOI: 10.1007/s11517-015-1271-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Accepted: 03/02/2015] [Indexed: 10/23/2022]
Abstract
This paper proposes the feasibility of a stiffness measurement for muscle contraction force estimation under muscle fatigue conditions. Bioelectric signals have been widely studied for the estimation of the contraction force for physical human-robot interactions, but the correlation between the biosignal and actual motion is decreased under fatigue conditions. Muscle stiffness could be a useful contraction force estimator under fatigue conditions because it measures the same physical quantity as the muscle contraction that generates the force. Electromyography (EMG), mechanomyography (MMG), and a piezoelectric resonance-based active muscle stiffness sensor were used to analyze the biceps brachii under isometric muscle fatigue conditions with reference force sensors at the end of the joint. Compared to EMG and MMG, the change in the stiffness signal was smaller (p < 0.05) in the invariable contraction force generation test until failure. In addition, in the various contraction level force generation tests, the stiffness signal under the fatigue condition changed <10% (p < 0.05) compared with the signal under non-fatigue conditions. This result indicates that the muscle stiffness signal is less sensitive to muscle fatigue than other biosignals. This investigation provides insights into methods of monitoring and compensating for muscle fatigue.
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48
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Mechanomyographic parameter extraction methods: an appraisal for clinical applications. SENSORS 2014; 14:22940-70. [PMID: 25479326 PMCID: PMC4299047 DOI: 10.3390/s141222940] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Revised: 10/28/2014] [Accepted: 11/04/2014] [Indexed: 11/16/2022]
Abstract
The research conducted in the last three decades has collectively demonstrated that the skeletal muscle performance can be alternatively assessed by mechanomyographic signal (MMG) parameters. Indices of muscle performance, not limited to force, power, work, endurance and the related physiological processes underlying muscle activities during contraction have been evaluated in the light of the signal features. As a non-stationary signal that reflects several distinctive patterns of muscle actions, the illustrations obtained from the literature support the reliability of MMG in the analysis of muscles under voluntary and stimulus evoked contractions. An appraisal of the standard practice including the measurement theories of the methods used to extract parameters of the signal is vital to the application of the signal during experimental and clinical practices, especially in areas where electromyograms are contraindicated or have limited application. As we highlight the underpinning technical guidelines and domains where each method is well-suited, the limitations of the methods are also presented to position the state of the art in MMG parameters extraction, thus providing the theoretical framework for improvement on the current practices to widen the opportunity for new insights and discoveries. Since the signal modality has not been widely deployed due partly to the limited information extractable from the signals when compared with other classical techniques used to assess muscle performance, this survey is particularly relevant to the projected future of MMG applications in the realm of musculoskeletal assessments and in the real time detection of muscle activity.
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Kankaanpää M, Colier WN, Taimela S, Anders C, Airaksinen O, Kokko-Aro SM, Hänninen O. Back extensor muscle oxygenation and fatigability in healthy subjects and low back pain patients during dynamic back extension exertion. ACTA ACUST UNITED AC 2014; 12:267-73. [PMID: 16289763 DOI: 10.1016/j.pathophys.2005.09.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2005] [Revised: 09/12/2005] [Accepted: 09/13/2005] [Indexed: 10/25/2022]
Abstract
The purpose of this study was to assess if chronic low back pain patients have impaired paraspinal muscle O2 turnover and endurance capacity as compared to healthy control subjects during dynamic exercise. Middle-aged healthy male subjects (n = 12, control) and male patients with chronic low back pain (n = 17, CLBP) participated in the study. L4–L5 level paraspinal muscle fatigue was objectively assessed during earlier validated 90 s dynamic back endurance test (spectral EMG, MPFslope). Also EMG amplitude (EMGamplitude) and initial MPF (MPFinitial) were assessed from the initial 5 s of the endurance contraction. Simultaneously near infrared spectroscopy (NIRS) was used for quantitative measurement of local L4–L5 paraspinal muscle O2 consumption. Subcutaneous tissue thickness (ATT) was measured from the EMG and NIRS recording sites. The results indicated that control and CLBP groups were compatible as regarding anthropometric variables, paraspinal muscle activation levels (EMGamplitude), initial MPF (MPFinitial) and ATT. When the ATT was used as a covariate in the ANOVA analysis, CLBP group did not show significantly greater paraspinal muscle fatigability (right MPFslope – 12.2 ± 10.7%/min, left right MPFslope – 12.6 ± 13.3%/min) or O2 consumption (right NIRSslope – 52.8 ± 79.6 μM/l/s) as compared to healthy controls (right MPFslope – 11.9 ± 7.6%/min, left MPFslope – 12.7 ± 8.6%/min, right NIRSslope – 53.7 ± 95.2 μM/l/s). As a conclusion, these CLBP male patients did not show any impaired rate of paraspinal muscle oxygen consumption or excessive paraspinal muscle fatigability during dynamic exercise as compared with healthy controls. Subcutaneous tissue thickness has a strong influence on the NIRS and EMG amplitude measurements and, if unchecked, it could result in the false interpretation of the results.
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Affiliation(s)
- Markku Kankaanpää
- Department of Physical Medicine and Rehabilitation, Kuopio University Hospital, P.O. Box 1777, 70211 Kuopio, Finland.
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Comparative assessment of surgeons’ task performance and surgical ergonomics associated with conventional and modified flank positions: a simulation study. Surg Endosc 2014; 28:3249-56. [DOI: 10.1007/s00464-014-3598-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Accepted: 05/06/2014] [Indexed: 10/25/2022]
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