Effect of fatigue on muscle latency, muscle activation and perceived discomfort when exposed to whole-body vibration

Nolan, Alexander; Govers, Megan E.; Oliver, Michele

doi:10.1080/00140139.2021.1909146

Cited by 10 publications

(5 citation statements)

References 71 publications

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“…The resulting muscle fatigue is associated with an increased risk of injury [52]. It was observed that as the back muscles of a participant became increasingly fatigued, the muscle reflex designed to protect the spine from shock injuries was delayed, supporting the conclusion that an increased risk of injury is present when exposed to WBV while experiencing muscle fatigue [52].…”

Section: Discussionmentioning

confidence: 95%

Examining the Impact of Rotated Neck and Trunk Postures on Vertical Seat-to-Head Vibration Transmissibility and Self-Reported Discomfort

et al. 2022

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Adopting non-neutral sitting postures while exposed to whole-body vibration (WBV) can put heavy equipment operators at an increased risk for lower back pain and may cause damage to the spinal tissue. A laboratory experiment involving 11 participants (5 females, 6 males) completing four 45-min test sessions incorporating different seated conditions (vibration versus no vibration, and rotation versus no rotation) was used to assess seat-to-head transmissibility (STHT) and self-reported discomfort while in four rotated neck and trunk postures. The vibration exposure profile was a constant vertical sinusoidal signal with a frequency of 3 Hz and 0.7 m/s2 acceleration. Vibration measured at the head was greater than at the seat under all conditions, with a statistically significant effect of time (F1,10 = 101.73, p < 0.001, Eta2 = 0.910) and posture (F3,8 = 5.64, p = 0.023, Eta2 = 0.679). Mean self-reported discomfort ratings revealed increased participant discomfort in rotated neck and trunk positions in both vibration and non-vibration conditions. Increasing time also had a significant (F(1,10) = 15.53, p = 0.003) impact on higher rates of participant discomfort. Overall, it was found that increasing the degree of rotated neck and trunk position from neutral amplified the STHT and self-reported discomfort.

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Section: Discussionmentioning

confidence: 95%

Examining the Impact of Rotated Neck and Trunk Postures on Vertical Seat-to-Head Vibration Transmissibility and Self-Reported Discomfort

et al. 2022

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“…The increase in muscle activity caused by whole body vibration was significant, particularly for the back muscles, which was up to 19.0% MVC [79]. However, Nolan et al indicated that a person was at an increased risk for low back injury when their back muscles were fatigued and they were exposed to whole body vibration [80]. assessed the patterns of sEMG activity in the patients with LBP, which demonstrated that the differences between both sides' sEMG activity in the lumbar and cervical paraspinal muscle groups were important to distinguish between headache patients and LBP patients [4].…”

Section: Semg In Health and Behaviorsmentioning

confidence: 99%

Section: Evaluate Paraspinal Muscles With Semgmentioning

confidence: 99%

The Application of Surface Electromyography Technology in Evaluating Paraspinal Muscle Function

Suo,

Zhou,

Wang

et al. 2024

Diagnostics

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Surface electromyography (sEMG) has emerged as a valuable tool for assessing muscle activity in various clinical and research settings. This review focuses on the application of sEMG specifically in the context of paraspinal muscles. The paraspinal muscles play a critical role in providing stability and facilitating movement of the spine. Dysfunctions or alterations in paraspinal muscle activity can lead to various musculoskeletal disorders and spinal pathologies. Therefore, understanding and quantifying paraspinal muscle activity is crucial for accurate diagnosis, treatment planning, and monitoring therapeutic interventions. This review discusses the clinical applications of sEMG in paraspinal muscles, including the assessment of low back pain, spinal disorders, and rehabilitation interventions. It explores how sEMG can aid in diagnosing the potential causes of low back pain and monitoring the effectiveness of physical therapy, spinal manipulative therapy, and exercise protocols. It also discusses emerging technologies and advancements in sEMG techniques that aim to enhance the accuracy and reliability of paraspinal muscle assessment. In summary, the application of sEMG in paraspinal muscles provides valuable insights into muscle function, dysfunction, and therapeutic interventions. By examining the literature on sEMG in paraspinal muscles, this review offers a comprehensive understanding of the current state of research, identifies knowledge gaps, and suggests future directions for optimizing the use of sEMG in assessing paraspinal muscle activity.

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“…Pre-and post-fatigue data sets were analyzed separately because current ISO 2631-1 RMS values of frequency weighted acceleration for use in health evaluation and health guidance caution zones do not consider fatigue as a risk factor. However, research has suggested that trunk muscle fatigue during WBV leads to increased muscle latency and increased discomfort [31], which are associated with increased risk of low back injury [32][33][34].…”

Section: Statistical Analysesmentioning

confidence: 99%

“…Muscle fatigue when experienced separately to WBV may lead to neuromuscular recruitment errors, which may lead to increased injury risk [30]. Similarly, when back muscle fatigue and WBV exposure are experienced, concurrently muscle latency, muscle activation, and discomfort are increased [31], leading to escalated back injury risk [32][33][34][35]. Furthermore, muscle activation in the trunk significantly alters the biodynamics for the seated body under WBV [36].…”

Section: Introductionmentioning

confidence: 99%

Relationships between Height, Mass, Body Mass Index, and Trunk Muscle Activation during Seated Whole-Body Vibration Exposure

et al. 2021

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Operators of heavy equipment are often exposed to high levels of whole-body vibration (WBV), which has been associated with a variety of adverse health outcomes. Although anthropometric factors are known to impact vibration dose and risk of low back pain, studies have yet to investigate the influence of anthropometric factors on muscle activation during WBV exposure. This study quantified the relationships between muscle activation, vibration frequency, body mass, body mass index (BMI), and height both pre- and post-fatigue. Muscle activation of the external oblique (EO), internal oblique (IO), lumbar erector spinae (LE) and thoracic erector spinae (TE) were quantified using surface electromyography. Results indicate increased activation with increased mass, BMI, and frequency for the LE, TE, and IO, which may be a result of increased activation to stabilize the spine. Decreased muscle activation with increased height was seen in the TE, IO, and pre-fatigue EO, which could indicate higher risk for low back injury since height is associated with increased forces on the spine. This may contribute to the association between increased low back pain incidence and increased height. Results suggest that ISO 2631-1 health guidance should incorporate anthropometric factors, as these may influence muscle activation and back injury risk.

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Effect of fatigue on muscle latency, muscle activation and perceived discomfort when exposed to whole-body vibration

Cited by 10 publications

References 71 publications

Examining the Impact of Rotated Neck and Trunk Postures on Vertical Seat-to-Head Vibration Transmissibility and Self-Reported Discomfort

Examining the Impact of Rotated Neck and Trunk Postures on Vertical Seat-to-Head Vibration Transmissibility and Self-Reported Discomfort

The Application of Surface Electromyography Technology in Evaluating Paraspinal Muscle Function

Relationships between Height, Mass, Body Mass Index, and Trunk Muscle Activation during Seated Whole-Body Vibration Exposure

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