Assessment of Whole Body and Local Muscle Fatigue Using Electromyography and a Perceived Exertion Scale for Squat Lifting

Ahmad, Imran; Kim, Jung-Yong

doi:10.3390/ijerph15040784

Cited by 22 publications

(14 citation statements)

References 39 publications

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“…Electromyography (EMG) data have been shown to provide reliable information in assessing muscular activities for various tasks (Ahmad & Kim, 2018; Gazzoni, 2010; Luttmann et al, 2000; Vøllestad, 1997). It has also been shown to be an appropriate tool in assessing the risk of WMSDs where there are multiple risk exposures (Seidel et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Muscular fatigue measurements for push‐down tasks in ground demolitions

2020

Hum Ftrs & Erg Mfg Svc

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Demolition hammering tasks are physically demanding tasks that could cause muscle fatigue and musculoskeletal disorders. Electromyography (EMG) data have been adopted to assess levels of muscular activity and onset of muscular fatigue for both industrial tasks and physical activities. An experiment simulating a manual demolition task on the ground was performed on 23 healthy male participants. The objectives were to test the hypotheses that the handle height and the force applied to affect the EMG amplitude, the increase of the EMG amplitude, and the decline of the mean power frequency (MPF) of the EMG for performing the tasks. This study also aimed at finding the most fatigued muscles which dominate the end of the sustained push-down tasks in ground demolitions. The results showed that the EMG amplitude required to perform the tasks was significantly affected by the handle height and force applied. Significant increases in EMG amplitude and decreases in MPF were found. Bicep brachii, tricep brachii, and pectoralis major muscles were the most fatigued muscles that dominated the termination of the tasks. Pushing with body leaning forward to utilize partial body weight was less fatiguing than the other two postures. Elbow flexion is undesirable and should be avoided when performing such tasks.

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Section: Introductionmentioning

confidence: 99%

“…EMG has been used to study muscle activities in many manual materials handling tasks (Ahmad & Kim, 2018; Shair et al, 2017). It, however, has not been used in measuring muscle activities while performing manual demolition tasks.…”

Section: Introductionmentioning

confidence: 99%

Muscular fatigue measurements for push‐down tasks in ground demolitions

2020

Hum Ftrs & Erg Mfg Svc

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“…Manual material handling (MMH) of loads and carrying of loads is common in the workplace and even in everyday life (Ramadan, Khalaf, Ragab, & Abdelgawad, 2018). While objective measures, such as trunk load and muscle electromyography (EMG), have been analyzed to evaluate the risks of MMH, some studies utilized subjective methods such as rated perceived exertions and perceived weight of load to evaluate workload and fatigue (Ahmad & Kim, 2018). However, humans' perception of weight is not always accurate, which can influence people's decisions on lifting heavy objects and lead to potential risks (Amazeen, 2014).…”

Section: Introductionmentioning

confidence: 99%

Examining human perception of weight during loaded standing and walking

Chen

Fitts

2021

Proceedings of the Human Factors and Ergonomics Society Annual

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While the psychophysics of weight perception may help assess the effort needed in manual material handling tasks, the perception of weight is subjective and not necessarily accurate. The purpose of this study was to examine weight perception during standing and walking. Participants (n=10) performed a series of weight comparison trials against a reference load while holding loads (standing) or carrying loads (walking). Polynomial logistic regression models were built to examine the effects of walking, box weight ratio, and reference weight level on the probability of detecting a weight difference. The results showed that weight ratio and reference weight level had statistically significant effects on the detection probability while walking did not have a significant effect. Findings from this study can help inform the design of subjective evaluation of job demands involving motion, and it can be further extended to the gradual increase in load of strengthening tasks in therapeutic exercises.

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“…For example, the forward head posture affected neck extensor muscle thickness (Goodarzi et al, 2018 ), and the spinal misalignment had bad influence on back muscle strength and shoulder range of motion (Imagama et al, 2014 ). Meanwhile, some other studies showed that poor posture had negative impact on the musculo-skeletal system, caused localized muscle fatigue, and may affect physical function and level of abilities (Ahmad and Kim, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

Effective Assessments of a Short-Duration Poor Posture on Upper Limb Muscle Fatigue Before Physical Exercise

Robinson

Tan

et al. 2020

Front. Physiol.

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A forward head and rounded shoulder posture is a poor posture that is widely seen in everyday life. It is known that sitting in such a poor posture with long hours will bring health issues such as muscle pain. However, it is not known whether sitting in this poor posture for a short period of time will affect human activities. This paper investigates the effects of a short-duration poor posture before some typical physical activities such as push-ups. The experiments are set up as follows. Fourteen male subjects are asked to do push-ups until fatigue with two surface electromyography (sEMG) at the upper limb. Two days later, they are asked to sit in this poor posture for 15 min with eight sEMG sensors located at given back muscles. Then they do the push-ups after the short-duration poor posture. The observations from the median frequency of sEMG signals at the upper limb indicate that the short-duration poor posture does affect the fatigue procedure of push-ups. A significant decreasing trend of the performance of push-ups is obtained after sitting in this poor posture. Such effects indicate that some parts of the back muscles indeed get fatigued with only 15 min sitting in this poor posture. By further investigating the time-frequency components of sEMG of back muscles, it is observed that the low and middle frequencies of sEMG signals from the infraspinatus muscle of the dominant side are demonstrated to be more prone to fatigue with the poor posture. Although this study focuses only on push-ups, similar experiments can be arranged for other physical exercises as well. This study provides new insights into the effect of a short-duration poor posture before physical activities. These insights can be used to guide athletes to pay attention to postures before physical activities to improve performance and reduce the risk of injury.

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Assessment of Whole Body and Local Muscle Fatigue Using Electromyography and a Perceived Exertion Scale for Squat Lifting

Cited by 22 publications

References 39 publications

Muscular fatigue measurements for push‐down tasks in ground demolitions

Muscular fatigue measurements for push‐down tasks in ground demolitions

Examining human perception of weight during loaded standing and walking

Effective Assessments of a Short-Duration Poor Posture on Upper Limb Muscle Fatigue Before Physical Exercise

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