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

2018 ◽  
Vol 15 (4) ◽  
pp. 784 ◽  
Author(s):  
Imran Ahmad ◽  
Jung-Yong Kim
Keyword(s):  
Muscle Fatigue ◽  
Perceived Exertion ◽  
Whole Body ◽  
Squat Lifting ◽  
Local Muscle Fatigue

Usefulness of Power Spectral Analysis for Measurement of Local Muscle Fatigue during Keyboard Task

1999 ◽  
Vol 11 (4) ◽  
pp. 449
Author(s):  
Soon Young Kwon ◽  
Chung Yill Park ◽  
Jung Wan Koo ◽  
Hyeon Woo Yim ◽  
Kang Sook Lee
Keyword(s):  
Spectral Analysis ◽  
Muscle Fatigue ◽  
Power Spectral Analysis ◽  
Power Spectral ◽  
Local Muscle Fatigue

Kinematic contribution and synchronization of the trunk, hip, and knee during free-dynamic lifting

2003 ◽  
Vol 3 (2) ◽  
pp. 99-108
Author(s):  
Kermit G. Davis ◽  
Riley E. Splittstoesser ◽  
William S. Marras
Keyword(s):  
Whole Body ◽  
Knee Height ◽  
Squat Lifting ◽  
The Difference ◽  
Free Dynamic ◽  
Body Lifting ◽  
And Task ◽  
Kinematic Contribution ◽  
Stoop Lifting

Although there have been numerous studies evaluating the difference between stooped and squat lifting styles, there remains a lack of understanding of whole body kinematics during unrestricted lifting. The current study evaluated nine males and nine females while lifting two box weights (9.1 kg, 18.2 kg) from five origins below the waist (0, 19, 38, 57, and 76 cm above the floor) and from three task asymmetries (sagittally symmetric, 45° clockwise, 45° counter-clockwise). While the lifting style was significantly influenced by the height of lift origin and to a lesser extent gender, box weight, and task asymmetry, none of the conditions resulted in pure squat or stoop lifting style. However, for lifts above knee height, the lifting style resembled more of a stoop lift while lifts originating below knee height were more of a squat lift. As the origin moved closer to the floor, participants relied more on their hips to accomplish the sagittal flexion but overall adopted a more coordinated whole-body lifting style. All together, as more sagittal flexion is required, more joints are relied upon in a more coordinated effort. The current study indicates that caution needs to be exercised when applying results of pure squat or pure stoop lifting studies to free-style (realistic) lifting.

Psychophysical and physiological comparison of squat and semi-squat lifting by young males

1999 ◽  
Vol 2 (1) ◽  
pp. 17-26
Author(s):  
Leon Straker ◽  
Carol Cain
Keyword(s):  
Heart Rate ◽  
Perceived Exertion ◽  
Ratings Of Perceived Exertion ◽  
Lower Heart Rate ◽  
Young Males ◽  
Squat Lifting

A comparison between semi-squat and squat techniques was made for floor to knuckle height lifting using maximum acceptable weight (MAW), ratings of perceived exertion (RPE) and heart rate. Semi-squat lifting resulted in greater MAW with lower RPE and lower heart rate compared to squat lifting. Discomfort was most commonly reported in knees/quadriceps with squat lifting. Twelve of the 13 subjects preferred the semi-squat technique. The results provide evidence that the semi-squat technique may have benefits over the squat technique for lifting a medium sized box from floor to knuckle height.

scholarly journals Modelling the Additivity of Perceived Exertion in Symmetric, Mid-Sagittal Lifting

1994 ◽  
Vol 38 (10) ◽  
pp. 621-625 ◽  
Author(s):  
Brian D. Lowe
Keyword(s):  
Perceived Exertion ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Whole Body ◽  
Coefficient Of Determination ◽  
Perceived Effort ◽  
Repetitive Lifting ◽  
The Relationship ◽  
Whole Body Exertion ◽  
Lifting Task

Psychophysical approaches to quantifying perceived effort have been used to evaluate the physical demand of many industrial work activities. An experiment was conducted to examine the relationship between ratings of whole-body perceived exertion and differentiated, regional ratings of exertion. The Borg, CR-10 scale was used by 16 subjects performing a simulated repetitive lifting task. Ratings of perceived exertion were obtained for the arms, legs, torso, and central (cardiorespiratory) effort sensations as well as a rating of overall, whole-body exertion. A multiple linear regression analysis was used to predict the whole-body rating of exertion from the differentiated ratings in lifting tasks using both a squat and stoop posture. In the stoop posture condition the coefficient of determination between whole-body perceived exertion and the model including arm, torso, and central ratings was R2=0.81. In the squat posture condition, the final regression model predicting whole-body exertion contained only the rating from the legs (R2 = 0.62). Differentiated ratings explained the majority of the variance in whole-body perceived exertion for squat and stoop lifting tasks.

Perceived exertion during muscle fatigue as reflected in movement-related cortical potentials

Neuroreport ◽  
2017 ◽  
Vol 28 (3) ◽  
pp. 115-122 ◽  
Author(s):  
Feng Guo ◽  
Yong-Jun Sun ◽  
Ri-Hui Zhang
Keyword(s):  
Muscle Fatigue ◽  
Perceived Exertion ◽  
Cortical Potentials

scholarly journals Effects of Exposure to Normobaric Hyperoxia on the Recovery of Local Muscle Fatigue in the Quadriceps Femoris of Young People

2014 ◽  
Vol 26 (3) ◽  
pp. 455-460 ◽  
Author(s):  
Yuka Yokoi ◽  
Ryuya Yanagihashi ◽  
Katsuyuki Morishita ◽  
Takayuki Fujiwara ◽  
Koji Abe
Keyword(s):  
Young People ◽  
Muscle Fatigue ◽  
Quadriceps Femoris ◽  
Normobaric Hyperoxia ◽  
Local Muscle Fatigue
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