Assessment of Whole Body and Local Muscle Fatigue Using Electromyography and a Perceived Exertion Scale for Squat Lifting
Abstract
:1. Introduction
2. Materials and Methods
2.1. Subjects
2.2. Muscle Selection and Location of Electrodes
2.3. Apparatus
2.4. Pre-Processing of EMG Signal
2.5. Principal Component Analysis
3. Experiment Design
3.1. Procedure
3.2. Data Analysis
3.3. Statistical Analysis
4. Results
5. Discussion
5.1. Perceived Exertions
5.2. Mean Power Frequency and Heart Rate
5.3. Principal Component Analysis
6. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Body Regions for RPE | Number of Squats | ||||||
---|---|---|---|---|---|---|---|
4 | 8 | 12 | 16 | 20 | 24 | ||
Weights | |||||||
4 kg vs. 8 kg | 4 kg vs. 8 kg | 4 kg vs. 8 kg | 4 kg vs. 8 kg | 4 kg vs. 8 kg | 4 kg vs. 8 kg | ||
Lower | F | 11.73 | 47.71 | 54.76 | 22.65 | 33.82 | 3.85 |
p | 0.001 | * | * | * | * | 0.055 | |
Upper | F | 21.87 | 56.82 | 40.76 | 36.96 | 47.32 | 87.48 |
p | * | * | * | * | * | * | |
Whole body | F | 3.27 | 0.05 | 18.78 | 13.36 | 8.73 | 0.96 |
p | 0.077 | 0.821 | * | 0.001 | 0.05 | 0.332 |
Extremity | Muscle | NMPF Slope | |
---|---|---|---|
4 kg | 8 kg | ||
Upper | MD * | −0.44 | −0.45 |
AD | −0.34 | −0.41 | |
UT | −0.15 | −0.12 | |
SP | −0.15 | −0.19 | |
Lower | BF | −0.11 | 0.23 |
VS | −0.19 | −0.29 | |
GS | −0.14 | −0.15 | |
RF * | −0.31 | −0.30 | |
Whole body | HR | Heart Rate slope | |
0.7698 | 0.62 |
Extremity | Muscle Type | Pearson’s r | |
---|---|---|---|
4 kg | 8 kg | ||
Upper | MD | −0.89 | −0.84 |
AD | −0.87 | −0.88 | |
UT | −0.95 | −0.83 | |
SP | −0.96 * | −0.87 | |
Lower | BF | −0.84 | 0.87 * |
VS | −0.95 | 0.79 | |
GS | −0.90 | −0.83 | |
RF | −0.78 | −0.82 | |
Whole body | HR | 0.96 | 0.95 |
Outcome | Implications | |
---|---|---|
1 | If the perceived whole body fatigue is higher than upper and lower extremity | Whole body fatigue dominates the peripheral fatigue in squat lifting |
2 | If upper extremity perceived fatigue is higher than the wholebody and lower extrimty perceived fatigue | Upper body perceived exertion dominates the whole body and lower extremity perceived fatigue in squat lifting |
3 | If lower body perceived fatigue is higher than the whole body and upper body perceived exertion | Lower body perceived exertion dominates the whole body the and upper body perceived exertion in squat lifting |
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Ahmad, I.; Kim, J.-Y. Assessment of Whole Body and Local Muscle Fatigue Using Electromyography and a Perceived Exertion Scale for Squat Lifting. Int. J. Environ. Res. Public Health 2018, 15, 784. https://doi.org/10.3390/ijerph15040784
Ahmad I, Kim J-Y. Assessment of Whole Body and Local Muscle Fatigue Using Electromyography and a Perceived Exertion Scale for Squat Lifting. International Journal of Environmental Research and Public Health. 2018; 15(4):784. https://doi.org/10.3390/ijerph15040784
Chicago/Turabian StyleAhmad, Imran, and Jung-Yong Kim. 2018. "Assessment of Whole Body and Local Muscle Fatigue Using Electromyography and a Perceived Exertion Scale for Squat Lifting" International Journal of Environmental Research and Public Health 15, no. 4: 784. https://doi.org/10.3390/ijerph15040784