Neuromuscular and mean force changes during a fatiguing bout of exercise with and without blood flow restriction
äºComparative Exercise PhysiologySearch for other papers by C. Proppe in
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Florida Space Institute, Research Pkwy, Orlando, FL 32826, USA.
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Surface electromyography (EMG) and mean force can be used to identify motor unit excitation and fatigue. Low-load resistance training with blood flow restriction (LL+BFR) may result in earlier fatigue and maximal muscle fibre recruitment compared to low-load resistance training (LL). The purpose of this investigation was to examine EMG and force responses during LL versus LL+BFR. Thirteen males (mean ± standard deviation = 24±4 years) completed a bout (1Ã30) of leg extension muscle actions at 30% of their 1 repetition maximum LL and LL+BFR while force, EMG amplitude, and EMG mean power frequency (EMG MPF) were recorded. EMG amplitude increased (74.2%) and EMG MPF decreased (22.6%) similarly during both conditions. There was no significant difference in mean force during the first 3 repetitions between LL+BFR (477.3±132.3 N) and LL (524.3±235.1 N) conditions, but mean force was lower during the last 3 repetitions for LL+BFR (459.7±179.3 N) compared to LL (605.4±276.4 N). The results of the present study indicated that a fatiguing bout of leg extension muscle actions performed LL and LL+BFR elicited similar neuromuscular responses. There was a significant difference in mean force during the last 3 repetitions (LL>LL+BFR) that may have been due to differences in the time spent near peak force.
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|---|---|---|---|
| æè¦æµè§æ¬¡æ° | 378 | 130 | 37 |
| å ¨ææµè§æ¬¡æ° | 25 | 0 | 0 |
| PDFä¸è½½æ¬¡æ° | 17 | 0 | 0 |
Neuromuscular and mean force changes during a fatiguing bout of exercise with and without blood flow restriction
äºComparative Exercise PhysiologySearch for other papers by C. Proppe in
Current site
Google Scholar
PubMed
Search for other papers by P. Rivera in
Current site
Google Scholar
PubMed
Florida Space Institute, Research Pkwy, Orlando, FL 32826, USA.
Search for other papers by E. Beltran in
Current site
Google Scholar
PubMed
Florida Space Institute, Research Pkwy, Orlando, FL 32826, USA.
Search for other papers by E. Hill in
Current site
Google Scholar
PubMed
Surface electromyography (EMG) and mean force can be used to identify motor unit excitation and fatigue. Low-load resistance training with blood flow restriction (LL+BFR) may result in earlier fatigue and maximal muscle fibre recruitment compared to low-load resistance training (LL). The purpose of this investigation was to examine EMG and force responses during LL versus LL+BFR. Thirteen males (mean ± standard deviation = 24±4 years) completed a bout (1Ã30) of leg extension muscle actions at 30% of their 1 repetition maximum LL and LL+BFR while force, EMG amplitude, and EMG mean power frequency (EMG MPF) were recorded. EMG amplitude increased (74.2%) and EMG MPF decreased (22.6%) similarly during both conditions. There was no significant difference in mean force during the first 3 repetitions between LL+BFR (477.3±132.3 N) and LL (524.3±235.1 N) conditions, but mean force was lower during the last 3 repetitions for LL+BFR (459.7±179.3 N) compared to LL (605.4±276.4 N). The results of the present study indicated that a fatiguing bout of leg extension muscle actions performed LL and LL+BFR elicited similar neuromuscular responses. There was a significant difference in mean force during the last 3 repetitions (LL>LL+BFR) that may have been due to differences in the time spent near peak force.
| å ¨é¨æé´ | è¿å»ä¸å¹´ | è¿å»30天 | |
|---|---|---|---|
| æè¦æµè§æ¬¡æ° | 378 | 130 | 37 |
| å ¨ææµè§æ¬¡æ° | 25 | 0 | 0 |
| PDFä¸è½½æ¬¡æ° | 17 | 0 | 0 |
