Blood Flow Restriction Increases the Neural Activation of the Knee Extensors During Very Low-Intensity Leg Extension Exercise in Cardiovascular Patients: A Pilot Study
Abstract
:1. Introduction
2. Methods
2.1. Participants
2.2. Experimental Protocol
2.3. Blood Flow Restriction
2.4. Data Collection
2.5. Data Analysis
2.6. Statistics
3. Results
3.1. Electromyographic Activity During Concentric and Eccentric Contractions
3.2. Relative Electromyographic Changes in the Concentric Contraction Phase
3.3. Relative Electromyographic Changes in the Eccentric Contraction Phase
3.4. Subjective Exercise Intensity
3.5. Correlations Between Age and Relative EMG and RPE in the BFR Condition
4. Discussion
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Patient No, Sex | Age (years) | Height (cm) | Weight (kg) | LVEF | Drugs | Diagnosis | Days after Diagnosis |
---|---|---|---|---|---|---|---|
No 1, Male | 42 | 168.0 | 57.5 | 66% | ACEI, β-blocker | Post MVP | 482 |
No 2, Male | 25 | 168.0 | 61.3 | 53% | Post AVR | 105 | |
No 3, Male | 44 | 172.0 | 77.5 | 52% | ARB, β-blocker | Post AVR, TAP | 482 |
No 4, Male | 66 | 170.7 | 68.0 | 20% | Post AVR, TAP | 476 | |
No 5, Male | 70 | 171.4 | 67.5 | 46% | CCB, ACEI, β-blocker | Post BO | 293 |
No 6, Male | 46 | 170.0 | 67.0 | 63% | Post AVR, TAP | 187 | |
No 7, Female | 43 | 158.0 | 49.2 | 37% | β-blocker | CHF, MR, AR | 1018 |
10% Intensity | 20% Intensity | |||||||
---|---|---|---|---|---|---|---|---|
Without BFR | With BFR | Without BFR | With BFR | |||||
CON | ECC | CON | ECC | CON | ECC | CON | ECC | |
RF | 10.9 (1.8) | 7.7 (1.0) | 15.4 (2.2) | 12.6 (1.8) | 18.4 (2.5) | 13.5 (1.6) | 19.5 (2.3) | 15.8 (2.0) |
VL | 15.1 (2.1) | 10.2 (1.1) | 20.3 (2.6) | 15.5 (2.2) | 23.6 (3.2) | 16.5 (2.3) | 25.2 (3.2) | 18.3 (1.9) |
VM | 12.6 (1.6) | 9.3 (1.3) | 15.6 (2.0) | 12.4 (1.7) | 20.2 (3.0) | 14.3 (2.2) | 20.2 (3.0) | 15.8 (2.3) |
AVG | 11.8 (2.0) * | 8.5 (1.1) | 16.2 (2.4) * | 12.7 (1.9) | 20.3 (3.2) * | 14.2 (2.1) | 21.6 (3.2) * | 16.6 (2.3) |
10% Intensity | 20% Intensity | |||
---|---|---|---|---|
Without BFR | With BFR | Without BFR | With BFR | |
RPE | 10.7 (0.2) | 12.6 (0.5) † | 14.2 (0.4) †† | 15.7 (0.7) ††† |
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Share and Cite
Ishizaka, H.; Uematsu, A.; Mizushima, Y.; Nozawa, N.; Katayanagi, S.; Matsumoto, K.; Nishikawa, K.; Takahashi, R.; Arakawa, T.; Sawaguchi, T.; et al. Blood Flow Restriction Increases the Neural Activation of the Knee Extensors During Very Low-Intensity Leg Extension Exercise in Cardiovascular Patients: A Pilot Study. J. Clin. Med. 2019, 8, 1252. https://0-doi-org.brum.beds.ac.uk/10.3390/jcm8081252
Ishizaka H, Uematsu A, Mizushima Y, Nozawa N, Katayanagi S, Matsumoto K, Nishikawa K, Takahashi R, Arakawa T, Sawaguchi T, et al. Blood Flow Restriction Increases the Neural Activation of the Knee Extensors During Very Low-Intensity Leg Extension Exercise in Cardiovascular Patients: A Pilot Study. Journal of Clinical Medicine. 2019; 8(8):1252. https://0-doi-org.brum.beds.ac.uk/10.3390/jcm8081252
Chicago/Turabian StyleIshizaka, Hayato, Azusa Uematsu, Yuta Mizushima, Naohiro Nozawa, Satoshi Katayanagi, Kazuhisa Matsumoto, Kaori Nishikawa, Reiko Takahashi, Tomoe Arakawa, Tatsuya Sawaguchi, and et al. 2019. "Blood Flow Restriction Increases the Neural Activation of the Knee Extensors During Very Low-Intensity Leg Extension Exercise in Cardiovascular Patients: A Pilot Study" Journal of Clinical Medicine 8, no. 8: 1252. https://0-doi-org.brum.beds.ac.uk/10.3390/jcm8081252