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Blood flow restriction augments the skeletal muscle response during very low-load resistance exercise to volitional failure.
Physiol Int. 2019 Jun 01; 106(2):180-193.PI

Abstract

The purpose of this study was to compare the acute muscular response with resistance exercise between the following conditions [labeled (% one-repetition maximum/% arterial occlusion pressure)]: high-load (70/0), very low-load (15/0), very low-load with moderate (15/40), and high (15/80) blood flow restriction pressures. Twenty-three participants completed four sets of unilateral knee extension to failure (up to 90 repetitions) with each condition, one condition per leg, each day. Muscle thickness and maximal voluntary contraction (MVC) were measured before (Pre), immediately after (Post-0), and 15 min after (Post-15) exercise and electromyography (EMG) amplitude during exercise. Pre to Post-0 muscle thickness changes in cm [95% CI] were greater with 15/40 [0.57 (0.41, 0.73)] and 15/80 [0.49 (0.35, 0.62)] compared to 70/0 [0.33 (0.25, 0.40)]. Pre to Post-0 MVC changes in Nm [95% CI] were higher with 15/40 [-127.0 (-162.1, -91.9)] and 15/80 [-133.6 (-162.8, -104.4)] compared to 70/0 [-48.4 (-70.1, -26.6)] and 15/0 [-98.4 (-121.9, -74.9)], which were also different. Over the first three repetitions, EMG increased across sets, whereas in the last three repetitions it did not. EMG was also different between conditions and was generally greater during 70/0. Repetitions decreased across sets reaching the lowest for 70/0, and for very low loads decreased with increased pressure. In trained participants exercising to failure, lower load and the application of restriction pressure augment changes in muscle thickness and torque. The EMG amplitude was augmented by load. Training studies should compare these conditions, as the results herein suggest some muscular adaptations may differ.

Authors+Show Affiliations

1 School of Kinesiology and Nutrition, The University of Southern Mississippi , Hattiesburg, MS, USA.2 Exercise Science Program, University of South Florida , Tampa, FL, USA.3 Department of Exercise Science, Lindenwood University-Belleville , Belleville, IL, USA.4 Kevser Ermin Applied Physiology Laboratory, Department of Health, Exercise Science, and Recreation Management, The University of Mississippi , University, MS, USA.5 Department of Kinesiology and Health Promotion, Troy University , Troy, AL, USA.4 Kevser Ermin Applied Physiology Laboratory, Department of Health, Exercise Science, and Recreation Management, The University of Mississippi , University, MS, USA.4 Kevser Ermin Applied Physiology Laboratory, Department of Health, Exercise Science, and Recreation Management, The University of Mississippi , University, MS, USA.4 Kevser Ermin Applied Physiology Laboratory, Department of Health, Exercise Science, and Recreation Management, The University of Mississippi , University, MS, USA.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31262205

Citation

Jessee, M B., et al. "Blood Flow Restriction Augments the Skeletal Muscle Response During Very Low-load Resistance Exercise to Volitional Failure." Physiology International, vol. 106, no. 2, 2019, pp. 180-193.
Jessee MB, Buckner SL, Mattocks KT, et al. Blood flow restriction augments the skeletal muscle response during very low-load resistance exercise to volitional failure. Physiol Int. 2019;106(2):180-193.
Jessee, M. B., Buckner, S. L., Mattocks, K. T., Dankel, S. J., Mouser, J. G., Bell, Z. W., Abe, T., & Loenneke, J. P. (2019). Blood flow restriction augments the skeletal muscle response during very low-load resistance exercise to volitional failure. Physiology International, 106(2), 180-193. https://doi.org/10.1556/2060.106.2019.15
Jessee MB, et al. Blood Flow Restriction Augments the Skeletal Muscle Response During Very Low-load Resistance Exercise to Volitional Failure. Physiol Int. 2019 Jun 1;106(2):180-193. PubMed PMID: 31262205.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Blood flow restriction augments the skeletal muscle response during very low-load resistance exercise to volitional failure. AU - Jessee,M B, AU - Buckner,S L, AU - Mattocks,K T, AU - Dankel,S J, AU - Mouser,J G, AU - Bell,Z W, AU - Abe,T, AU - Loenneke,J P, Y1 - 2019/07/02/ PY - 2019/7/3/pubmed PY - 2019/7/3/medline PY - 2019/7/3/entrez KW - electromyography KW - fatigue KW - muscle thickness KW - occlusion KW - voluntary contraction SP - 180 EP - 193 JF - Physiology international JO - Physiol Int VL - 106 IS - 2 N2 - The purpose of this study was to compare the acute muscular response with resistance exercise between the following conditions [labeled (% one-repetition maximum/% arterial occlusion pressure)]: high-load (70/0), very low-load (15/0), very low-load with moderate (15/40), and high (15/80) blood flow restriction pressures. Twenty-three participants completed four sets of unilateral knee extension to failure (up to 90 repetitions) with each condition, one condition per leg, each day. Muscle thickness and maximal voluntary contraction (MVC) were measured before (Pre), immediately after (Post-0), and 15 min after (Post-15) exercise and electromyography (EMG) amplitude during exercise. Pre to Post-0 muscle thickness changes in cm [95% CI] were greater with 15/40 [0.57 (0.41, 0.73)] and 15/80 [0.49 (0.35, 0.62)] compared to 70/0 [0.33 (0.25, 0.40)]. Pre to Post-0 MVC changes in Nm [95% CI] were higher with 15/40 [-127.0 (-162.1, -91.9)] and 15/80 [-133.6 (-162.8, -104.4)] compared to 70/0 [-48.4 (-70.1, -26.6)] and 15/0 [-98.4 (-121.9, -74.9)], which were also different. Over the first three repetitions, EMG increased across sets, whereas in the last three repetitions it did not. EMG was also different between conditions and was generally greater during 70/0. Repetitions decreased across sets reaching the lowest for 70/0, and for very low loads decreased with increased pressure. In trained participants exercising to failure, lower load and the application of restriction pressure augment changes in muscle thickness and torque. The EMG amplitude was augmented by load. Training studies should compare these conditions, as the results herein suggest some muscular adaptations may differ. SN - 2498-602X UR - https://www.unboundmedicine.com/medline/citation/31262205/Blood_flow_restriction_augments_the_skeletal_muscle_response_during_very_low_load_resistance_exercise_to_volitional_failure_ L2 - http://www.akademiai.com/doi/full/10.1556/2060.106.2019.15?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -