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Muscle oxygenation, endocrine and metabolic regulation during low-intensity endurance exercise with blood flow restriction

[PURPOSE]: The present study investigated the effect of endurance exercise with blood flow restriction (BFR) performed at either 25% maximal oxygen uptake ([Formula: see text] max) or 40% [Formula: see text] max) on muscle oxygenation, energy metabolism, and endocrine responses. [METHODS]: Ten males...

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Autores principales: Hwang, Hyejung, Mizuno, Sahiro, Kasai, Nobukazu, Kojima, Chihiro, Sumi, Daichi, Hayashi, Nanako, Goto, Kazushige
Formato: Online Artículo Texto
Lenguaje:English
Publicado: 한국운동영양학회 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7451842/
https://www.ncbi.nlm.nih.gov/pubmed/32698259
http://dx.doi.org/10.20463/pan.2020.0012
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author Hwang, Hyejung
Mizuno, Sahiro
Kasai, Nobukazu
Kojima, Chihiro
Sumi, Daichi
Hayashi, Nanako
Goto, Kazushige
author_facet Hwang, Hyejung
Mizuno, Sahiro
Kasai, Nobukazu
Kojima, Chihiro
Sumi, Daichi
Hayashi, Nanako
Goto, Kazushige
author_sort Hwang, Hyejung
collection PubMed
description [PURPOSE]: The present study investigated the effect of endurance exercise with blood flow restriction (BFR) performed at either 25% maximal oxygen uptake ([Formula: see text] max) or 40% [Formula: see text] max) on muscle oxygenation, energy metabolism, and endocrine responses. [METHODS]: Ten males were recruited in the present study. The subjects performed three trials: (1) endurance exercise at 40% [Formula: see text] max without BFR (NBFR40), (2) endurance exercise at 25% [Formula: see text] max with BFR (BFR25), and (3) endurance exercise at 40% [Formula: see text] max with BFR (BFR40). The exercises were performed for 15 min during which the pedaling frequency was set at 70 rpm. In BFR25 and BFR40, 2 min of pressure phase (equivalent to 160 mmHg) followed by 1 min of release phase were repeated five times (5 × 3 min) throughout 15 minutes of exercise. During exercise, muscle oxygenation and concentration of respiratory gases were measured. The blood samples were collected before exercise, immediately after 15 min of exercise, and at 15, 30, and 60 minutes after completion of exercise. [RESULTS]: Deoxygenated hemoglobin (deoxy-Hb) level during exercise was significantly higher with BFR25 and BFR40 than that with NBFR40. BFR40 showed significantly higher total-hemoglobin (total-Hb) than NBFR40 during 2 min of pressure phase. Moreover, exercise-induced lactate elevation and pH reduction were significantly augmented in BFR40, with concomitant increase in serum cortisol concentration after exercise. Carbohydrate (CHO) oxidation was significantly higher with BFR40 than that with NBFR40 and BFR25, whereas fat oxidation was lower with BFR40. [CONCLUSION]: Deoxy-Hb and total Hb levels were significantly increased during 15 min of pedaling exercise in BFR25 and BFR40, indicating augmented local hypoxia and blood volume (blood perfusion) in the muscle. Moreover, low-and moderate-intensity exercise with BFR facilitated CHO oxidation.
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spelling pubmed-74518422020-09-01 Muscle oxygenation, endocrine and metabolic regulation during low-intensity endurance exercise with blood flow restriction Hwang, Hyejung Mizuno, Sahiro Kasai, Nobukazu Kojima, Chihiro Sumi, Daichi Hayashi, Nanako Goto, Kazushige Phys Act Nutr Original Articles [PURPOSE]: The present study investigated the effect of endurance exercise with blood flow restriction (BFR) performed at either 25% maximal oxygen uptake ([Formula: see text] max) or 40% [Formula: see text] max) on muscle oxygenation, energy metabolism, and endocrine responses. [METHODS]: Ten males were recruited in the present study. The subjects performed three trials: (1) endurance exercise at 40% [Formula: see text] max without BFR (NBFR40), (2) endurance exercise at 25% [Formula: see text] max with BFR (BFR25), and (3) endurance exercise at 40% [Formula: see text] max with BFR (BFR40). The exercises were performed for 15 min during which the pedaling frequency was set at 70 rpm. In BFR25 and BFR40, 2 min of pressure phase (equivalent to 160 mmHg) followed by 1 min of release phase were repeated five times (5 × 3 min) throughout 15 minutes of exercise. During exercise, muscle oxygenation and concentration of respiratory gases were measured. The blood samples were collected before exercise, immediately after 15 min of exercise, and at 15, 30, and 60 minutes after completion of exercise. [RESULTS]: Deoxygenated hemoglobin (deoxy-Hb) level during exercise was significantly higher with BFR25 and BFR40 than that with NBFR40. BFR40 showed significantly higher total-hemoglobin (total-Hb) than NBFR40 during 2 min of pressure phase. Moreover, exercise-induced lactate elevation and pH reduction were significantly augmented in BFR40, with concomitant increase in serum cortisol concentration after exercise. Carbohydrate (CHO) oxidation was significantly higher with BFR40 than that with NBFR40 and BFR25, whereas fat oxidation was lower with BFR40. [CONCLUSION]: Deoxy-Hb and total Hb levels were significantly increased during 15 min of pedaling exercise in BFR25 and BFR40, indicating augmented local hypoxia and blood volume (blood perfusion) in the muscle. Moreover, low-and moderate-intensity exercise with BFR facilitated CHO oxidation. 한국운동영양학회 2020-06-30 /pmc/articles/PMC7451842/ /pubmed/32698259 http://dx.doi.org/10.20463/pan.2020.0012 Text en ©2020 The Korean Society for Exercise Nutrition ©2020 Hyejung Hwang et al.; Licence Physical Activity and Nutrition. This is an open access article distributed under the terms of the creative commons attribution license (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the orginal work is properly cited.
spellingShingle Original Articles
Hwang, Hyejung
Mizuno, Sahiro
Kasai, Nobukazu
Kojima, Chihiro
Sumi, Daichi
Hayashi, Nanako
Goto, Kazushige
Muscle oxygenation, endocrine and metabolic regulation during low-intensity endurance exercise with blood flow restriction
title Muscle oxygenation, endocrine and metabolic regulation during low-intensity endurance exercise with blood flow restriction
title_full Muscle oxygenation, endocrine and metabolic regulation during low-intensity endurance exercise with blood flow restriction
title_fullStr Muscle oxygenation, endocrine and metabolic regulation during low-intensity endurance exercise with blood flow restriction
title_full_unstemmed Muscle oxygenation, endocrine and metabolic regulation during low-intensity endurance exercise with blood flow restriction
title_short Muscle oxygenation, endocrine and metabolic regulation during low-intensity endurance exercise with blood flow restriction
title_sort muscle oxygenation, endocrine and metabolic regulation during low-intensity endurance exercise with blood flow restriction
topic Original Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7451842/
https://www.ncbi.nlm.nih.gov/pubmed/32698259
http://dx.doi.org/10.20463/pan.2020.0012
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