Effects of carbohydrate and protein supplementation during resistance exercise on respiratory exchange ratio, blood glucose, and performance
Introduction: Athletes must determine whether they will benefit most from exercise in the fasted or fed state when discussing variables such as substrate oxidation, muscle anabolism, and performance. Objective: To determine the effects of a carbohydrate plus protein (C + P) beverage consumed during...
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| Format: | Article |
| Language: | English |
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Elsevier
2015-03-01
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| Series: | Journal of Clinical & Translational Endocrinology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214623714000428 |
| _version_ | 1818555518725128192 |
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| author | David M. Laurenson Danielle Jane Dubé |
| author_facet | David M. Laurenson Danielle Jane Dubé |
| author_sort | David M. Laurenson |
| collection | DOAJ |
| description | Introduction: Athletes must determine whether they will benefit most from exercise in the fasted or fed state when discussing variables such as substrate oxidation, muscle anabolism, and performance.
Objective: To determine the effects of a carbohydrate plus protein (C + P) beverage consumed during resistance exercise on respiratory exchange ratio (RER), blood glucose, and performance.
Methods: Ten resistance trained male subjects completed two bouts of exercise consisting of seven sets of squats and bench presses using 60% of their one repetition maximum (1RM). Subjects consumed C + P during one trial, and a non-caloric placebo (P) in the other. Six sets of each exercise were performed for a predetermined number of repetitions, followed by a seventh set of each exercise for as many repetitions as possible, performed as explosively as possible. Power was measured during the final set of each exercise. Glucose was measured pre, during, and post exercise. RER was measured seven times during each session.
Results: No significant difference in power was found. C + P resulted in significantly greater work in the bench press (p < 0.05), with no difference in the squat (p = 0.10). Post-exercise glucose was significantly greater (p < 0.05) in C + P vs. placebo. In C + P, post-exercise glucose was significantly greater (p < 0.05) than before or during exercise. For RER, a significant effect was found for time (p < 0.05), with no difference between conditions.
Conclusion: In active males, C + P ingestion during resistance exercise improved bench press performance and increased blood glucose, but does not appear to affect RER. |
| first_indexed | 2024-12-12T09:54:30Z |
| format | Article |
| id | doaj.art-06186e8cb63345c982c944033ee3597b |
| institution | Directory Open Access Journal |
| issn | 2214-6237 |
| language | English |
| last_indexed | 2024-12-12T09:54:30Z |
| publishDate | 2015-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Clinical & Translational Endocrinology |
| spelling | doaj.art-06186e8cb63345c982c944033ee3597b2022-12-22T00:28:11ZengElsevierJournal of Clinical & Translational Endocrinology2214-62372015-03-01211510.1016/j.jcte.2014.10.005Effects of carbohydrate and protein supplementation during resistance exercise on respiratory exchange ratio, blood glucose, and performanceDavid M. Laurenson0Danielle Jane Dubé1Department of Exercise Science and Sport Studies, Springfield College, Springfield, MA, USADepartment of Business, University of Connecticut, Hartford, CT, USAIntroduction: Athletes must determine whether they will benefit most from exercise in the fasted or fed state when discussing variables such as substrate oxidation, muscle anabolism, and performance. Objective: To determine the effects of a carbohydrate plus protein (C + P) beverage consumed during resistance exercise on respiratory exchange ratio (RER), blood glucose, and performance. Methods: Ten resistance trained male subjects completed two bouts of exercise consisting of seven sets of squats and bench presses using 60% of their one repetition maximum (1RM). Subjects consumed C + P during one trial, and a non-caloric placebo (P) in the other. Six sets of each exercise were performed for a predetermined number of repetitions, followed by a seventh set of each exercise for as many repetitions as possible, performed as explosively as possible. Power was measured during the final set of each exercise. Glucose was measured pre, during, and post exercise. RER was measured seven times during each session. Results: No significant difference in power was found. C + P resulted in significantly greater work in the bench press (p < 0.05), with no difference in the squat (p = 0.10). Post-exercise glucose was significantly greater (p < 0.05) in C + P vs. placebo. In C + P, post-exercise glucose was significantly greater (p < 0.05) than before or during exercise. For RER, a significant effect was found for time (p < 0.05), with no difference between conditions. Conclusion: In active males, C + P ingestion during resistance exercise improved bench press performance and increased blood glucose, but does not appear to affect RER.http://www.sciencedirect.com/science/article/pii/S2214623714000428InsulinDiabetesLipolysisSquatBench press |
| spellingShingle | David M. Laurenson Danielle Jane Dubé Effects of carbohydrate and protein supplementation during resistance exercise on respiratory exchange ratio, blood glucose, and performance Journal of Clinical & Translational Endocrinology Insulin Diabetes Lipolysis Squat Bench press |
| title | Effects of carbohydrate and protein supplementation during resistance exercise on respiratory exchange ratio, blood glucose, and performance |
| title_full | Effects of carbohydrate and protein supplementation during resistance exercise on respiratory exchange ratio, blood glucose, and performance |
| title_fullStr | Effects of carbohydrate and protein supplementation during resistance exercise on respiratory exchange ratio, blood glucose, and performance |
| title_full_unstemmed | Effects of carbohydrate and protein supplementation during resistance exercise on respiratory exchange ratio, blood glucose, and performance |
| title_short | Effects of carbohydrate and protein supplementation during resistance exercise on respiratory exchange ratio, blood glucose, and performance |
| title_sort | effects of carbohydrate and protein supplementation during resistance exercise on respiratory exchange ratio blood glucose and performance |
| topic | Insulin Diabetes Lipolysis Squat Bench press |
| url | http://www.sciencedirect.com/science/article/pii/S2214623714000428 |
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