A variety of dietary choices are marketed to enhance glycogen recovery after physical activity. Past research provides recommendations regarding the timing, dose, and nutrient compositions to facilitate glycogen resynthesis. This study examined the effects of isocaloric sport supplements (SS) vs fast-food (FF) on glycogen resynthesis and exercise performance. Eleven male completed two experimental trials in a randomized, counterbalanced order. Each trial included a 90-minute glycogen depletion ride followed by a 4-hour recovery period. Absolute amounts of macronutrients (1.54±0.27 g.kg-1 carbohydrate, 0.24±0.04 g.kg-1 fat, and 0.18±0.03 g.kg-1 protein) as either SS or FF were provided at 0 and 2 hours. Muscle biopsies were collected from the vastus lateralis at 0 and 4 hours post exercise. Blood samples were obtained at 0, 30, 60, 120, 150, 180, and 240 minutes post exercise for insulin, glucose and blood lipids. A 20k time-trial (TT) was completed following the final muscle biopsy. There were no differences in the blood glucose and insulin responses. Similarly, rates of glycogen resynthesis were not different across the diets (6.9±1.7 and 7.9±2.4 mmol·kg-1·h-1 for SS and FF, respectively). There were also no differences across the diets for TT performance (34.1±1.8 and 34.3±1.7 minutes for SS and FF, respectively. These data indicate that short-term food options to initiate glycogen resynthesis can include a wide range of dietary options when total macronutrient composition is balanced.
| Identifer | oai:union.ndltd.org:MONTANA/oai:etd.lib.umt.edu:etd-06102014-183050 |
| Date | 26 June 2014 |
| Creators | Cramer, Michael Joseph |
| Contributors | Charles L. Dumke, J. Stephen Lodmell, Brent C. Ruby |
| Publisher | The University of Montana |
| Source Sets | University of Montana Missoula |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.umt.edu/theses/available/etd-06102014-183050/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to University of Montana or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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