Previous investigations have utilized extremes of diet and exercise during the week prior to a performance to raise muscle glycogen levels to 220 mmoles/kg wet tissue. This investigation was designed to determine if muscle glycogen levels can be supercompensated utilizing a combination of a depletion-taper sequence and diets of 15% carbohydrate (CHO, LC), 50% CHO (M), and 70% CHO (HC) in 3,000 kcal. Each depletion-taper sequence was conducted on a treadmill at 73% V02max and consisted of runs of 90, 40, 40, 20, 20 minutes and a day of rest on the six days prior to a 13 mile performance run. Trial C consisted of 3 days LC and 3 days HC; Trial B, consisted of 3 days M and 3 days HC; and Trial C, 6 days M. Muscle biopsies were obtained from the gastrocnemius prior to loading (day 4) and before and after the performance run. Trials A, B and C elevated muscle glycogen to 207, 203 and 160 mmoles/ kg wet tissue, respectively. Trials A and B resulted in significantly more glycogen utilization (105 and 107 mmoles/kg wet tissue, respectively) than did Trial C (65 mmoles/kg wet tissue). The times during the performance runs were not significantly different between the Trials. It is concluded that: 1. muscle glycogen levels can be supercompensated to levels comparable to previous investigations by employing a depletion-tapering sequence and less severe alteration in diet prior to competition; 2. carbohydrate loading is not necessary for trained runners preparing for a race of 13 miles.Supported by the National Dairy Council and the Ball State University Graduate Student Research Fund, 1980.Ball State UniversityMuncie, IN 47306
| Identifer | oai:union.ndltd.org:BSU/oai:cardinalscholar.bsu.edu:handle/182271 |
| Date | 03 June 2011 |
| Creators | Sherman, William M. |
| Contributors | Costill, David L. |
| Source Sets | Ball State University |
| Detected Language | English |
| Format | xii, 124 leaves; 28 cm. |
| Source | Virtual Press |
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