Maintenance of adequate muscle glycogen stores has been shown to be essential for endurance performance. For athletes who train on successive days or twice in the same day it is especially important that feeding strategies result in optimal glycogen resynthesis between workouts. The purpose of this investigation was to determine if prior carbohydrate feedings and the form of the carbohydrate consumed affected subsequent endurance performance. Seven endurance trained male cyclists agreed to participate in this study. Each day of testing consisted of two exercise bouts. The first workout was an anaerobic workout consisting of five one minute efforts at 115% VO2max followed by a sprint ride to exhaustion. Each of the sprints was separated from the next by a four minute rest period. For the final ride, the subjects rode at 115% of VO2max. One hour following the completion of the first workout, the subjects began a feeding regimen in which one of four carbohydrate sources were ingested in an amount calculated to provide 1.5g carbohydrate/kg bodyweight/hr for the next four hours. The trials were grouped by carbohydrate forms, dense chewy solid (Powerbars) (DCS), liquid carbohydrate (Gatorlode) (LCHO), and semi-moist solid (Nabisco Snackwells and Fruit Newtons) (SMS). In addition, a water trial (W) was conducted to serve as a control The second workout occurred six hours after the completion of the anaerobic workout and consisted of a one-hour self-paced performance ride on a cycle ergometer. Performance was measured as work (U) performed during the ride. All carbohydrate forms (824.7±109.6 U) improved performance over water (782.0±121.7 U) (p<0.05). In addition, among the various carbohydrate forms, SMS (843.2±94.4 U) significantly improved performance over LCHO (807.3±141 U) and DCS (805.3±115 U) (p<0.05). Carbohydrate feedings between anaerobic and aerobic workouts in the same day improve performance. Also, the physical form of the carbohydrate influences performance. / School of Physical Education
| Identifer | oai:union.ndltd.org:BSU/oai:cardinalscholar.bsu.edu:handle/185303 |
| Date | January 1995 |
| Creators | Durham, William J. |
| Contributors | Ball State University. School of Physical Education., Pearson, David R. |
| Source Sets | Ball State University |
| Detected Language | English |
| Format | vii, 50 leaves : ill. ; 28 cm. |
| Source | Virtual Press |
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