Year of Award


Document Type


Degree Type

Master of Science (MS)

Degree Name

Health and Human Performance (Exercise Science Option)

Department or School/College

Health and Human Performance

Committee Chair

Brent Ruby

Commitee Members

Brent Ruby, John Quindry, Rich Willy


Glycogen recovery, glycogen re-synthesis, post-exercise recovery, sex differences, sports supplements, potatoes


University of Montana

Subject Categories

Sports Sciences



Research has elucidated the impact of post exercise carbohydrate nutrition and environmental conditions on muscle glycogen re-synthesis. However, research has minimally considered the implications of glycogen recovery in females and has focused on commercial sport nutrition products. The purpose of this study was to determine the effects of varied mixed macronutrient feedings on glycogen recovery and subsequent exercise performance in both sexes.


8 males and 8 females participated in a crossover study. Subjects completed a 90-minute cycling glycogen depletion trial then rested for 4 hours. Two carbohydrate feedings (1.6 g . kg-1) of either sport supplements or potato-based products were delivered at 0 and 2 hours post exercise. Muscle biopsies and blood samples (glucose, insulin) were collected during the recovery. Afterwards, subjects completed a 20km cycling time trial.


There was no difference between sexes or trials for glycogen recovery rates (male: 7.9 ± 2.7, female: 8.2 ± 2.7, potato-based: 8.0 ± 2.5, sport supplement: 8.1 ± 3.1 mM . kg wet wt-1 hr-1, p > 0.05). Time trial performance was not different between diets (38.3 ± 4.4 and 37.8 ± 3.9 minutes for potato and sport supplement, respectively, p > 0.05).


These results indicate that food items, such as potato-based products, can be as effective as commercially marketed sports supplements when developing glycogen recovery oriented menus and that carbohydrate dose feedings (g . kg- 1) can be applied to both males and females.



© Copyright 2019 Shannon Kelly Flynn