Event Title

Dietary Macronutrient Alterations and Their Effect on Glycogen Loading and Exercise Performance

Location

CSU Ballroom

Start Date

20-4-2015 2:00 PM

End Date

20-4-2015 3:30 PM

Student's Major

Family Consumer Science

Student's College

Allied Health and Nursing

Mentor's Name

Susan Fredstrom

Mentor's Email Address

susan.fredstrom@mnsu.edu

Mentor's Department

Family Consumer Science

Mentor's College

Allied Health and Nursing

Second Mentor's Name

Robert Pettitt

Second Mentor's Email Address

robert.pettitt@mnsu.edu

Second Mentor's Department

Human Performance

Second Mentor's College

Allied Health and Nursing

Description

A multitude of studies have been conducted to assess the effects of high carbohydrate (CHO) and low fat diets on exercise economy and physical endurance during maximal and sub-maximal exercise tests. However, few studies have examined the extent to which augmentation of subjects’ normal dietary macronutrient intake in the days immediately preceding exercise might impact exercise economy and tolerance beyond the effects seen in high CHO diets alone. Further research into pre-exercise dietary changes could allow for increased dietary personalization for all athletes. This study examined the normal dietary intake of 30 male subjects between the ages of 18 and 35. Assessment of normal macronutrient intake using three-day food records kept by each subject immediately preceding exercise tests were completed using the Food Processor analysis program. Individual glycogen-loaded (GL) protocols augmented each subject’s intake to at least 70% of their total Calories from CHO, while consuming an isocaloric diet. Each subject performed a threeminute maximal exercise test to determine baseline fitness and performance. Two subsequent submaximal exercise tests to exhaustion were performed with a minimum of one week between each test. The first test measured exercise performed while glycogen-depleted and was done after normal intake while the second was performed following GL. Differences in exercise economy and tolerance will be compared between trials and subjects to determine if the degree to which alteration of normal CHO intake had on these parameters of exercise.

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Apr 20th, 2:00 PM Apr 20th, 3:30 PM

Dietary Macronutrient Alterations and Their Effect on Glycogen Loading and Exercise Performance

CSU Ballroom

A multitude of studies have been conducted to assess the effects of high carbohydrate (CHO) and low fat diets on exercise economy and physical endurance during maximal and sub-maximal exercise tests. However, few studies have examined the extent to which augmentation of subjects’ normal dietary macronutrient intake in the days immediately preceding exercise might impact exercise economy and tolerance beyond the effects seen in high CHO diets alone. Further research into pre-exercise dietary changes could allow for increased dietary personalization for all athletes. This study examined the normal dietary intake of 30 male subjects between the ages of 18 and 35. Assessment of normal macronutrient intake using three-day food records kept by each subject immediately preceding exercise tests were completed using the Food Processor analysis program. Individual glycogen-loaded (GL) protocols augmented each subject’s intake to at least 70% of their total Calories from CHO, while consuming an isocaloric diet. Each subject performed a threeminute maximal exercise test to determine baseline fitness and performance. Two subsequent submaximal exercise tests to exhaustion were performed with a minimum of one week between each test. The first test measured exercise performed while glycogen-depleted and was done after normal intake while the second was performed following GL. Differences in exercise economy and tolerance will be compared between trials and subjects to determine if the degree to which alteration of normal CHO intake had on these parameters of exercise.

Recommended Citation

Johnson, Patrick. "Dietary Macronutrient Alterations and Their Effect on Glycogen Loading and Exercise Performance." Undergraduate Research Symposium, Mankato, MN, April 20, 2015.
http://cornerstone.lib.mnsu.edu/urs/2015/poster_session_B/18