Abstract

Carbohydrate (CHO) and carbohydrate-protein coingestion (CHO-P) have been shown to be equally effective for enhancing glycogen resynthesis and subsequent same-day performance when CHO intake is suboptimal (≤0.8 g/kg). Few studies have specifically examined the effect of isocaloric CHO vs CHO-P consumption on subsequent high-intensity aerobic performance with limited time to recover (≤2 hours) in masters class endurance athletes. Participants (n = 22) were assigned to consume one of three beverages during a 2-hour recovery period: PLA (electrolytes and water), CHO (1.2 g/kg bm), or CHO-P (0.8 g/kg bm CHO + 0.4 g/kg bm PRO). All beverages were standardized to one liter (~32 oz.) of total fluid volume regardless of treatment group. One liter of a standard ready to drink sports beverage contains ~58 g of CHO. CHO powder was weighed in grams via a digital food scale and added to the existing liter of fluid to reach the total amount of CHO needed if a participant required more than 58 g of CHO. During Visit#1, participants completed graded exercise testing (VO2peak; cycle ergometer). Familiarization (Visit#2) consisted of 5 x 4 min intervals at 70-80% of peak power output [PPO, watts] with 2 min of active recovery at 50W, followed by time to exhaustion [TTE] at 90% PPO. The same high-intensity interval protocol with TTE was conducted pre-and post-beverage consumption on Visit#3. The ANCOVA indicated a significant difference among the group means for the posttest TTE (F2,18= 6.702, p =.007, η2 =.427) values after adjusting for the pretest differences. Both CHO and CHO-P were effective in promoting an increase in TTE performance with limited time to recover in this sample of masters class endurance athletes.

Notes

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Graduation Date

2022

Semester

Summer

Advisor

Stout, Jeffrey

Degree

Doctor of Philosophy (Ph.D.)

College

College of Community Innovation and Education

Department

Learning Sciences and Educational Research

Degree Program

Education; Exercise Physiology

Identifier

CFE0009177; DP0026773

URL

https://purls.library.ucf.edu/go/DP0026773

Language

English

Release Date

August 2022

Length of Campus-only Access

None

Access Status

Doctoral Dissertation (Open Access)

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