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Completed

NCT Number: NCT04859491

Effect of Carbohydrate-protein Co-ingestion on Short-term Recovery

The purpose of this study is to determine whether the consumption of a carbohydrate, carbohydrate plus protein, or placebo sports drink during a 2-hour recovery period effectively moderates performance decrements during a subsequent bout of high-intensity exercise. This information will benefit any endurance-trained masters class athlete who may need to compete or train multiple times a day.

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Key information

Conditions

Dietary Supplementations

Age range

35 year–59 year

Sex eligibility

Male

Study type

Interventional

Phase

Not applicable

Primary location

University of Central Florida

Orlando, Florida, 32816, United States

About this study

To test the hypothesis, this study will utilize a randomized, double-blind, placebo-controlled between-subject design to examine the effects of carbohydrate (CHO) and carbohydrate-protein (CHO-P) supplementation on short-term recovery following aerobic interval exercise (INT) and time to exhaustion (TTE) testing in maters class athletes. After completing the informed consent and screening process (Visit #1), each participant will be assessed for their anthropometric measures as well as body composition and will complete a graded exercise test to volitional exhaustion on a cycle ergometer to determine VO2peak. Forty-eight to 72 hours after Visit #1, or VO2peak testing, participants will return to the lab for familiarization with the INT exercise protocol and TTE test (Visit #2). Within forty-eight to 72 hours after familiarization (Visit #2), participants will return to the lab for Visit #3 to complete INT exercise and TTE, a 2-hour passive recovery period including the consumption of one of three treatments (CHO, CHO-P, PLA), followed by repeated INT exercise and TTE, heart rate variability and sweat rate determination. Participants will also complete the Nutritional Recovery Practices, Knowledge, and Beliefs of Australian Triathletes survey during the 2-hour recovery period. Participants will be asked to complete the ASA24®, an automated self-administered 24-hour dietary assessment tool during the 5-9-day period between familiarization (Visit #2) and the experimental protocol (Visit #3).

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Men between the ages of 35 and 59 years
  • Free of any physical limitations as determined by the Exercise Preparticipation Health Screening Questionnaire for Exercise Professionals (PHSQEP), and a Physical Activity Readiness Questionnaire for Everyone (PAR-Q+)
  • Regularly engaged in endurance exercise (running, cycling, swimming) for a minimum of three years, a weekly training volume of 5-10 hours, and a maximal oxygen uptake of 45.00 ml·kg-1·min-1 or higher as determined by completion of VO2peak assessment (Visit #1).

Exclusion criteria

  • Recent musculoskeletal injuries or surgeries
  • Any chronic illness that requires continuous medical care
  • Current incarceration, cognitive impairment or inability to provide consent
  • Present or past use of performance-enhancing drugs

Treatment and study plan

Carbohydrate

Dietary Supplement

Participants have a one in three chance of consuming a carbohydrate beverage between two bouts of high-intensity exercise.

Other names: CHO

Carbohydrate-Protein

Dietary Supplement

Participants have a one in three chance of consuming a carbohydrate-protein beverage between two bouts of high-intensity exercise.

Other names: CHO-P

Placebo

Dietary Supplement

Participants have a one in three chance of consuming a placebo beverage between two bouts of high-intensity exercise.

Other names: PLA

Primary outcomes

  1. Time to Exhaustion (TTE)

    Time frame: Visit #3 (Day 7)

    Participants cycle for as long as possible at 90% of peak power output (watts)

Secondary outcomes

  1. Heart Rate Variability (HRV)

    Time frame: Visit #3 (Day 7)

    R-R intervals recorded via a heart rate monitor and Elite HRV will be downloaded and analyzed using a laptop with commercially available HRV analysis software. Root mean square of the successive differences of R-R intervals (RMSSD) values will be recorded during the 90% TTE and then post-exercise every 5 min (end of TTE, 5min, 10min, 15min, 20min, 25min, 30min).

  2. Sweat Rate (SR)

    Time frame: Visit #3 (Day 7)

    Sweat rate will be determined based on the difference between pre-and post-weight changes for each bout of exercise, the amount of fluid consumed during the recovery period, and total exercise time in minutes.

Sponsors and collaborators

Lead sponsor

Erica Goldstein

Other

Registry information

Official study title

Effects of Post-Exercise Recovery Drink Composition on Subsequent Performance in Masters Class Athletes

Important dates

Study start
2021
Primary completion
2021
Study completion
2021
First posted
Apr 26, 2021
Registry last updated
May 17, 2022

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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