Effects of Pre-Exercise Nutrition Strategies on Body Temperature and Thermoregulatory Responses

NCT02814188 | Completed

• 1 other identifier: 892213-3
• Study Type: interventional
• Target: 37
• Locations: 1 country
• Sites: 1

Brief Summary

Carbohydrate ingestion, in particular fructose, has been shown in a handful of previous studies to elicit a thermic effect and increase core body temperature after ingestion. Carbohydrate foods and supplements are commonly consumed prior to endurance running competition, including situations where an athlete's ability to dissipate body heat is compromised. Thus, there is some potential for pre-exercise carbohydrate ingestion to have a deleterious effect on body heat regulation in hot and humid environments. Thus, this projects aims to study the effects of pre-exercise carbohydrate ingestion on core body temperature, perceived thermal stress, and perceived exertion during high-intensity running.

Conditions

Impaired Thermoregulation

Keywords

Exercise

Outcome Measures

Primary Outcomes (1)

• Core Body Temperature

  Core body temperature will be measured with a ingestible pill thermometer. Readings will be taken during a 60 minute rest period and at 1-km intervals during a 5-km run.

  80 minutes (60, 50, 40, 30, 20, and 10 min pre-run and at 1-km intervals during a 20 min 5-km run)

Secondary Outcomes (3)

• Thermal Sensation Scale

  80 minutes (60, 50, 40, 30, 20, and 10 min pre-run and at 1-km intervals during a 20 min 5-km run)

• Feeling Scale

  80 minutes (60, 50, 40, 30, 20, and 10 min pre-run and at 1-km intervals during a 20 min 5-km run)

• Rating of Perceived Exertion

  80 minutes (60, 50, 40, 30, 20, and 10 min pre-run and at 1-km intervals during a 20 min 5-km run)

Study Arms (2)

Carbohydrate Beverage

EXPERIMENTAL

Other: Carbohydrate Beverage

Placebo Beverage

PLACEBO COMPARATOR

Other: Placebo Beverage

Interventions

Carbohydrate Beverage OTHER

750 ml of a 13.5% carbohydrate (sucrose) beverage

Carbohydrate Beverage

Placebo Beverage OTHER

750 ml of an artificially-sweetened beverage

Placebo Beverage

Eligibility Criteria

• Age: 18 Years - 65 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Be currently running ≥20 miles per week
• Have a projected 5-km maximal effort running time between 16:00-23:00 minutes

You may not qualify if:

• Any gastrointestinal disorders that cause swallowing problems or frequent nausea/vomiting

Sponsors & Collaborators

• Old Dominion University: lead

Study Sites (1)

Human Performance Laboratory

Norfolk, Virginia, 23529, United States

Location

MeSH Terms

Conditions

Motor Activity

Condition Hierarchy (Ancestors)

Behavior

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: DOUBLE
• Who Masked: PARTICIPANT, INVESTIGATOR
• Purpose: BASIC SCIENCE
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Assistant Professor of Exercise Science

Study Record Dates

• First Submitted: June 20, 2016
• First Posted: June 27, 2016
• Study Start: June 1, 2016
• Primary Completion: September 1, 2017
• Study Completion: September 1, 2017
• Last Updated: December 15, 2017

Record last verified: 2017-12

Data Sharing

• IPD Sharing: Will not share

Locations

US (1)