The Role of Carbohydrate Blends and Electrolytes on Physical and Mental Performance During Cycling in the Heat
CARB-HEAT
1 other identifier
interventional
14
1 country
1
Brief Summary
The aim of the present study is to evaluate the effectiveness of a milk permeate-based sports drink on hydration, carbohydrate oxidation, exercise performance, vigilance, and reaction time in the heat. We anticipate that the milk permeate, with 44 g per liter and high sodium and potassium, will lead to better hydration, energy delivery, and physical and cognitive performance.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at below P25 for not_applicable
Started Jun 2026
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
Click on a node to explore related trials.
Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
June 10, 2026
CompletedFirst Posted
Study publicly available on registry
June 22, 2026
CompletedStudy Start
First participant enrolled
June 22, 2026
CompletedPrimary Completion
Last participant's last visit for primary outcome
March 30, 2027
ExpectedStudy Completion
Last participant's last visit for all outcomes
December 31, 2027
June 22, 2026
June 1, 2026
9 months
June 10, 2026
June 17, 2026
Conditions
Keywords
Outcome Measures
Primary Outcomes (2)
Time to completion of 5 kilometer cycling time trial
cycling performance expressed as time to completion.
Five minutes after completion of the two-hour cycling protocol
Psycho-motor Vigilance test
Psycho-motor Vigilance test measured by reaction time in milliseconds
Five minutes after completion of the 5-kilometer cycling test
Secondary Outcomes (2)
Plasma Osmolality
Plasma osmolality at 0, 30, 60, 90, and 120 minutes of the 2-hour steady cycling, at the end of the 5-kilometer cycling time trial, and within 2 minutes after the cognitive test.
Carbohydrate oxidation rate during exercise
At minutes 15, 60, and 120 of the 2-h steady-state cycling exercise
Study Arms (4)
Placebo
PLACEBO COMPARATORno caloric, no sodium containing flavor water
Carbohydrate Milk Permeate sports drink
EXPERIMENTALGoodSport sports drink
Traditional Sports drink with 6% carbs
EXPERIMENTALGatorade sports drink
Low Carbohydrate Milk Permeate sports drink
EXPERIMENTALLowCarb GoodSport sports drink
Interventions
4.4% carbohydrate sports drink
Gatorade with 6% carbohydrate content
2.2% Carbohydrate Milk Permeate sports drink
Eligibility Criteria
You may qualify if:
- Healthy and injury free (muscle, skeletal) for greater than 2 months
- Active cyclists who train at least 3 times per week
- Body mass index (BMI) range of 18.5-30 kg/m2
- VO₂max ≥ 51 mL/kg/min for male participants
- VO₂max ≥ 45 mL/kg/min for female participants
You may not qualify if:
- Taking medicine influences the cardiovascular system
- non-steroidal anti-inflammatory drugs during the last week
- Cancer Diagnosis during the last 5 years
- Current Pregnancy
- History of renal disease, hypertension, obstructive gastrointestinal tract disease, disorders or impairment of the gag reflex, previous gastrointestinal surgery
- History of heat stroke
- Use of testosterone therapy
- Adults who are unable to consent (impaired decision-making capacity)
- Adults having Felinization of the esophagus
- Adults who will undergo Nuclear Magnetic Resonance (NMR) or MRI scanning within 3 days of swallowing a temperature sensitive pills
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (1)
850 Phoenix Bioscience Core
Phoenix, Arizona, 85004, United States
MeSH Terms
Conditions
Interventions
Condition Hierarchy (Ancestors)
Intervention Hierarchy (Ancestors)
Central Study Contacts
Study Design
- Study Type
- interventional
- Phase
- not applicable
- Allocation
- RANDOMIZED
- Masking
- SINGLE
- Who Masked
- PARTICIPANT
- Purpose
- OTHER
- Intervention Model
- CROSSOVER
- Sponsor Type
- OTHER
- Responsible Party
- PRINCIPAL INVESTIGATOR
- PI Title
- Professor
Study Record Dates
First Submitted
June 10, 2026
First Posted
June 22, 2026
Study Start
June 22, 2026
Primary Completion (Estimated)
March 30, 2027
Study Completion (Estimated)
December 31, 2027
Last Updated
June 22, 2026
Record last verified: 2026-06
Data Sharing
- IPD Sharing
- Will not share