Impact of Phosphorus Ingestion with Fructose and Glucose on Substrate Utilization in Active Individuals During Moderate Exercise

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

LBCTR

Registry ID

LBCTR2020104612

Enrollment

Registered

2020-10-15

Start date

2020-11-01

Completion date

Unknown

Last updated

2026-02-02

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Subjects are healthy and active. No health conditions being studied. Health problems being prevented are cardiovascular event (risk less than 1 in 12,000). This is ensured after a cardiac assessment and approval by a physician from the American University of Beirut Medical Center (AUBMC). N/A

Interventions

Four protocols will be tested on subjects after assessing their VO2 peak and FATMAX. 3.25 hours after a high carbohydrate meal, participants will ingest fructose, glucose (with or without phosphorus)

Subjects will come to the lab have a high carbohydrate meal (HCM) calculated according to each participant’s body needs: HCM (75% carbohydrates, 15% fat and 10% protein) will be calculated as 30% of e

glucose, fructose, phosphorus, carbohydrates

Eligibility

Sex/Gender

All

Age

18 Years to 35 Years

Inclusion criteria

Inclusion criteria: Healthy and Active American University of Beirut (AUB) students, Health Insurance Plan (HIP)-covered, non-obese and between the ages of 18 and 35 years.

Exclusion criteria

Exclusion criteria: Previous history of any limitation on physical ability, diabetes, cardiovascular disease (assessed by AUBMC physician), taking supplements or medicine that might affect their metabolic rate, pregnant or breastfeeding, claustrophobic, vegan/allergic to eggs or having unstable bodyweight during the past 6 months.

Design outcomes

Primary

Measure	Time frame
Name: Cardiorespiratory and metabolic responses;Timepoints: Before, during and after exercise ;Measure: Respiratory quotient (RQ);Name: Heart rate;Timepoints: Before, during and after exercise ;Measure: Heart rate (bpm);Name: Energy expenditure ;Timepoints: Before, during and after exercise ;Measure: Calories by Indirect calorimetry;Name: Fat oxidation grams / calories per minute, percentage energy from fat);Timepoints: During exercise ;Measure: FATMAX ;Name: Perceived exertion ;Timepoints: During exercise;Measure: The Borg Scale ;Name: Peak oxygen consumption ;Timepoints: During exercise ;Measure: VO2max	—

Measure

Time frame

Name: Cardiorespiratory and metabolic responses;Timepoints: Before, during and after exercise ;Measure: Respiratory quotient (RQ);Name: Heart rate;Timepoints: Before, during and after exercise ;Measure: Heart rate (bpm);Name: Energy expenditure ;Timepoints: Before, during and after exercise ;Measure: Calories by Indirect calorimetry;Name: Fat oxidation grams / calories per minute, percentage energy from fat);Timepoints: During exercise ;Measure: FATMAX ;Name: Perceived exertion ;Timepoints: During exercise;Measure: The Borg Scale ;Name: Peak oxygen consumption ;Timepoints: During exercise ;Measure: VO2max

—

Secondary

Measure	Time frame
Name: N/A;Timepoints: N/A;Measure: N/A	—

Countries

Lebanon

Contacts

Public ContactElie-Jacques Fares

AUB

ef08@aub.edu.lb+96179195509

Outcome results

None listed

Source: LBCTR (via WHO ICTRP) · Data processed: Feb 7, 2026