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NCT Number: NCT07836673

Pre-Exercise Whey and Pea Protein in Adolescents With Type 1 Diabetes

The goal of this clinical trial is to learn whether drinking whey protein or pea protein before exercise affects blood sugar levels and appetite in adolescents with type 1 diabetes. The study will also compare two different amounts of each type of protein.

The main questions this study aims to answer are:

* Does drinking whey or pea protein before exercise affect blood sugar levels during and after moderate-intensity exercise? * Does the amount of protein consumed before exercise affect blood sugar levels? * Does whey or pea protein affect feelings of hunger, fullness, and satiety after exercise?

Researchers will compare four conditions: a low and moderate amount of whey protein and a low and moderate amount of pea protein. Each participant will complete all four conditions on separate study visits, allowing researchers to compare the effects within the same person.

Participants will:

* Drink a protein beverage 45 min before exercise. * Complete 45 min moderate-intensity aerobic exercise under supervision. * Wear a continuous glucose monitor to measure blood sugar levels during and after exercise. * Report their feelings of hunger, fullness, and satiety at several times during the study. * Follow the same general food, physical activity, and diabetes management instructions before each study visit.

The study may help researchers understand whether the type and amount of protein consumed before exercise can help manage blood sugar levels and appetite around exercise in adolescents with type 1 diabetes.

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Key information

Conditions

T1D T1DM

Age range

12 year–18 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Who can participate

Healthy volunteers accepted: No

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

Inclusion criteria

  • Male and female adolescents with T1D
  • Age: 12-18 years
  • T1D duration ≥ 1 year and HbA1c <10%
  • BMI-for Age- z-score between -2 and +2
  • Able to complete 45 min moderate-intensity aerobic exercise
  • Using CGM or willing / able to wear study CGM
  • Using multiple daily injections

Exclusion criteria

  • Medical comorbidities (celiac disease and thyroid disease),
  • Diabetes complications or gastroparesis,
  • milk protein allergy or eating disorders,
  • severe hypo/ diabetic ketoacidosis in the past 3 months
  • Age: <12 or > 18 years
  • T1D duration < 1 year or HbA1c ≥10%
  • BMI -for Age- z-score < -2 or > +2
  • Unable to exercise safely (physical limitations, intellectual disability, autism, mental health conditions)
  • Not using/willing/able to use CGM
  • Using once daily/mixed insulin regimens

Treatment and study plan

low whey protein

Dietary Supplement

Participants will consume a whey protein beverage providing 0.25 g of protein per kg of body weight, 45 minutes before moderate-intensity aerobic exercise. They will then complete the standardized exercise session under supervision. Glucose levels and appetite will be monitored during and after exercise.

moderate whey protein

Dietary Supplement

Participants will consume a whey protein beverage providing the moderate prespecified dose of protein per kg of body weight, 45 minutes before moderate-intensity aerobic exercise. They will then complete the standardized exercise session under supervision. Glucose levels and appetite will be monitored during and after exercise.

low Pea protein

Dietary Supplement

Participants will consume a pea protein beverage providing 0.25 g of protein per kg of body weight, 45 minutes before moderate-intensity aerobic exercise. They will then complete the standardized exercise session under supervision. Glucose levels and appetite will be monitored during and after exercise.

Moderate Pea protein

Dietary Supplement

Participants will consume a pea protein beverage providing the moderate prespecified dose of protein per kg of body weight, 45 minutes before moderate-intensity aerobic exercise. They will then complete the standardized exercise session under supervision. Glucose levels and appetite will be monitored during and after exercise.

Primary outcomes

  1. Continuous blood glucose levels using CGM "FreeStyle Libre 2 sensor"

    Time frame: 3 hours

Secondary outcomes

  1. postprandial appetite using VAS

    Time frame: 3 hours

Interested in participating?

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Sponsors and collaborators

Lead sponsor

University of Jordan

Other

Registry information

Official study title

Effects of Pre-Exercise Whey and Pea Protein Intake on Glycemic Responses and Postprandial Appetite During and After Moderate-Intensity Aerobic Exercise in Jordanian Adolescents With Type 1 Diabetes: A Randomized Crossover Trial.

Important dates

Study start
2026
Primary completion
2027
Study completion
2027
First posted
Sep 23, 2026
Registry last updated
Sep 23, 2026

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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