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Exercise-meal Timing and Postprandial Glucose Control

10 de diciembre de 2018 actualizado por: University of Birmingham

Maximizing Postprandial Glycaemic Control: When is the Right Time for Physical Activity

Physical activity helps maintain optimal postprandial blood glucose control. However, there is a lack of clear information regarding the optimal meal-activity timing required to maximize blood glucose control. By using continuous glucose monitoring (CGM), this randomized controlled trial will determine whether implementing a bout of physical activity immediately before, or immediately after, or shortly after a meal is most optimal. This study will also independently examine the effects of three different physical activities: walking, standing, and circuit-exercises. Minimizing the changes in blood glucose following a meal not only reduces the risk of type 2 diabetes but also reduces cardiovascular-related mortality. Therefore, the data produced by this project will have very important implications for informing healthcare policy and physical activity recommendations.

Descripción general del estudio

Estado

Terminado

Condiciones

Intervención / Tratamiento

Descripción detallada

Healthy volunteers will undergo an informed consent and screening visit to determine their eligibility. Participants who are included will then be assigned to one of the three studies (walking, standing, or circuit-exercises) and then come to the lab on 5 consecutive mornings to undergo a pre-trial visit and 4 experimental trial visits (A, B, C, and D). The order of the experimental trial visits will be randomized in a counter-balanced, cross-over design.

Screening visit: Having read the participant info sheet, a study investigator will discuss the project with the potential participant who will have the chance to ask any questions. Informed consent will be sought and a General Health and Physical Activity Questionnaire will be completed. Body weight, height, resting heart rate, blood pressure, and waist circumference will be measured, and blood measures of glycated hemoglobin, triglycerides, and cholesterol will be taken.

Pre-trials visit: Participants will come to the laboratory to receive an accelerometer physical activity monitor, a continuous glucose monitor, and to complete a physical activity bout (walking, standing, or stair climbing, depending on which study they are enrolled). Over the next 5 consecutive days, participants will be instructed to maintain their normal diet and activity habits, to record their dietary intake, to refrain from vigorous exercise and alcohol, and continue wearing the accelerometer and continuous glucose monitoring devices at all times.

Experimental trial A: Following an 8-10 hour overnight fast, participants will come to the lab and will be given a 500 calorie meal-replacement drink to consume within 10 minutes. They will remain in a seated position for 2 hours and then complete the physical activity bout (30-min walk, 30-min stand, or 10-min circuit-exercises) after which they may leave the lab. Resting and post-activity heart rate and blood pressure will be recorded.

Experimental trial B: Following an 8-10 hour overnight fast, participants will come to the lab and complete the physical activity bout. Immediately after this they will be given a 500 calorie meal-replacement drink to consume within 10 minutes and will remain in a seated position for 2 hours, after which they may leave the lab. Resting and post-activity heart rate and blood pressure will be recorded.

Experimental trial C: Following an 8-10 hour overnight fast, participants will come to the lab and will be given a 500 calorie meal-replacement drink to consume within 10 minutes. Immediately after finishing the meal they will complete the physical activity bout and then remain in a seated position until 2-hours has passed since ingesting the meal. After this time they may leave the lab. Resting and post-activity heart rate and blood pressure will be recorded.

Experimental trial D: Following an 8-10 hour overnight fast, participants will come to the lab and will be given a 500 calorie meal-replacement drink to consume within 10 minutes. Thirty minutes after finishing the meal they will complete the physical activity bout and then remain in a seated position until 2-hours has passed since ingesting the meal. After this time they may leave the lab. Resting and post-activity heart rate and blood pressure will be recorded.

After the final trial, the accelerometer and continuous glucose monitoring devices will be collected and the participant's role in the study will end.

Tipo de estudio

Intervencionista

Inscripción (Actual)

48

Fase

  • No aplica

Contactos y Ubicaciones

Esta sección proporciona los datos de contacto de quienes realizan el estudio e información sobre dónde se lleva a cabo este estudio.

Ubicaciones de estudio

  • Reino Unido
    • West Midlands
      • Edgbaston, West Midlands, Reino Unido, B15 2TT
        • University of Birmingham

Criterios de participación

Los investigadores buscan personas que se ajusten a una determinada descripción, denominada criterio de elegibilidad. Algunos ejemplos de estos criterios son el estado de salud general de una persona o tratamientos previos.

Criterio de elegibilidad

Edades elegibles para estudiar

18 años a 65 años (Adulto, Adulto Mayor)

Acepta Voluntarios Saludables

No

Géneros elegibles para el estudio

Todos

Descripción

Inclusion Criteria:

  • Age 18-65 years.
  • Body Mass Index 18-30 kg/m2.
  • Generally healthy.

Exclusion Criteria:

  • Smoking.
  • Pregnancy, or planning to become pregnant, or a nursing mother.
  • More than 2 kg weight change during the last month.
  • Diabetes.
  • Evidence of, or being treated for, cancer or infectious/non-infectious chronic hematological, pulmonary, cardiac, hepatic, renal, or gastrointestinal diseases.
  • Any contraindication to exercise

Plan de estudios

Esta sección proporciona detalles del plan de estudio, incluido cómo está diseñado el estudio y qué mide el estudio.

¿Cómo está diseñado el estudio?

Detalles de diseño

  • Propósito principal: Ciencia básica
  • Asignación: Aleatorizado
  • Modelo Intervencionista: Asignación cruzada
  • Enmascaramiento: Único

Armas e Intervenciones

Grupo de participantes/brazo
Intervención / Tratamiento
Comparador activo: Control
A liquid meal replacement shake containing 500 kcal (55% kcals from carb, 30% fat, 15% protein) will be administered at approx. 8 am following an 8-10 hour overnight fast. Postprandial blood glucose responses will be assessed for 2-hours post-ingestion. Two-hours after ingestion of the meal, participants will complete a bout of physical activity (either 30-mins of standing still, 30-mins of walking at a self-selected brisk pace on a treadmill, or 3-sets of circuit-exercises [10 squats, 10 push-ups, 10 lunges, 10 sit-ups]).
Conductual: Physical activity
Physical activity will consist of either 30-mins of standing still, 30-mins of walking at a self-selected brisk pace on a treadmill, or 3-sets of circuit-exercises (10 squats, 10 push-ups, 10 lunges, 10 sit-ups).
Suplemento dietético: Meal
Liquid meal replacement shake containing 500 kcal, with 55% kcals from carb, 30% from fat, and 15% from protein.
Experimental: Immediate prior to meal
At approx. 8 am following an 8-10 hour overnight fast, participants will complete a bout of physical activity (either 30-mins of standing still, 30-mins of walking at a self-selected brisk pace on a treadmill, or 3-sets of circuit-exercises [10 squats, 10 push-ups, 10 lunges, 10 sit-ups]). Immediately after completion of this bout, a liquid meal replacement shake containing 500 kcal will be administered. Postprandial blood glucose responses will be assessed for 2-hours post-ingestion.
Conductual: Physical activity
Physical activity will consist of either 30-mins of standing still, 30-mins of walking at a self-selected brisk pace on a treadmill, or 3-sets of circuit-exercises (10 squats, 10 push-ups, 10 lunges, 10 sit-ups).
Suplemento dietético: Meal
Liquid meal replacement shake containing 500 kcal, with 55% kcals from carb, 30% from fat, and 15% from protein.
Experimental: Immediate post-meal
A liquid meal replacement shake containing 500 kcal will be administered at approx. 8 am following an 8-10 hour overnight fast. Postprandial blood glucose responses will be assessed for 2-hours post-ingestion. Immediately after ingestion of the meal, participants will complete a bout of physical activity (either 30-mins of standing still, 30-mins of walking at a self-selected brisk pace on a treadmill, or 3-sets of circuit-exercises [10 squats, 10 push-ups, 10 lunges, 10 sit-ups]).
Conductual: Physical activity
Physical activity will consist of either 30-mins of standing still, 30-mins of walking at a self-selected brisk pace on a treadmill, or 3-sets of circuit-exercises (10 squats, 10 push-ups, 10 lunges, 10 sit-ups).
Suplemento dietético: Meal
Liquid meal replacement shake containing 500 kcal, with 55% kcals from carb, 30% from fat, and 15% from protein.
Experimental: 30-minutes post-meal
A liquid meal replacement shake containing 500 kcal will be administered at approx. 8 am following an 8-10 hour overnight fast. Postprandial blood glucose responses will be assessed for 2-hours post-ingestion. Thirty-minutes after ingestion of the meal, participants will complete a bout of physical activity (either 30-mins of standing still, 30-mins of walking at a self selected brisk pace on a treadmill, or 3-sets of circuit-exercises [10 squats, 10 push-ups, 10 lunges, 10 sit-ups]).
Conductual: Physical activity
Physical activity will consist of either 30-mins of standing still, 30-mins of walking at a self-selected brisk pace on a treadmill, or 3-sets of circuit-exercises (10 squats, 10 push-ups, 10 lunges, 10 sit-ups).
Suplemento dietético: Meal
Liquid meal replacement shake containing 500 kcal, with 55% kcals from carb, 30% from fat, and 15% from protein.

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Postprandial blood glucose concentrations.
Periodo de tiempo: In all trials, postprandial blood glucose concentrations will be measured - the change from baseline (immediately prior to meal ingestion) 2-hours after meal ingestion.
Continuous glucose monitoring (CGM; Dexcom G5 Mobile) will be used to measure the change in glucose levels from baseline.
In all trials, postprandial blood glucose concentrations will be measured - the change from baseline (immediately prior to meal ingestion) 2-hours after meal ingestion.

Medidas de resultado secundarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Postprandial blood glucose control (mean).
Periodo de tiempo: In all trials, postprandial glucose control will be measured between baseline (immediately prior to meal ingestion) and the end of the trial (2-hours after meal ingestion).
Mean glucose levels will be derived from CGM-measurements.
In all trials, postprandial glucose control will be measured between baseline (immediately prior to meal ingestion) and the end of the trial (2-hours after meal ingestion).
Postprandial blood glucose control (standard deviation).
Periodo de tiempo: In all trials, postprandial glucose control will be measured between baseline (immediately prior to meal ingestion) and the end of the trial (2-hours after meal ingestion).
The standard deviation of glucose levels will be derived from CGM-measurements.
In all trials, postprandial glucose control will be measured between baseline (immediately prior to meal ingestion) and the end of the trial (2-hours after meal ingestion).
Postprandial blood glucose control.
Periodo de tiempo: In all trials, postprandial glucose control will be measured between baseline (immediately prior to meal ingestion) and the end of the trial (2-hours after meal ingestion).
The mean amplitude of glycemic excursions will be derived from CGM-measurements.
In all trials, postprandial glucose control will be measured between baseline (immediately prior to meal ingestion) and the end of the trial (2-hours after meal ingestion).

Colaboradores e Investigadores

Aquí es donde encontrará personas y organizaciones involucradas en este estudio.

Patrocinador

University of Birmingham

Publicaciones y enlaces útiles

La persona responsable de ingresar información sobre el estudio proporciona voluntariamente estas publicaciones. Estos pueden ser sobre cualquier cosa relacionada con el estudio.

Publicaciones Generales

Fechas de registro del estudio

Estas fechas rastrean el progreso del registro del estudio y los envíos de resultados resumidos a ClinicalTrials.gov. Los registros del estudio y los resultados informados son revisados ​​por la Biblioteca Nacional de Medicina (NLM) para asegurarse de que cumplan con los estándares de control de calidad específicos antes de publicarlos en el sitio web público.

Fechas importantes del estudio

Inicio del estudio (Actual)

9 de octubre de 2017

Finalización primaria (Actual)

9 de noviembre de 2018

Finalización del estudio (Actual)

8 de diciembre de 2018

Fechas de registro del estudio

Enviado por primera vez

31 de octubre de 2018

Primero enviado que cumplió con los criterios de control de calidad

2 de noviembre de 2018

Publicado por primera vez (Actual)

5 de noviembre de 2018

Actualizaciones de registros de estudio

Última actualización publicada (Actual)

11 de diciembre de 2018

Última actualización enviada que cumplió con los criterios de control de calidad

10 de diciembre de 2018

Última verificación

1 de diciembre de 2018

Más información

Términos relacionados con este estudio

Palabras clave

Términos MeSH relevantes adicionales

Otros números de identificación del estudio

  • ERN_18-0942

Plan de datos de participantes individuales (IPD)

¿Planea compartir datos de participantes individuales (IPD)?

Indeciso

Información sobre medicamentos y dispositivos, documentos del estudio

Estudia un producto farmacéutico regulado por la FDA de EE. UU.

No

Estudia un producto de dispositivo regulado por la FDA de EE. UU.

No

Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .

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