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Novel Approach to Assess Metabolic Flexibility in a Respiratory Chamber (METFLEX)

21 de agosto de 2021 actualizado por: David McDougal, Pennington Biomedical Research Center
The overarching aim of this study: To determine the effect of different meal compositions (high- vs. low-fat) on metabolic flexibility as it relates to meal-stimulated change in respiratory quotient (ΔRQ1) and sleep (ΔRQ2) metabolic flexibility, as well as the time course changes in respiratory quotient, RQ (i.e., peak RQ, time to peak RQ, nadir RQ, time to nadir, slope).

Descripción general del estudio

Estado

Terminado

Tipo de estudio

Intervencionista

Inscripción (Actual)

10

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

    • Louisiana
      • Baton Rouge, Louisiana, Estados Unidos, 70808-4124
        • Pennington Biomedical Research Center

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 40 años (Adulto)

Acepta Voluntarios Saludables

Géneros elegibles para el estudio

Todos

Descripción

Inclusion Criteria:

  • Eligibility criteria include:

    • Healthy male or female
    • Ages 18-40 y
    • BMI between 20 kg/m2 and 30 kg/m2 (±0.5 kg/m2 will be accepted)
    • Are willing to consume pre-prepared meals
    • Are willing to maintain current physical activity, sleep schedule, and dietary habits during the study.
    • Medically cleared for participation in the study by Medical Investigator

Exclusion Criteria:

  • Participants are ineligible to participate (or will be excluded from participating in this study) if they meet any of the following criteria:

    • Unstable weight in the last 3 months [gain or loss >7 lb (or 3.2 kg)]
    • Currently working shift work
    • Smoking or use of tobacco products within the last 3 months
    • Amenorrhea (or absence of regular monthly cycles)
    • History of clinically diagnosed diabetes or a fasting blood glucose >126 mg/dL
    • Average screening blood pressure >140/90 mmHg
    • Previous bariatric surgery (or other surgeries) for obesity or weight loss
    • Use of medications affecting metabolism or sleep
    • History of neurological disease
    • History of cardiovascular disease (or other chronic diseases)
    • Pregnant, planning to become pregnant, or breastfeeding
    • Adherence to special restrained diets (e.g., low-carbohydrate, low-fat, or vegetarian/vegan diets) over the last 3 months.

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: Doble

Armas e Intervenciones

Grupo de participantes/brazo
Intervención / Tratamiento
Experimental: High Fat Meal First
Arm 1 participants randomized to receive high fat meal first, and low fat meal second
60% fat meal
20% fat meal
Experimental: High Fat Meal Second
Arm 2 participants randomized to receive low fat meal first, and high fat meal second
60% fat meal
20% fat meal

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Overnight Respiratory Exchange Ratio
Periodo de tiempo: 12 hours

12-h mean of respiratory exchange ratio following each meal type.

measurement interval = 12h following start of meal (7pm)

The respiratory exchange ratio refers to the proportion of macronutrients being oxidized. A respiratory exchange ratio value of 1.0 indicates only carbohydrates are being oxidized, while a ratio value of 0.7 indicates only fats are being oxidized. Intermediate values, such as 0.85, indicates that both carbohydrate and fats are being oxidized.

12 hours

Medidas de resultado secundarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Sleep Respiratory Exchange Ratio
Periodo de tiempo: 3 h

mean of respiratory exchange ratio following each meal type during sleep period, 2am-5am., 2am-5am.

measurement interval = 3h (2am-5am)

The respiratory exchange ratio refers to the proportion of macronutrients being oxidized. A respiratory exchange ratio value of 1.0 indicates only carbohydrates are being oxidized, while a ratio value of 0.7 indicates only fats are being oxidized. Intermediate values, such as 0.85, indicates that both carbohydrate and fats are being oxidized.

3 h
Peak Increase in Respiratory Exchange Ratio
Periodo de tiempo: 4 h

mean of peak increase in respiratory exchange ratio (Peak values - baseline values) following each meal type

Peak values were defined as the peak respiratory exchange ratio value measured during the post-meal period, 6pm-10pm.

Baseline values were measured 1h prior to meal (5:00-5:45pm)

measurement interval of peak values= 4h (6pm-10pm)

A larger value in this measurement indicates that more carbohydrate than fats were being oxidized as fuel during the measurement period.

4 h
Peak Decrease in Respiratory Exchange Ratio
Periodo de tiempo: 12 h

mean of peak decrease in respiratory exchange ratio (baseline values -nadir values) following each meal type

Peak values were defined as the peak respiratory exchange ratio value measured during the post-meal period, 6pm-10pm.

Baseline values were measured 1h prior to meal (5:00-5:45pm)

measurement interval of nadir values= 12h (6pm-6am)

A larger value in this measurement indicates that more fats than carbohydrate were being oxidized as fuel during the measurement period.

12 h
Time to Peak Respiratory Exchange Ratio
Periodo de tiempo: 12 h

Average time from meal to peak respiratory exchange ratio value

This measurement indicates how long on average it took form the onset of the meal, 6pm, for the participants to achieve their highest/peak respiratory exchange ratio value.

12 h
Time to Nadir Respiratory Exchange Ratio
Periodo de tiempo: 12 h

Average time from meal to nadir respiratory exchange ratio value

This measurement indicates how long on average it took form the onset of the meal, 6pm, for the participants to achieve their lowest/nadir respiratory exchange ratio value.

12 h
Slope of Respiratory Exchange Ratio
Periodo de tiempo: 12 h

This value indicates the speed and magnitude of the participants change in respiratory exchange ratio between the peak and nadir values.

A more negative value in this measurement indicates either a short time interval between the highest and lowest respiratory exchange ratio values measured and/or a large difference between the highest and lowest values of respiratory exchange ratio values measured.

12 h

Colaboradores e Investigadores

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

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)

14 de enero de 2019

Finalización primaria (Actual)

31 de diciembre de 2019

Finalización del estudio (Actual)

31 de diciembre de 2020

Fechas de registro del estudio

Enviado por primera vez

11 de febrero de 2019

Primero enviado que cumplió con los criterios de control de calidad

11 de febrero de 2019

Publicado por primera vez (Actual)

15 de febrero de 2019

Actualizaciones de registros de estudio

Última actualización publicada (Actual)

17 de septiembre de 2021

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

21 de agosto de 2021

Última verificación

1 de agosto de 2021

Más información

Términos relacionados con este estudio

Otros números de identificación del estudio

  • PBRC 2018-029

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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