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Intensidad del Ejercicio y Efectos Postprandiales de Romper el Comportamiento Sedentario en Adultos con Sobrepeso

21 de septiembre de 2026 actualizado por: Muhammed Mustafa Atakan, Hacettepe University

Efectos Cardiometabólicos Postprandiales de Interrumpir el Comportamiento Sedentario con Ejercicio de Diferente Intensidad en Adultos Sanos con Sobrepeso

The purpose of this study is twofold: (1) to determine whether breaking up prolonged sitting with aerobic or sprint cycling breaks reduces postprandial blood glucose, insulin, CRP, and blood pressure, which are established risk markers for cardiometabolic diseases; and (2) to assess substrate oxidation during this period in order to identify which exercise condition promotes the greatest increase in fat oxidation.

Descripción general del estudio

Descripción detallada

Sedentary behavior (SED) refers to activities such as sitting, lying down, or reclining that require energy expenditure of ≤1.5 MET during the time spent awake. Prolonged and continuous sedentary behavior leads to adverse effects such as abnormal postprandial metabolic responses, insulin resistance, vascular dysfunction, high blood pressure, increased carbohydrate oxidation, and inflammation. Epidemiological data also show that SED increases the risk of mortality, cardiovascular disease, type 2 diabetes, and certain types of cancer. Experimental studies have shown that 2-5 minutes of low- or moderate-intensity aerobic exercise performed every 20-30 minutes during the postprandial period improves cardiometabolic health by reducing glucose, insulin, and blood pressure during the postprandial period. On the other hand, it is known that short-term sprint interval exercise (SIE) increases insulin sensitivity by rapidly depleting muscle glycogen, improves glucose control, lowers blood pressure, and increases fat oxidation. With these effects, SIE may be a time-efficient method for interrupting SED. Although the cardiometabolic benefits of SIE and aerobic exercise interruptions (AEI) are known, there is a lack of studies comparing the effects of interrupting SED with these two exercise types of different intensities in preventing postprandial cardiometabolic dysfunction. In this context, the aim of the study is to compare the postprandial cardiometabolic effects of interrupting sedentary behavior with AIE and sprint exercise interruptions (SEI) in overweight but otherwise healthy women and men aged 30-45. In this randomized crossover trial, volunteers will participate in three trials: 1) AEI, 2) SEI, and 3) SED. There will be a minimum 4-day washout period between trials. In the SEI and AEI trials, exercise interruptions will be implemented every 30 minutes during the 7-hour sitting period, whereas in the SED trial, participants will remain seated continuously for the entire duration. In all conditions, two meals (breakfast and lunch) will be served 3 hours apart, and the trials will begin, after the breakfast meal is consumed. Venous blood samples for every 30 minutes of the first two hours following meals to measure glucose and to be taken hourly during the rest experiment will be used to analyze insulin, glucose, and C-reactive protein (CRP) levels. In addition, blood pressure will be measured hourly, and fat oxidation will be assessed at the baseline, 2nd, 5th, and 7th hours. The effects of the conditions on glucose and insulin will be evaluated using linear mixed models. A Two-Way (Trial x Number of Repeats) Analysis of Variance for Repeated Measures will be used to detect differences between conditions.

Tipo de estudio

Intervencionista

Inscripción (Estimado)

18

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.

Estudio Contacto

  • Nombre: Hikmet Sercan Toprakoğlu
  • Número de teléfono: +905369792652
  • Correo electrónico: sercantprkgl@gmail.com

Ubicaciones de estudio

    • Beytepe
      • Ankara, Beytepe, Turquía (Türkiye)
        • Reclutamiento
        • Hacettepe Sports Science Faculty, Hacettepe Beytepe Clinic
        • Contacto:
          • Şükran Nazan Koşar, Professor
          • Número de teléfono: 0538 861 29 24
          • Correo electrónico: nazankosar@gmail.com
        • Investigador principal:
          • Hikmet Sercan Toprakoğlu
        • Sub-Investigador:
          • Seda Hanife Oğuz Baykal, Associate Professor
        • Sub-Investigador:
          • Muhammed Mustafa Atakan, Associate Professor
        • Sub-Investigador:
          • Yasemin Güzel, Doctoral faculty member
        • Sub-Investigador:
          • Yiğitcan Karanfil, Doctoral faculty member
        • Sub-Investigador:
          • İbrahim Türkel, Doctoral faculty member
        • Sub-Investigador:
          • Şükran Nazan Koşar, Professor

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

30 años a 45 años (Adulto)

Acepta Voluntarios Saludables

Sí

Géneros elegibles para el estudio

Todos

Descripción

Inclusion Criteria

  • Being physically inactive (not doing at least 150 minutes/week of structured exercise).
  • Being sedentary (having a daily sedentary time/day for >7 hours).
  • Having a BMI between 25 and 29.9 kg/m2.
  • Having a history of regular menstrual cycles for female participants.
  • Having medical examination approval.

Exclusion Criteria

  • Taking any acute or chronic medication or supplement that may affect metabolism.
  • Having an acute or chronic illness that limits exercise (musculoskeletal problems, cardiovascular disorders, respiratory problems, etc.).
  • Consuming tobacco products.
  • Meeting 3 or more of the metabolic syndrome criteria (waist circumference of 102 cm or more in men, 88 cm or more in women, triglyceride level of 150 mg/dL or higher, HDL cholesterol level below 40 mg/dL in men and 50 mg/dL in women, blood pressure of 130/85 mmHg or higher, fasting blood glucose level of 100 mg/dL (5.6 mg/L) or higher).

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: Prevención
  • Asignación: Aleatorizado
  • Modelo Intervencionista: Asignación cruzada
  • Enmascaramiento: Ninguno (etiqueta abierta)

Armas e Intervenciones

Grupo de participantes/brazo
Intervención / Tratamiento
Experimental: Sedentary: Participants will remain seated for 7 h.

The sedentary condition will take place in a seated position. During the seated condition, volunteers will be seated at a typical desk chair at an appropriate height with hip and knee angles of ~90° and feet flat on the floor. The seating area will include a standard desk chair, a work desk, and the volunteers' personal laptops. Volunteers will be instructed prior to the visit to avoid behaviors such as fidgeting, excessive leg movements, and crossing their legs to minimize potential extraneous effects.

Participants will remain seated for a total duration of 7 hours. During this period, they will be instructed to minimize excessive movement and will only be permitted to rise from the chair for voiding purposes.

Experimental: Breaking up sitting with aerobic exercise interruptions

The protocol that will interrupt sitting with AEI will involve cycle exercises performed at 50% of Wattmax for 2 minutes. The W and rpm levels corresponding to 50% of Wattmax will be determined using the values recorded during the determination of Wattmax.

In the aerobic exercise condition, participants will perform 2 minutes of moderate-intensity (%50 Wattmax) continuous cycling.

Experimental: Breaking up sitting with sprint exercise interruptions

The protocol that will interrupt sitting with SEI will involve cycle exercises performed at the maximum revolutions per minute achievable within 10 seconds. Immediately (2-3 seconds) before each SEI, volunteers will increase their pedal cadence to the maximum speed they can achieve, after which a pedal load will be applied to the bicycle ergometer and a sprint will be performed against the applied load for 10 seconds. During each sprint, the pedal load will be applied at %200 Wattmax level.

In the sprint condition, participants will complete a 10-second sprint at %200 Wattmax level, as determined during the preliminary test.

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Insulin
Periodo de tiempo: 7 hour for each experimental condition

Postprandial insulin. Net incremental area under the curve and total area under the curve for each 7 h condition will be calculated for insulin.

7 hour for each experimental condition

Medidas de resultado secundarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Glucose
Periodo de tiempo: 7 hour for each experimental condition

Postprandial glucose. Net incremental area under the curve and total area under the curve for each 7 hour condition will be calculated for glucose.

7 hour for each experimental condition
CRP
Periodo de tiempo: 7 hour

Postprandial CRP. Net incremental area under the curve and total area under the curve for each 7 h condition will be calculated for CRP.

7 hour
Substrate oxidation
Periodo de tiempo: 0, 2th, 5th, 7th hours

Postprandial substrate oxidation. During each experimental visit, for 7 hours, volunteers' respiratory data will be collected using a direct calorimeter with canopy hood in lying position for 10 minutes at 0, 2th, 5th, and 7th hours. The volunteers' resting fat and carbohydrate oxidations will be determined from the obtained data.

0, 2th, 5th, 7th hours
Blood pressure
Periodo de tiempo: 7 hour

Postprandial arterial blood pressure will be measured hourly for 7 h using an automatic blood pressure monitor with a cuff of appropriate size. The systolic and diastolic BP values measured will be recorded, and the mean arterial pressure will be calculated.

7 hour

Colaboradores e Investigadores

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

Patrocinador

Investigadores

  • Investigador principal: Şükran Nazan Koşar, Professor, Hacettepe University

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)

1 de septiembre de 2026

Finalización primaria (Estimado)

20 de noviembre de 2026

Finalización del estudio (Estimado)

15 de diciembre de 2026

Fechas de registro del estudio

Enviado por primera vez

24 de septiembre de 2025

Primero enviado que cumplió con los criterios de control de calidad

13 de noviembre de 2025

Publicado por primera vez (Actual)

17 de noviembre de 2025

Actualizaciones de registros de estudio

Última actualización publicada (Actual)

24 de septiembre de 2026

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

21 de septiembre de 2026

Última verificación

1 de agosto de 2026

Más información

Términos relacionados con este estudio

Plan de datos de participantes individuales (IPD)

¿Planea compartir datos de participantes individuales (IPD)?

NO

Descripción del plan IPD

We do not plan to share IPD with other researchers due to privacy concerns and ethical restrictions outlined in the study's informed consent procedure.

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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