Adaptaciones al Entrenamiento de Resistencia y Consumo de Cafeína
Estudio de Diferentes Estrategias de Suplementación con Cafeína sobre las Adaptaciones Inducidas por el Entrenamiento de Resistencia
Descripción general del estudio
Estado
Estado
Condiciones
Condiciones
Intervención / Tratamiento
Intervención / Tratamiento
Descripción detallada
Tipo de estudio
Tipo de estudio
Inscripción (Actual)
Inscripción
Fase
Fase
- No aplica
Contactos y Ubicaciones
Estudio Contacto
Estudio Contacto
- Nombre: Abdullah Demirli, PhD
- Número de teléfono: +90 545 259 22 25
- Correo electrónico: abdullah.demirli@iuc.edu.tr
Copia de seguridad de contactos de estudio
- Nombre: Kaan Kaya, PhD
- Número de teléfono: +90 546 876 0049
- Correo electrónico: kaan.kaya@yeniyuzyil.edu.tr
Ubicaciones de estudio
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Avcilar
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Istanbul, Avcilar, Turquía (Türkiye), 34010
- Istanbul University-Cerrahpasa, Faculty of Sport Sciences Performance Laboratory
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Criterios de participación
Criterio de elegibilidad
Criterio de elegibilidad
Edades elegibles para estudiar
- Adulto
Acepta Voluntarios Saludables
Descripción
Criterios de inclusión:
- Sexo masculino y edad entre 18-30 años
- Sin historial de consumo de cafeína o ingesta habitual muy baja (<50 mg/día)
- Sin participación en un programa de entrenamiento de resistencia regular en los últimos 6 meses
- Índice de masa corporal (IMC) entre 18,5-30 kg/m2
- Disposición para asistir a todas las sesiones de entrenamiento y pruebas de forma regular
- Provisión de consentimiento informado por escrito tras ser informado completamente sobre el estudio
Criterios de exclusión:
- Presencia de enfermedades cardiovasculares, metabólicas, renales, hepáticas u otras enfermedades crónicas graves
- Trastornos psiquiátricos diagnosticados o intolerancia/alergia grave a la cafeína
- Uso de medicamentos que afecten el metabolismo de la cafeína o el anabolismo muscular (por ejemplo, betabloqueantes, antidepresivos, esteroides anabólicos)
- Lesiones musculoesqueléticas que impidan el entrenamiento de resistencia de forma segura
- Consumo de tabaco o alcohol en niveles que puedan afectar los resultados del estudio
- Participación concurrente en otro estudio de intervención de ejercicio
- Incapacidad para tolerar los procedimientos de escaneo DXA, toma de muestras de sangre o ingesta de D2O
Plan de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
- Propósito principal: Ciencia básica
- Asignación: Aleatorizado
- Modelo Intervencionista: Asignación paralela
- Enmascaramiento: Triple
Número de brazos
Armas e Intervenciones
Grupo de participantes/brazoGrupo de participantes/brazo |
Intervención / TratamientoIntervención / Tratamiento |
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Experimental: Strategy 1: Constant Daily Dose
Participants receive caffeine at a constant daily dose of 4 mg/kg/day for 10 weeks.
Supervised resistance training is performed 3 times per week for 10 weeks.
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Oral caffeine capsule at 4 mg/kg body weight, consumed daily approximately 60 minutes before training sessions (on training days) or at the same time of day (on rest days).
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Experimental: Strategy 2: Escalating Dose
Participants receive caffeine at a gradually escalating dose, starting at 2 mg/kg/day in week 1 and increasing to 6 mg/kg/day by week 10 (1 mg/kg every 2 weeks).
Supervised resistance training is performed 3 times per week for 10 weeks.
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• Oral caffeine starting at 2 mg/kg/day and increasing incrementally to reach 6 mg/kg/day by week 10.
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Experimental: Strategy 3: Training Days Only
Participants receive caffeine at 4 mg/kg only on training days (3 times per week) for 10 weeks.
Supervised resistance training is performed 3 times per week for 10 weeks.
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Oral caffeine capsule at 4 mg/kg body weight, consumed only on training days approximately 60 minutes before exercise.
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Comparador de placebos: Placebo
Participants receive 250 mg/day cellulose for 10 weeks.
Supervised resistance training is performed 3 times per week for 10 weeks.
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Oral placebo capsule (250 mg cellulose), consumed daily approximately 60 minutes before training sessions (on training days) or at the same time of day (on rest days).
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¿Qué mide el estudio?
Medidas de resultado primarias
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
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Change in Lean Body Mass Measured by DXA
Periodo de tiempo: Baseline and post-test (after completing 10 weeks of interventions)
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Change in total lean body mass measured using dual-energy X-ray absorptiometry (DXA), reported in kilograms.
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Baseline and post-test (after completing 10 weeks of interventions)
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Change in Fat Mass Measured by DXA
Periodo de tiempo: Baseline and post-test (after completing 10 weeks of interventions)
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Change in fat mass measured using DXA.
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Baseline and post-test (after completing 10 weeks of interventions)
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Maximal Strength
Periodo de tiempo: Baseline, and post-test (after completing 10 weeks of interventions)
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Measure by one-repetition maximum (1-RM) on a lower body (Smith machine Back Squat) and two upper body (Bench Press machine and Lat Pulldown machine) exercises.
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Baseline, and post-test (after completing 10 weeks of interventions)
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Total Training Volume Load
Periodo de tiempo: During the intervention period (all training sessions).
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Total training volume load calculated as the sum of lifted load using the formula (kilograms × repetitions × sets) accumulated during each intervention period.
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During the intervention period (all training sessions).
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Change in Skeletal Muscle Thickness
Periodo de tiempo: Baseline and post-test (after completing 10 weeks of interventions)
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Change in skeletal muscle thickness measured using B-mode ultrasound, reported in mm.
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Baseline and post-test (after completing 10 weeks of interventions)
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Medidas de resultado secundarias
Medidas de resultado secundarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
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Muscular endurance
Periodo de tiempo: Baseline, and post-test (after completing 10 weeks of interventions)
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It will be measured by a repetitions-to-failure test on the Smith machine back squat using a load corresponding to 60% of the current 1RM.
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Baseline, and post-test (after completing 10 weeks of interventions)
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Neuromuscular function
Periodo de tiempo: Baseline and post-test (after completing 10 weeks of interventions)
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It will be measured by the countermovement jump (CMJ) test on a force platform.
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Baseline and post-test (after completing 10 weeks of interventions)
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Resting concentrations of testosterone
Periodo de tiempo: Baseline, and post-test (after completing 10 weeks of interventions)
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They will be measured using standard biochemical analyses.
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Baseline, and post-test (after completing 10 weeks of interventions)
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Plasma epinephrine responses to exercise
Periodo de tiempo: During the first training session of Week 1 and the final training session of Week 10, at three time points: (1) pre-supplementation, (2) immediately before exercise and (3) immediately after exercise.
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They will be measured using standard biochemical analyses.
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During the first training session of Week 1 and the final training session of Week 10, at three time points: (1) pre-supplementation, (2) immediately before exercise and (3) immediately after exercise.
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Recovery
Periodo de tiempo: Before each of the 30 training sessions during the study.
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It will be assessed using the validated 0-10 Perceived Recovery Status Scale (0 to 2: very poorly recovered, 3 to 4: poorly recovered, 5 to 6: adequately recovered, 7 to 8: well recovered, and 9 to 10: fully recovered).
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Before each of the 30 training sessions during the study.
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Adverse Events
Periodo de tiempo: From initiation of the 4-week caffeine abstinence period through completion of the post-intervention assessments, monitored throughout the study (approximately 16 weeks).
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Adverse events will be assessed using a standardized questionnaire administered throughout the study.
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From initiation of the 4-week caffeine abstinence period through completion of the post-intervention assessments, monitored throughout the study (approximately 16 weeks).
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Sleep quality
Periodo de tiempo: Baseline and post-test (after completing 10 weeks of interventions).
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It will be assessed by the Pittsburgh Sleep Quality Index (PSQI).
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Baseline and post-test (after completing 10 weeks of interventions).
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Rate of perceived exertion
Periodo de tiempo: After each supervised training session, participants were assessed throughout the 10-week intervention period (30 training sessions).
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Assessed using the Borg Category-Ratio (CR10) Scale, ranging from 0 ("nothing at all") to 10 ("maximal").
Participants will report their perceived exertion after each supervised training session.
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After each supervised training session, participants were assessed throughout the 10-week intervention period (30 training sessions).
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Resting concentrations of insulin-like growth factor-1 (IGF-1)
Periodo de tiempo: Baseline, and post-test (after completing 10 weeks of interventions)
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They will be measured using standard biochemical analyses.
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Baseline, and post-test (after completing 10 weeks of interventions)
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Resting concentrations of cortisol
Periodo de tiempo: Baseline, and post-test (after completing 10 weeks of interventions)
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They will be measured using standard biochemical analyses.
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Baseline, and post-test (after completing 10 weeks of interventions)
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Resting concentrations of creatine kinase
Periodo de tiempo: Baseline, and post-test (after completing 10 weeks of interventions)
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They will be measured using standard biochemical analyses.
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Baseline, and post-test (after completing 10 weeks of interventions)
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Serum cortisol responses to exercise
Periodo de tiempo: During the first training session of Week 1 and the final training session of Week 10, at three time points: (1) pre-supplementation, (2) immediately before exercise and (3) immediately after exercise.
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They will be measured using standard biochemical analyses.
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During the first training session of Week 1 and the final training session of Week 10, at three time points: (1) pre-supplementation, (2) immediately before exercise and (3) immediately after exercise.
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Plasma norepinephrine responses to exercise
Periodo de tiempo: During the first training session of Week 1 and the final training session of Week 10, at three time points: (1) pre-supplementation, (2) immediately before exercise and (3) immediately after exercise.
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They will be measured using standard biochemical analyses.
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During the first training session of Week 1 and the final training session of Week 10, at three time points: (1) pre-supplementation, (2) immediately before exercise and (3) immediately after exercise.
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Colaboradores e Investigadores
Patrocinador
Patrocinador
Colaboradores
Colaboradores
Publicaciones y enlaces útiles
Publicaciones Generales
- Guest NS, VanDusseldorp TA, Nelson MT, Grgic J, Schoenfeld BJ, Jenkins NDM, Arent SM, Antonio J, Stout JR, Trexler ET, Smith-Ryan AE, Goldstein ER, Kalman DS, Campbell BI. International society of sports nutrition position stand: caffeine and exercise performance. J Int Soc Sports Nutr. 2021 Jan 2;18(1):1. doi: 10.1186/s12970-020-00383-4.
- Lovallo WR, Whitsett TL, al'Absi M, Sung BH, Vincent AS, Wilson MF. Caffeine stimulation of cortisol secretion across the waking hours in relation to caffeine intake levels. Psychosom Med. 2005 Sep-Oct;67(5):734-9. doi: 10.1097/01.psy.0000181270.20036.06.
- Matsumura T, Takamura Y, Fukuzawa K, Nakagawa K, Nonoyama S, Tomoo K, Tsukamoto H, Shinohara Y, Iemitsu M, Nagano A, Isaka T, Hashimoto T. Ergogenic Effects of Very Low to Moderate Doses of Caffeine on Vertical Jump Performance. Int J Sport Nutr Exerc Metab. 2023 Jul 26;33(5):275-281. doi: 10.1123/ijsnem.2023-0061. Print 2023 Sep 1.
- Brook MS, Wilkinson DJ, Mitchell WK, Lund JN, Szewczyk NJ, Greenhaff PL, Smith K, Atherton PJ. Skeletal muscle hypertrophy adaptations predominate in the early stages of resistance exercise training, matching deuterium oxide-derived measures of muscle protein synthesis and mechanistic target of rapamycin complex 1 signaling. FASEB J. 2015 Nov;29(11):4485-96. doi: 10.1096/fj.15-273755. Epub 2015 Jul 13.
- Pickering C, Kiely J. Are low doses of caffeine as ergogenic as higher doses? A critical review highlighting the need for comparison with current best practice in caffeine research. Nutrition. 2019 Nov-Dec;67-68:110535. doi: 10.1016/j.nut.2019.06.016. Epub 2019 Jun 26.
- Grgic J, Trexler ET, Lazinica B, Pedisic Z. Effects of caffeine intake on muscle strength and power: a systematic review and meta-analysis. J Int Soc Sports Nutr. 2018 Mar 5;15:11. doi: 10.1186/s12970-018-0216-0. eCollection 2018.
- Grgic J, Grgic I, Pickering C, Schoenfeld BJ, Bishop DJ, Pedisic Z. Wake up and smell the coffee: caffeine supplementation and exercise performance-an umbrella review of 21 published meta-analyses. Br J Sports Med. 2020 Jun;54(11):681-688. doi: 10.1136/bjsports-2018-100278. Epub 2019 Mar 29.
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio (Actual)
Inicio del estudio
Finalización primaria (Actual)
Finalización primaria
Finalización del estudio (Actual)
Finalización del estudio
Fechas de registro del estudio
Enviado por primera vez
Enviado por primera vez
Primero enviado que cumplió con los criterios de control de calidad
Primero enviado que cumplió con los criterios de control de calidad
Publicado por primera vez (Actual)
Publicado por primera vez
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
Última actualización publicada
Última actualización enviada que cumplió con los criterios de control de calidad
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Última verificación
Más información
Términos relacionados con este estudio
Palabras clave
Términos MeSH relevantes adicionales
- Manifestaciones neurológicas
- Enfermedades del Sistema Nervioso
- Manifestaciones Neuromusculares
- Condiciones Patológicas, Anatómicas
- Atrofia
- Condiciones Patológicas, Signos y Síntomas
- Signos y síntomas
- Hipertrofia
- Atrofia Muscular
- Compuestos heterocíclicos
- Compuestos heterocíclicos, 2 anillos
- Compuestos heterocíclicos, anillo fusionado
- Alcaloides
- Purinones
- Purinas
- Xantino
- Cafeína
Otros números de identificación del estudio
Otros números de identificación del estudio
- 2026/01-1792
Plan de datos de participantes individuales (IPD)
¿Planea compartir datos de participantes individuales (IPD)?
Descripción del plan IPD
Marco de tiempo para compartir IPD
Criterios de acceso compartido de IPD
Tipo de información de apoyo para compartir IPD
- PROTOCOLO DE ESTUDIO
- SAVIA
- CÓDIGO_ANALÍTICO
Información sobre medicamentos y dispositivos, documentos del estudio
Estudia un producto farmacéutico regulado por la FDA de EE. UU.
Estudia un producto de dispositivo regulado por la FDA de EE. UU.
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