Effects of CrossFit Training on the Immune System (CFIT-IMMUNE)
From Acute Response to Chronic Adaptation: Immunological Effects of an Eight-Week CrossFit Training Program in Sedentary Adults
Descripción general del estudio
Estado
Condiciones
Intervención / Tratamiento
Descripción detallada
CrossFit is a high-intensity functional training (HIFT) program that combines aerobic exercise, resistance training, weightlifting, gymnastics, and metabolic conditioning within a single exercise session. Owing to its increasing popularity among both athletes and the general population, there is growing interest in understanding the physiological and immunological adaptations associated with CrossFit training. Although regular physical activity is known to enhance immune function and improve overall health, high-intensity exercise may induce transient alterations in immune responses, particularly in previously sedentary individuals.
The immune system plays a critical role in protecting the body against infections and maintaining physiological homeostasis. Acute bouts of strenuous exercise may temporarily modify immune cell function and inflammatory responses, whereas long-term exercise training may promote beneficial adaptations and improve immune regulation. However, the effects of CrossFit training on immune system biomarkers in sedentary adults remain insufficiently investigated.
The purpose of this interventional study is to evaluate the effects of both an acute CrossFit exercise session and an eight-week supervised CrossFit training program on immune system responses in sedentary adults. Participants will complete baseline assessments followed by an acute CrossFit exercise session. Subsequently, they will participate in an eight-week supervised CrossFit training program. Blood samples will be collected at predetermined time points before and after the acute exercise session and following completion of the eight-week intervention to assess changes in immune system biomarkers.
The primary objective is to determine whether acute and chronic CrossFit training produce significant changes in immune function in sedentary individuals. The results of this study are expected to improve understanding of the immunological responses to high-intensity functional training and provide evidence regarding the safety and potential health benefits of CrossFit exercise for previously sedentary adults.
Tipo de estudio
Inscripción (Actual)
Fase
- No aplica
Contactos y Ubicaciones
Ubicaciones de estudio
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Karabük Province
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Karabük, Karabük Province, Turquía (Türkiye)
- Exercise Physiology Laboratory, Faculty of Sport Sciences, Karabuk University
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Criterios de participación
Criterio de elegibilidad
Edades elegibles para estudiar
- Adulto
Acepta Voluntarios Saludables
Descripción
Inclusion Criteria:- Male participants aged 18 to 23 years
- Currently enrolled as a student at Yalova University
- Not regularly participating in exercise or sports training
- Medically eligible to participate in CrossFit training
- Willing and able to complete the eight-week CrossFit training program conducted three days per week
- Willing to provide venous blood samples at the specified assessment times
- Willing to provide written informed consent
Exclusion Criteria:- Regular participation in exercise or sports training
- History of a neurological disorder within the previous year
- History of an auditory, visual, or vestibular disorder within the previous year
- Serious upper- or lower-extremity injury within the previous six months
- Presence of a medical condition that could prevent safe participation in the exercise program
- Inability to complete the training or blood-sampling procedures
- Withdrawal of voluntary consent
Plan de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
- Propósito principal: Ciencia básica
- Asignación: N / A
- Modelo Intervencionista: Asignación de un solo grupo
- Enmascaramiento: Ninguno (etiqueta abierta)
Armas e Intervenciones
Grupo de participantes/brazo |
Intervención / Tratamiento |
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Experimental: CrossFit Training
Participants assigned to the CrossFit Training Group will participate in a structured CrossFit exercise program for 8 weeks.
Training sessions will be performed three times per week under the supervision of certified trainers.
Each session will include warm-up, functional strength exercises, high-intensity metabolic conditioning exercises, and cool-down periods.
Exercise intensity will be monitored throughout the intervention period.
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articipants in the experimental group will participate in an eight-week CrossFit training program performed three days per week (Monday, Wednesday, and Friday). Each training session will last approximately 60 minutes and will include a dynamic warm-up, strength training exercises, a Workout of the Day (WOD) section, and a cool-down period. The strength training component will include functional resistance exercises such as squats, deadlifts, and push presses, performed for 3-5 sets of 5-10 repetitions. Training intensity will progressively increase from approximately 60-70% of one-repetition maximum (1RM) during the first four weeks to 70-80% of 1RM during the final four weeks. The WOD component will include high-intensity functional exercises such as burpees, kettlebell swings, box jumps, rowing, sit-ups, pull-ups, and short-distance running. WOD sessions will be performed using AMRAP (As Many Rounds As Possible) and For Time formats with durations of approximately 10-20 minutes. P
Otros nombres:
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¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
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Mean Change in Total Leukocyte Count From Baseline to Completion of the Eight-Week CrossFit Program
Periodo de tiempo: Baseline and immediately after completion of the eight-week CrossFit training program
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Total leukocyte count will be determined from venous blood samples collected before the first training session and immediately after completion of the eight-week CrossFit training program.
For each participant, the change will be calculated as the post-program value minus the baseline value.
The group-level outcome will be summarized using the mean change and standard deviation.
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Baseline and immediately after completion of the eight-week CrossFit training program
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Mean Change in Absolute Monocyte Count From Baseline to Completion of the Eight-Week CrossFit Program
Periodo de tiempo: Baseline and immediately after completion of the eight-week CrossFit training program
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Absolute monocyte count will be determined from venous blood samples collected before the first training session and immediately after completion of the eight-week CrossFit training program.
For each participant, the change will be calculated as the post-program value minus the baseline value.
The group-level outcome will be summarized using the mean change and standard deviation.
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Baseline and immediately after completion of the eight-week CrossFit training program
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Mean Change in Absolute Lymphocyte Count From Baseline to Completion of the Eight-Week CrossFit Program
Periodo de tiempo: Baseline and immediately after completion of the eight-week CrossFit training program
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Absolute lymphocyte count will be determined from venous blood samples collected before the first training session and immediately after completion of the eight-week CrossFit training program.
For each participant, the change will be calculated as the post-program value minus the baseline value.
The group-level outcome will be summarized using the mean change and standard deviation.
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Baseline and immediately after completion of the eight-week CrossFit training program
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Mean Change in Absolute Neutrophil Count From Baseline to Completion of the Eight-Week CrossFit Program
Periodo de tiempo: Baseline and immediately after completion of the eight-week CrossFit training program
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Absolute neutrophil count will be determined from venous blood samples collected before the first training session and immediately after completion of the eight-week CrossFit training program.
For each participant, the change will be calculated as the post-program value minus the baseline value.
The group-level outcome will be summarized using the mean change and standard deviation.
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Baseline and immediately after completion of the eight-week CrossFit training program
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Colaboradores e Investigadores
Patrocinador
Fechas de registro del estudio
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Más información
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Palabras clave
Otros números de identificación del estudio
- KBU-FTB12-2026-002
Plan de datos de participantes individuales (IPD)
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Información sobre medicamentos y dispositivos, documentos del estudio
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