Effects of CrossFit Training on the Immune System

This interventional study aims to investigate the effects of both acute and eight-week CrossFit training on immune system responses in sedentary adults. Participants will undergo an acute CrossFit exercise session, followed by an eight-week supervised CrossFit training program. Blood samples will be collected before and after the acute exercise session and again following the eight-week intervention to evaluate changes in selected immune system biomarkers. The primary objective is to determine whether acute and chronic CrossFit training induces significant alterations in immune function in previously sedentary individuals. The findings are expected to contribute to a better understanding of the immunological adaptations associated with high-intensity functional training and to provide evidence regarding the safety and potential health benefits of CrossFit exercise in sedentary populations.

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