Alterations in inflammatory markers after a 12-week exercise program in individuals with schizophrenia-a randomized...

Area of Science:

• Psychiatry
• Exercise Physiology
• Immunology

Background:

• Inflammation is linked to poorer outcomes in schizophrenia, including depression and reduced quality of life.
• Physical exercise is known to reduce inflammation in general populations, but its effects in schizophrenia are understudied.
• Limited knowledge exists on exercise interventions and their impact on inflammatory markers in individuals with schizophrenia.

Purpose of the Study:

• To assess the impact of a 12-week exercise intervention on inflammatory markers in individuals with schizophrenia.
• To investigate whether physical exercise reduces levels of key inflammatory markers.
• To determine if baseline inflammation is associated with improvements in cardiorespiratory fitness (CRF) post-intervention.

Main Methods:

• Eighty-two individuals with schizophrenia were randomized into high-intensity interval training (HIIT) or active video gaming (AVG) groups for 12 weeks.
• Plasma samples were analyzed for inflammatory markers: soluble urokinase plasminogen activator receptor, c-reactive protein, tumor necrosis factor (TNF), soluble TNF receptor 1, and interleukin-6 (IL-6).
• Linear mixed-effects models and linear regression models were used to analyze changes in inflammatory markers and CRF.

Main Results:

• Tumor necrosis factor (TNF) and interleukin-6 (IL-6) levels increased in both HIIT and AVG groups during the intervention.
• No significant reduction was observed in other assessed inflammatory markers.
• Baseline IL-6 levels showed a positive association with improvements in CRF post-intervention for both groups.

Conclusions:

• A 12-week HIIT or AVG program did not reduce inflammatory markers in individuals with schizophrenia.
• Patients with elevated baseline IL-6 demonstrated enhanced CRF improvements.
• Larger studies with longer and more frequent exercise sessions are needed to clarify the relationship between exercise and inflammation in schizophrenia.