Why the study?
The endocannabinoid system appears altered in depression, and cardiorespiratory fitness may interact in the relationship between endocannabinoid biomarkers and depressive symptoms.
Does cardiorespiratory fitness modify the association between endocannabinoid system biomarkers and depressive symptoms in adults with depression?
Does cardiorespiratory fitness modify the association between endocannabinoid system biomarkers and depressive symptoms in adults with depression?
Higher cardiorespiratory fitness may have a protective role against depressive symptoms by modulating the endocannabinoid system, specifically through increases in 2-AG.
Answers are grounded in this paper and cite their sources.
High CRF linked to inverse depressive-2-AG association; hypothesis-generating for CRF modulation of endocannabinoids in depression.
Objective: Endocannabinoid system (ES) seems to be altered in patients with depression. Cardiorespiratory fitness (CRF) may be an interacting factor in the relationship between ES biomarkers and depressive symptoms in people diagnosed with depression. The aim was to study the role of CRF on the possible association between ES biomarkers and depressive symptoms in 73 adults diagnosed with depression. Method: This study examine the outcomes of cardiorespiratory fitness and plasma levels of the lipid mediators; anandamide (AEA) and 2-arachidonoylglycerol (2-AG) sampled from 73 adults diagnosed with depression. Results: Patients with high CRF level had significant and inverse association among depressive symptoms and 2-AG serum levels (β: -0.013; 95% CI: -0.262 to -0.000; R²=22.6; P<0.001). Conclusions: Higher CRF levels could have a protective role on depressive symptoms by increases in 2-AG.
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Muñoz et al. (2022) studied this question.
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