Association between the empirical dietary inflammatory index and cardiorespiratory fitness in Tehranian adults in 2017–2018

Abstract

BackgroundInflammatory-related chronic diseases are increasing in Iran with high consumption of a diet containing pro-inflammatory potential and a sedentary lifestyle. The empirical dietary inflammatory index (EDII) was developed as a tool to assess dietary effects on systemic inflammation. We examined the hypothesis that specific dietary patterns reflecting systemic inflammation are associated with cardiorespiratory fitness (CRF) in Tehranian adults.MethodsThis cross-sectional study was carried out on 270 adults who are residents of Tehran. Dietary intake was assessed using a 168-item valid and reliable food frequency questionnaire. The EDII score was developed according to participant dietary intakes of 21-item pre-defined food groups. CRF was assessed by using a graded exercise treadmill test. Anthropometric measurements were assessed using standard methods. To discover the association between CRF and EDII, we used multivariable logistic regression analysis.ResultsThose who were in the third tertile of the EDII had 57% lower odds of having better VO2Max (ml/kg/min) than those in the first tertile (OR: 0.43; 95% CI: 0.16, 1.12, p = 0.01). There were no significant differences between tertiles of the EDII score in terms of VO2 (L·min) and VO2 (LBM) before and after adjusting for confounders. There was a significant decrease in VO2Max (ml/kg/min) across tertiles of the EDII after controlling for covariates (p-value = 0.04). There was a significant inverse association between the EDII score and VO2Max (ml/kg/min) (β = −0.35, p = 0.001).ConclusionsOur finding demonstrated that a higher EDII might be associated with lower CRF in Tehranian adults. Prospective studies are needed to shed light on the causal link between the EDII and CRF.

The combined association of dietary inflammatory index and resting metabolic rate on cardiorespiratory fitness in adults

“…The highest quantity of oxygen that an individual may utilize when participating in intense or strenuous activity is known as VO2 max or maximal oxygen consumption. This measurement is generally considered the best indicator of cardiovascular fitness and aerobic endurance [ 37 ]. Payandeh et al [ 37 ] show that higher adherence to a higher pro-inflammatory potential diet may be associated with less VO 2Max (ml/kg/min).…”

“…This measurement is generally considered the best indicator of cardiovascular fitness and aerobic endurance [ 37 ]. Payandeh et al [ 37 ] show that higher adherence to a higher pro-inflammatory potential diet may be associated with less VO 2Max (ml/kg/min). In contrast, previous results from a case–control study by Scott et al showed the DII score was associated with systemic inflammation increase and less lung function.…”

Effect of combined oral contraceptive on cardiorespiratory function and immune activation in premenopausal women involved in exercise: A systematic review protocol

“…Again, an inverse correlation exist between biomarkers of inflammation and cardiorespiratory fitness in certain individuals exposed to exercise [32,33]. The extent to which gender differences and cyclical variations of sex hormones influence immunological responses during exercise is unclear [34][35][36].…”

Swimming Exercise-Induced Improvements in Cardiorespiratory Fitness (CRF) are Caused by Nitric Oxide Functional Adaptations in the Oxygen Transport System

“…One of the said modes recommends an increase in intensity and duration to improve overall fitness. The following measurement of CRF can provide professionals with valuable information on the motivation for periodically screening all youth patients' regular exercise programs [6]; it can be characterized as a program setting-response relationship. Increases in CRF are associated with a number of health benefits.…”