Influence of Cardiorespiratory Fitness and Body Composition on Resting and Post-exercise Indices of Vascular Health in Young Adults

Overview

Journal Sports Med Health Sci

Specialty Orthopedics

Date 2024 Mar 11

PMID 38463670

Authors

Rian Q Landers-Ramos

Kathleen Dondero

Ian Imery

Nicholas Reveille

Hannah A Zabriskie

Devon A Dobrosielski

Affiliations

Soon will be listed here.

Abstract

Poor cardiorespiratory fitness may mediate vascular impairments at rest and following an acute bout of exercise in young healthy individuals. This study aimed to compare flow mediated dilation (FMD) and vascular augmentation index (AIx75) between young adults with low, moderate, and high levels of cardiorespiratory fitness before and after an acute bout of aerobic exercise. Forty-three participants (22 men; 21 women) between 18 and 29 years of age completed the study. Participants were classified into low, moderate, and high health-related cardiorespiratory fitness groups according to age- and sex-based relative maximal oxygen consumption (O max) percentile rankings. FMD was performed using Doppler ultrasound and AIx75 was performed using pulse wave analysis at baseline and 60-min after a 30-min bout of treadmill running at 70% O max. A significant interaction ( = 0.047; = 0.142) was observed, with the moderate fitness group exhibiting a higher FMD post-exercise compared with baseline ([6.7% ± 3.1%] vs. [8.5% ± 2.8%], = 0.028; = 0.598). We found a significant main effect of group for AIx75 ( = 0.023; = 0.168), with the high fitness group exhibiting lower AIx75 compared to low fitness group ([-10% ± 10%] vs. [2% ± 10%], respectively, = 0.019; = 1.07). This was eliminated after covarying for body fat percentage ( = 0.489). Our findings suggest that resting FMD and AIx75 responses are not significantly influenced by cardiorespiratory fitness, but FMD recovery responses to exercise may be enhanced in individuals with moderate cardiorespiratory fitness levels.

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