Circulating irisin and its connection with indices of body composition in aerobic and anaerobic endurance professional athletes: a case-control study

Author:

Ahmad Mousa NumanORCID,Abu Al Haija Dalia Mohammad

Abstract

Purpose. Irisin is released in response to exercise, but the regulatory effect of exercise on serum irisin is controversial. Evidence linking irisin with muscle mass or fat mass is limited. Little is known about the connection of irisin with the type and intensity of exercise in athletes. This study sought to determine serum irisin concentration (SIC) in professional athletes and non-athletes and assess its association with anthropometric indices, including body weight (BW), body mass index (BMI), waist-to-height ratio (WHtR), mid-upper arm circumference (MUAC), lean body mass (LBM), and fat mass (FM). Material and methods. We conducted a case-control study on 72 athletes and non-athletes comprising three age-and sex-matched groups with a 1:1 sex ratio: 24 footballers (aerobic endurance exercise), 24 bodybuilders (anaerobic strength exercise), and 24 nonexercised controls. Standard protocols for measuring anthropometric indices and quantifying SIC were followed. Results. Whole athletes had higher SIC than controls, with footballer men and women having higher values than bodybuilders and controls. Athletic men and women exhibited higher SIC than control men. SIC showed no sex differences within each experimental and control group. SIC negatively correlated with BW, BMI, LBM, MUAC, and WHtR in athlete women, BMI and MUAC in bodybuilders, FM in whole footballers, and BW in total control, but positively correlated with overall bodybuilders. Conclusions. The findings indicate that irisin is exercise-dependent, as it is enhanced in aerobic endurance more than in anaerobic strength exercise but is gender-independent. The results also support the relationship between irisin and body composition, as it clearly correlates negatively with BW, BMI, FM, and WHtR, suggesting a possible interplay between irisin and BW homeostasis for health maintenance.

Publisher

Independent publisher Zhanneta Kozina

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