Within-Day Energy Balance and Metabolic Suppression in Male Collegiate Soccer Players.

Sihyung Lee,Taewoong Oh,Kuniko Moto,Seungah Han,Motoko Taguchi

doi:10.3390/nu13082644

Abstract

Metabolic suppression due to relative energy deficiency can cause various physiological impairments in athletes. The purpose of this study was to evaluate within-day energy balance (WDEB) and the ratio between measured and predicted resting energy expenditure (REEratio) and to investigate the relationships between the markers of metabolic suppression. Ten male collegiate soccer players completed a 7-day food diary, physical activity, and heart rate records during the training and rest days. Energy intake (EI) and energy expenditure (EE) were analyzed to evaluate WDEB components. Body composition was measured using dual-energy X-ray absorptiometry (DXA), and blood sampling was conducted for hormonal analysis. The REE was measured using the Douglas bag method and predicted using the DXA-predicted method to calculate the REEratio. Participants were categorized into the normal (REEratio ≥ 0.94, n = 5) and suppressed (REEratio < 0.94, n = 5) groups. There were no group differences in the components of WDEB, except diet-induced thermogenesis (DIT), but EI was significantly higher in the normal group than in the suppressed group (7-day total: 3660 ± 347 vs. 3024 ± 491 kcal/day, p = 0.046 and rest days: 3772 ± 463 vs. 2796 ± 800 kcal/day, p = 0.046). Analysis of hormonal markers of metabolic suppression only showed a significant positive association between insulin-like growth factor-1 (IGF-1) and REEratio (r = 0.771, p = 0.009). The relationships between metabolic suppression and the markers of energy deficiency were inconclusive. There are possible associations of insufficient EI and IGF-1 levels with metabolic suppression, and further study is required to understand energy deficiency in male soccer players.

Highlights

Energy balance (EB) is important for maintaining appropriate body weight and preventing the negative effects of excessive and insufficient energy
The imbalanced energy status of athletes has been widely studied, and the concept of relative energy deficiency in sport (RED-S) suggested the effect of low energy availability (EA), which can result in altered health and performance in both male and female athletes [1]
0.90 ± 0.04, p = 0.002 and REEm /fat-free mass (FFM) 29.4 ± 1.0 vs. 25.7 ± 1.4 kcal/kg/day, p = 0.001), and total 7-day Energy intake (EI) and diet-induced thermogenesis (DIT) were significantly higher in the normal group than in the suppressed group

Summary

Introduction

Energy balance (EB) is important for maintaining appropriate body weight and preventing the negative effects of excessive and insufficient energy. Is often insufficient to achieve an appropriate energy status. The imbalanced energy status of athletes has been widely studied, and the concept of relative energy deficiency in sport (RED-S) suggested the effect of low energy availability (EA), which can result in altered health and performance in both male and female athletes [1]. Monitoring EA is important to prevent various physiological impairments, including endocrine, metabolic, and psychological problems [2], but assessing precise EA in free-living athletes is difficult because of limitations resulting from measurement errors and burden in athletes [3]. Recent studies have presented the concepts of within-day energy balance (WDEB) Monitoring EA is important to prevent various physiological impairments, including endocrine, metabolic, and psychological problems [2], but assessing precise EA in free-living athletes is difficult because of limitations resulting from measurement errors and burden in athletes [3]. 4.0/).

Objectives

Results

Discussion

Conclusion