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Taylor, HL, Garabello, G, Pugh, JN, Morton, JP, Langan-Evans, C, Louis, J, Borgersen, R and Areta, JL (2022) Patterns of energy availability of free-living athletes display day-to-day variability that is not reflected in laboratory-based protocols: Insights from elite male road cyclists. Journal of Sports Sciences. ISSN 1466-447X
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Patterns of energy availability of free living athletes display day to day variability that is not reflected in laboratory based protocols Insights.pdf - Published Version Available under License Creative Commons Attribution Non-commercial No Derivatives. Download (1MB) | Preview |
Abstract
The physiological effects of low energy availability (EA) have been studied using a homogenous daily EA pattern in laboratory settings. However, whether this daily EA pattern represents those of free-living athletes and is therefore ecologically valid is unknown. To investigate this, we assessed daily exercise energy expenditure, energy intake and EA in 10 free-living elite male road cyclists (20 min Mean Maximal Power: 5.27 ± 0.25 W · kg−1) during 7 consecutive days of late pre-season training. Energy intake was measured using the remote-food photography method and exercise energy expenditure estimated from cycling crank-based power-metres. Seven-day mean ± SD energy intake and exercise energy expenditure was 57.9 ± 10.4 and 38.4 ± 8.6 kcal · kg FFM−1 · day−1, respectively. EA was 19.5 ± 9.1 kcal · kg FFM−1 · day−1. Within-participants correlation between daily energy intake and exercise energy expenditure was .62 (95% CI: .43 – .75; P < .001), and .60 (95% CI: .41 – .74; P < .001) between carbohydrate intake and exercise energy expenditure. However, energy intake only partially compensated for exercise energy expenditure, increasing 210 kcal · day−1 per 1000 kcal · day−1 increase in expenditure. EA patterns displayed marked day-to-day fluctuation (range: −22 to 76 kcal · kg FFM−1 · day−1). The validity of research using homogenous low EA patterns therefore requires further investigation.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Sport Sciences; 1106 Human Movement and Sports Sciences; 1302 Curriculum and Pedagogy |
| Subjects: | R Medicine > RC Internal medicine > RC1200 Sports Medicine |
| Divisions: | Sport & Exercise Sciences |
| Publisher: | Taylor & Francis |
| SWORD Depositor: | A Symplectic |
| Date Deposited: | 06 Sep 2022 13:42 |
| Last Modified: | 06 Sep 2022 13:45 |
| DOI or ID number: | 10.1080/02640414.2022.2115676 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/17516 |
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