In:
Frontiers in Physiology, Frontiers Media SA, Vol. 13 ( 2022-4-19)
Abstract:
Purpose: Elite rowers have large body dimensions, a high metabolic capacity, and they realize high training loads. These factors suggest a high total energy requirement (TER), due to high exercise energy expenditure (EEE) and additional energetic needs. We aimed to study EEE and intensity related substrate utilization (SU) of elite rowers during rowing (EEE ROW ) and other (EEE NON-ROW ) training. Methods: We obtained indirect calorimetry data during incremental (N = 174) and ramp test (N = 42) ergometer rowing in 14 elite open-class male rowers (body mass 91.8 kg, 95% CI [87.7, 95.9]). Then we calculated EEE ROW and SU within a three-intensity-zone model. To estimate EEE NON-ROW , appropriate estimates of metabolic equivalents of task were applied. Based on these data, EEE, SU, and TER were approximated for prototypical high-volume, high-intensity, and tapering training weeks. Data are arithmetic mean and 95% confidence interval (95% CI). Results: EEE ROW for zone 1 to 3 ranged from 15.6 kcal·min −1 , 95% CI [14.8, 16.3] to 49.8 kcal·min −1 , 95% CI [48.1, 51.6], with carbohydrate utilization contributing from 46.4%, 95% CI [42.0, 50.8] to 100.0%, 95% CI [100.0, 100.0]. During a high-volume, a high-intensity, or a taper week, TER was estimated to 6,775 kcal·day −1 , 95% CI [6,651, 6,898], 5,772 kcal·day −1 , 95% CI [5,644, 5,900], or 4,626 kcal∙day −1 , 95% CI [4,481, 4,771], respectively. Conclusion: EEE in elite open-class male rowers is remarkably high already during zone 1 training and carbohydrates are dominantly utilized, indicating relatively high metabolic stress even during low intensity rowing training. In high-volume training weeks, TER is presumably at the upper end of the sustainable total energy expenditure. Periodized nutrition seems warranted for rowers to avoid low energy availability, which might negatively impact performance, training, and health.
Type of Medium:
Online Resource
ISSN:
1664-042X
DOI:
10.3389/fphys.2022.829757
DOI:
10.3389/fphys.2022.829757.s001
Language:
Unknown
Publisher:
Frontiers Media SA
Publication Date:
2022
detail.hit.zdb_id:
2564217-0
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