Energy Balance over One Athletic Season

Medicine and Science in Sports and Exercise
Analiza M SilvaLuís B Sardinha

Abstract

Magnitude and variation in energy balance (EB) components over an athletic season are largely unknown. We investigated the longitudinal changes in EB over one season and explored the association between EB variation and change in the main fat-free mass (FFM) components in highly trained athletes. Eighty athletes (54 males; handball, volleyball, basketball, triathlete, and swimming) were evaluated from the beginning of the season to the main competition stage. Resting and total energy expenditure (REE and TEE, respectively) were assessed by indirect calorimetry and doubly labeled water, respectively. Physical activity energy expenditure was calculated as TEE - 0.1 TEE - REE. Fat mass (FM), FFM, and bone mineral were evaluated with dual-energy x-ray absorptiometry; changed body energy stores were calculated as 1.0(ΔFFM/Δtime) + 9.5(ΔFM/Δtime). Total-body water (TBW) and its compartments were assessed through dilution techniques, and total-body protein was calculated from a four-compartment model, with body volume assessed by air displacement plethysmography. Although a negative EB of -17.4 ± 72.7 kcal·d was observed (P < 0.05), EB varied widely among sports and across sex groups resulting in a net weight increase (0.7 ± 2.3 kg) t...Continue Reading

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Citations

Oct 4, 2018·Journal of Human Kinetics·Jacek Wilczyński
Dec 5, 2017·The Journal of Sports Medicine and Physical Fitness·Juliano H BorgesEzequiel M Gonçalves
Sep 17, 2019·European Journal of Sport Science·Analiza M SilvaLuís B Sardinha
Sep 21, 2018·Journal of Strength and Conditioning Research·Breyannah R ZandersChad M Kerksick
Jul 31, 2021·The British Journal of Nutrition·Grant M TinsleyMadelin R Siedler

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