Exercise and Health Laboratory, Faculty of Human Kinetics, Technical University of Lisbon, Portugal.
J Strength Cond Res. 2013 Jul;27(7):1920-7. doi: 10.1519/JSC.0b013e31827361eb.
An accurate assessment of total energy expenditure (TEE) during a competitive season is required. We aimed to validate TEE estimated by self-reported energy intake (EI) and the dietary reference intake (DRI) method in 19 elite basketball players (aged 16-18 years) using doubly labeled water (DLW) as the reference method. The DRI models and EI from dietary records over a 7-day period were simultaneously assessed for TEE estimation. Resting energy expenditure was assessed by indirect calorimetry. Fat and fat-free mass (FFM) were determined by a 4-compartment model (body volume by air displacement plethysmography, bone mineral by DXA, and water by deuterium dilution). Fat and FFM ranged from 4 to 19 kg and from 47 to 81 kg, respectively. The physical activity level ranged from 2.2 to 3.7 with a mean value of 2.8 ± 0.4. Total energy expenditure from DLW (17,598 ± 3,298 kJ·d) was significantly underestimated by EI (11,274 ± 2,567 kJ·d), whereas no differences were found using DRI (17,008 ± 3,206 kJ·d). The EI and DRI methods explained TEE from DLW by 34% (p = 0.057) and 44% (p = 0.002), respectively, and wide limits of agreement were observed. Our findings suggested that EI is not a valid tool for TEE assessment. The DRI method may be valid at a group level but inaccurate for estimating individual TEE in young players during a demanding competitive season period.
需要准确评估竞技赛季期间的总能量消耗 (TEE)。我们旨在使用双标水 (DLW) 作为参考方法，验证通过自我报告的能量摄入 (EI) 和膳食参考摄入量 (DRI) 方法估算的 19 名精英篮球运动员 (年龄 16-18 岁) 的 TEE。同时评估了 DRI 模型和 7 天膳食记录中的 EI 来估算 TEE。通过间接测热法评估静息能量消耗。通过体成分四室模型（空气置换体积描记法测定体容积、双能 X 射线吸收法测定骨矿物质、氘稀释法测定水）确定脂肪和去脂体重 (FFM)。脂肪和 FFM 范围分别为 4-19 公斤和 47-81 公斤。身体活动水平范围为 2.2-3.7，平均值为 2.8±0.4。通过 DLW 得出的总能量消耗（17598±3298kJ·d）明显低于 EI（11274±2567kJ·d），而使用 DRI 则没有差异（17008±3206kJ·d）。EI 和 DRI 方法分别解释了 DLW 得出的 TEE 的 34%（p=0.057）和 44%（p=0.002），且观察到广泛的一致性界限。我们的研究结果表明，EI 不是 TEE 评估的有效工具。DRI 方法可能在群体水平上有效，但在要求苛刻的竞技赛季期间，对估计年轻运动员的个体 TEE 不准确。
