Estimation of Metabolic Energy Expenditure during Short Walking Bouts
Estimation of Metabolic Energy Expenditure during Short Walking Bouts
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DOI：
10.1055/a-1373-5770
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发表时间：
2021-04-16
影响因子：
2.5
通讯作者：
Houdijk, Han
中科院分区：
文献类型：
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作者：
Blokland, Ilse Johanna;de Koning, Jos J.;Houdijk, Han
由于稳态的要求，间接量热法对代谢能量消耗的评估目前仅限于持续(>；4分钟)循环活动。这对于无法进行这种持续活动的患者群体来说是有问题的。因此，这项研究探索了一种基于短步行比赛中的氧耗(V.O(2))来估计代谢能量消耗的方法的有效性和可靠性。12名健康成人进行了6次跑台步行试验(分别以4和5 km/h步行1分钟、2分钟和6分钟)，同时测量V.O(2)。通过对步行和恢复时的净V.O(2)进行积分，计算总V.O(2)。用皮尔逊相关系数评估稳态V.O(2)的同时效度。重测信度通过组内相关系数(ICC)和Bland-Altman分析进行评估。总VO(2)与稳态VO(2)显著相关(r=0.91~0.99)，但持续较高。总的V.O(2)的重测信度(ICC=0.65~0.92)低于或接近稳态V.O(2)(ICC=0.83~0.92)，较短试验的信度较低。总的V.O(2)区分步态速度。总摄氧量为从耗氧量估算短活动的代谢负荷提供了一个有用的指标。尽管估计值不如稳态测量那么可靠，但它们可以洞察无法进行持续活动的患者群体对日常活动的未知代谢需求。
Assessment of metabolic energy expenditure from indirect calorimetry is currently limited to sustained (>4 min) cyclic activities, because of steady-state requirements. This is problematic for patient populations who are unable to perform such sustained activities. Therefore, this study explores validity and reliability of a method estimating metabolic energy expenditure based on oxygen consumption (V.O (2) ) during short walking bouts. Twelve able-bodied adults twice performed six treadmill walking trials (1, 2 and 6min at 4 and 5km/h), while V.O (2) was measured. Total V.O (2) was calculated by integrating net V.O (2) over walking and recovery. Concurrent validity with steady-state V.O (2) was assessed with Pearson's correlations. Test-retest reliability was assessed using intra-class correlation coefficients (ICC) and Bland-Altman analyses. Total V.O (2) was strongly correlated with steady-state V.O (2) (r=0.91-0.99), but consistently higher. Test-retest reliability of total V.O (2) (ICC=0.65-0.92) was lower than or comparable to steady-state V.O (2) (ICC=0.83-0.92), with lower reliability for shorter trials. Total V.O (2) discriminated between gait speeds. Total oxygen uptake provides a useful measure to estimate metabolic load of short activities from oxygen consumption. Although estimates are less reliable than steady-state measurements, they can provide insight in the yet unknown metabolic demands of daily activities for patient populations unable to perform sustained activities.