Exercise Physiology Research Laboratory, Department of Movement Sciences, University of Idaho, Moscow, ID.
Med Sci Sports Exerc. 2018 Aug;50(8):1710-1717. doi: 10.1249/MSS.0000000000001595.
This study aimed to investigate differences in energy expenditure (EE), heart rate (HR), productivity, fatigue, and pain while performing desk work while sitting (SIT), standing (STAND), and standing on a balance board (BOARD).
Thirty healthy adults (60% female, age = 39.7 ± 11.8 yr, body mass index = 26.7 ± 5.0 kg·m) employed in sedentary-based jobs volunteered for this randomized crossover trial. Participants performed typing work in three different positions: SIT, STAND, and BOARD, each condition lasting 30 min. Oxygen consumption (V˙O2) was measured via indirect calorimetry, and EE was calculated using respiratory quotient and corresponding caloric equivalent values. Productivity was quantified by measuring words typed per minute, accuracy, and typing mistakes. Overall feelings of fatigue and pain were self-reported three times during each position using validated 10-cm visual analog scales. Repeated-measures ANOVA was used to assess differences in outcome variables across conditions.
V˙O2 was significantly different among all conditions regardless of current standing desk use (SIT = 3.35 ± 0.53, STAND = 3.77 ± 0.48, BOARD = 3.92 ± 0.54 mL·kg·min, P < 0.001). EE (kcal·min) also differed (P < 0.001) among SIT (1.27 ± 0.22), STAND (1.42 ± 0.26), and BOARD (1.48 ± 0.29). Compared with sitting (67 ± 9 bpm), HR was higher in STAND (76 ± 11 bpm) and BOARD (76 ± 11 bpm, P < 0.001). Measures of productivity were not different across conditions (P > 0.05). Fatigue progressively increased over each 30-min condition, whereas pain in SIT and BOARD increased from minute 10 to minute 20 and then leveled off between minutes 20 and 30. For STAND, pain continued to increase over time.
Compared with sitting, a balance board may be effective for increasing EE without interfering with productivity in an occupational setting.
本研究旨在调查在坐姿（SIT）、站姿（STAND）和站在平衡板上（BOARD）三种不同的坐姿下进行办公时，能量消耗（EE）、心率（HR）、工作效率、疲劳感和疼痛感的差异。
30 名健康成年人（60%为女性，年龄=39.7±11.8 岁，体重指数=26.7±5.0kg·m-2）参与了这项随机交叉试验。参与者在三种不同的位置进行打字工作：SIT、STAND 和 BOARD，每种情况持续 30 分钟。通过间接热量测定法测量耗氧量（V˙O2），并使用呼吸商和相应的热量等效值计算 EE。通过测量每分钟输入的单词数、准确性和打字错误来量化工作效率。使用经过验证的 10 厘米视觉模拟量表，在每个位置三次自我报告整体疲劳感和疼痛感。使用重复测量方差分析评估不同条件下的结果变量差异。
无论当前是否使用站立式办公桌，所有条件下的 V˙O2 均存在显著差异（SIT=3.35±0.53、STAND=3.77±0.48、BOARD=3.92±0.54mL·kg·min-1，P＜0.001）。EE（kcal·min-1）也存在差异（P＜0.001），SIT（1.27±0.22）、STAND（1.42±0.26）和 BOARD（1.48±0.29）。与坐姿（67±9bpm）相比，STAND（76±11bpm）和 BOARD（76±11bpm）的 HR 更高（P＜0.001）。各项生产力测量指标在不同条件下没有差异（P＞0.05）。疲劳感在每个 30 分钟的条件下逐渐增加，而 SIT 和 BOARD 的疼痛感从第 10 分钟增加到第 20 分钟，然后在第 20 分钟到第 30 分钟之间趋于稳定。对于 STAND，疼痛感随着时间的推移持续增加。
与坐姿相比，平衡板可能是一种有效的增加 EE 的方法，而不会干扰职业环境中的生产力。
