In the workplace, sit-stand workstations are being installed to reduce excessive sitting time and the consequent risk factors for cardiovascular ailments (e.g., postprandial hyperglycemia). However, a prolonged standing posture also has detrimental effects in terms of musculoskeletal symptoms and work efficiency. We thus investigated whether alternating between a sitting and standing work posture improves postprandial glucose response and computer task performance. Nine healthy young males completed 4 × 20-min computer tasks in the early afternoon (i.e., 30 min after eating lunch) under three different work conditions, had no change in posture (only sitting=the control trial, CON), and engaged in two styles of alternating between sitting and standing every 20 min (sitting → standing → sitting → standing, SIT-STAND; standing → sitting → standing → sitting, STAND-SIT). For the computer tasks, all participants had to subtract a two-digit number from a four-digit number and to input the answer in the answer column on the computer. Task performance was evaluated as the number of achievements and accuracy rate every 20 min. Blood glucose concentration was assessed before, immediately after, 30 min, 52 min, 74 min, 96 min, and 118 min after eating lunch. The number of achievements and accuracy rate did not differ among the three trials. The total area under the curve (AUC) for blood glucose concentration was significantly lower in the SIT-STAND and STAND-SIT trials compared with CON, whereas no significant difference was observed between the SIT-STAND and STAND-SIT trials. In conclusion, alternating between a sitting and standing work posture attenuated postprandial blood glucose accumulation without reducing task performance, irrespective of the order of changes in work posture.

在工作场所，正在安装坐站工作台以减少过长的久坐时间和随之而来的心血管疾病风险因素（例如，餐后高血糖症）。然而，长时间的站立姿势也会对肌肉骨骼症状和工作效率产生不利影响。因此，我们调查了坐姿和站姿之间的交替是否可以改善餐后葡萄糖反应和计算机任务性能。九名健康年轻男性在三种不同的工作条件下，在下午早些时候（即午餐后 30 分钟）完成了 4 × 20 分钟的计算机任务，姿势没有变化（仅坐着=对照试验，CON），并从事每 20 分钟有两种坐站交替方式（坐→站→坐→站，SIT-STAND；站→坐→站→坐，站-坐）。对于计算机任务，所有参与者必须从四位数中减去两位数，并在计算机的答案栏中输入答案。任务绩效评估为每 20 分钟的成就数量和准确率。在吃午饭之前、之后、30 分钟、52 分钟、74 分钟、96 分钟和 118 分钟后评估血糖浓度。三项试验的成就数量和准确率没有差异。与 CON 相比，SIT-STAND 和 STAND-SIT 试验中血糖浓度的总曲线下面积 (AUC) 显着降低，而 SIT-STAND 和 STAND-SIT 试验之间未观察到显着差异。综上所述，