Difference in Caloric Expenditure in Sitting Versus Standing Desks

作者：Reiff Christopher^*; Marlatt Kara; Dengel Donald R

来源：Journal of Physical Activity and Health, 2012, 9(7): 1009-1011.

• oxygen consumption
• carbon dioxide production
• respiratory exchange ratio

Background: Traditional desks require students to sit; however, recently schools have provided students with nontraditional standing desks. The purpose of this study was to investigate differences in caloric expenditure of young adults while sitting at a standard classroom desk and standing at a nontraditional standing classroom desk. Methods: Twenty (10 male/10 female) young (22.8 +/- 1.9 y), healthy participants reported to the laboratory between the hours of 7:00 AM and 2:00 PM following a 12-h fast and 48-h break in exercise. Participants were randomly assigned to perform a series of mathematical problems either sitting at a normal classroom desk or standing at a nontraditional standing desk. Inspired and expired gases were collected for 45-min for the determination of oxygen consumption (VO2) carbon dioxide production (VCO2), and minute ventilation (V-E) using a metabolic gas system. Results: There were significant increases from sitting to standing in VO2 (0.22 +/- 0.05 vs. 0.28 +/- 0.05 L.min(-1), P <= .0001), VCO2, (0.18 +/- 0.05 vs. 0.24 +/- 0.050 L.min(-1), P <= .0001), V-E (7.72 +/- 0.67 vs. 9.41 +/- 1.20 L.min(-1), P <= .0001), and kilocalories expended per minute (1.36 +/- 0.20 kcal/min, P <= .0001 vs. 1.02 +/- 0.22 kcal/min, P <= .0001). Conclusions: Results indicate a significant increase in caloric expenditure in subjects that were standing at a standing classroom desk compared with sitting at a standard classroom desk.

• 出版日期2012-9