The effects of prolonged standing compared to prolonged sitting on postprandial lipemia

Prolonged periods of sedentary behavior are linked to cardiometabolic disease independent of many risk factors including exercise and activity levels. This study examined the effects of posture, rather than activity by comparing one full day of sitting (14.45 ± 0.286 hours) compared to one full day of standing (12.22 ± 0.105 hours) on postprandial metabolism and lipemia. Eighteen subjects aged 23.72 ± 0.795 years completed two (sit/stand), four-day trials in a randomized crossover design. The first two days of the trial were control days where activity and diet were matched across trials. The third day involved one full day of sitting or standing. The fourth day was a high fat tolerance test, in which blood and gas samples were collected immediately before and for six hours after the ingestion of a high fat shake (1.34, 0.92, 0.17 g/kg body weight of fat, carbohydrate, and protein, respectively). Indirect calorimetry was used to measure metabolic rate and substrate oxidation while spectrophotometry was used to measure plasma concentration. Area under the curve (AUC) for the postprandial responses in plasma glucose and triglyceride were calculated with the trapezoidal rule. Prolonged standing resulted in significantly lower plasma triglyceride concentration (p=0.036) and an 11.3% decrease in total AUC (p=0.022) compared to sitting, but no change in incremental AUC (AUCi) was detected (p=0.186). There were no changes in substrate oxidation (p=0.522) or plasma glucose glucose concentration (p=0.776) during the high fat tolerance test. The study shows that posture does influence the lipid profile independent of exercise or activity by increasing the clearance of triglyceride from the blood stream without increasing the oxidation of fat

Author dc:creator

• Crawford, Charles K.

Contributors dc:contributor

• Coyle, Edward F., 1952-

• Postprandial lipemia
• Prolonged standing
• Sedentary behavior

Language dc:language

en

Identifier

http://dx.doi.org/10.26153/tsw/15506

OAI identifier oai:identifier

oai:tdl-ir.tdl.org:2152/88572