DIFFERENT PATTERNS OF WALKING AND POSTPRANDIAL TRIGLYCERIDES IN OLDER WOMEN.

Purpose: Although a single bout of continuous exercise (>=30 min) reduces postprandial triglyceride (TG), little evidence is available regarding the effect of multiple short (= 1.70 mmol/L) completed three, one-day laboratory-based trials in a random order: 1) control, 2) continuous walking, and 3) multiple short bouts of walking. On the control trial, participants sat in a chair for 8 hours. For the walking trials, participants walked briskly in either one 30-min bout in the morning (0900-0930) or twenty 90-sec bouts over 8 hours. Except for walking both exercise trials mimicked the control trial. In each trial, participants consumed a standardized breakfast (0800) and lunch (1100). Venous blood samples were collected in the fasted state and at 2, 4, 6 and 8 h after breakfast. Results: The serum TG incremental area under the curve was 35% and 33% lower on the continuous and multiple short bouts of walking trials than the control trial (8.2 +/- 3.1 vs 8.5 +/- 5.4 vs 12.7 +/- 5.8 mmol[BULLET OPERATOR]8h/L respectively, main effect of trial: ES = 0.459, P = 0.001). Conclusions: Accumulating walking in short bouts limits postprandial TG in at-risk, inactive older women with fasting hypertriglyceridemia. (C) 2017 American College of Sports Medicine

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