Effect of high-intensity intermittent exercise on postprandial plasma triacylglycerol in sedentary young women

• Published in: International journal of sport nutrition and exercise metabolism Vol. 24; no. 1; p. 110
• Main Authors: Tan, Martin, Chan Moy Fat, Rachel, Boutcher, Yati N, Boutcher, Stephen H
• Format: Journal Article
• Language: English
• Published: United States 01.02.2014
• Subjects: Adult; Bicycling - physiology; Dietary Fats - blood; Energy Intake; Exercise - physiology; Exercise Test; Fasting; Female; Humans; Oxygen Consumption; Physical Exertion - physiology; Postprandial Period; Rest - physiology; Running - physiology; Sedentary Lifestyle; Triglycerides - blood; Young Adult
• ISSN: 1543-2742
• DOI: 10.1123/ijsnem.2013-0094

High-intensity intermittent exercise (HIIE) such as the 30-s Wingate test attenuates postprandial triacylglycerol (TG), however, the ability of shorter versions of HIIE to reduce postprandial TG is undetermined. Thus, the effect of 8-s sprinting bouts of HIIE on blood TG levels of 12 females after consumption of a high-fat meal (HFM) was examined. Twelve young, sedentary women (BMI 25.1 ± 2.3 kg/m²; age 21.3 ± 2.1 years) completed a maximal oxygen uptake test and then on different days underwent either an exercise or a no-exercise postprandial TG condition. Both conditions involved consuming a HFM after a 12-hr fast. The HFM, in milkshake form provided 4170 kJ (993 Kcal) of energy and 98 g fat. Order was counter-balanced. In the exercise condition participants completed 20-min of HIIE cycling consisting of repeated bouts of 8 s sprint cycling (100-115 rpm) and 12 s of active rest (easy pedaling) 14 hr before consuming the HFM. Blood samples were collected hourly after the HFM for 4 hr. Total postprandial TG was 13% lower, p = .004, in the exercise (5.84 ± 1.08 mmol L⁻¹ 4 h⁻¹) compared with the no-exercise condition (6.71 ± 1.63 mmol L⁻¹ 4 h⁻¹). In conclusion, HIIE significantly attenuated postprandial TG in sedentary young women.