Physical exercise and reduction of Postprandial Lipemia: the influence of caloric expenditure

Abstract

INTRODUCTION: Although the reductive effect of a single physical exercise (PE) session on postprandial lipemia (PPL) is controversial, studies indicate that caloric expenditure is the main determinant of PPL reduction. OBJECTIVE: Test the hypothesis that a PE session based on caloric expenditure modifies PPL. METHODS: This is a prospective controlled intervention study, including a cohort of 18 men with average age of 22 ± 1.3 years and BMI of 21 ± 4.2 kg/m². All were irregularly active students, with fasting triglyceride (TG) values of less than or equal to 150mg/dL. They were submitted to two PPL tests: Basal (PPLB) and Exercise (PPLE). Blood samples were collected at time 0 (fasting) and after ingestion of a lipid compound (25g) at 180 and 240 minutes for TG dosing. In the PPLE test, a PE session on treadmill was applied shortly after the collection at 120 minutes, achieving an energy expenditure of 500kcal. STATISTICS: The medians of the variation (delta) between the TG values between fasting and 120min (Δ1), fasting and 240min (Δ2) and between 120 and 240min (Δ3) were compared. The bi-directional Wilcoxon test was used to compare deltas. RESULTS: The TG medians of Δ1 respectively for PPLB and PPLE were 63 Vs.60 (p=0.95); Δ2 102 Vs. 25 (p=0.02) and Δ3 32 Vs. -10 (p<0.01). CONCLUSION: In this study, a physical exercise session based on caloric expenditure of 500kcal, after lipid intake, reduced the PPL peak in healthy youngsters.

Effects of Physical Exercise on Lipid and Inflammatory Profile of Women Using Combined Oral Contraceptive: A Cross-Over Study

“…In two studies carried out by our research group, different results (without modification and with reduction of the PPL) due to the modification of the exercise protocol were observed. 15,16 Another important point to be discussed to explain the results of the present study is the caloric expenditure between exercise sessions. According to Kim et al, 28 for changes in the lipid profile to occur, it is necessary not only to implement physical exercise sessions, but also to increase caloric expenditure between exercise sessions.…”

“…13 However, in our previous studies, there were no clinical trials that verified the cause-effect relationship of physical exercise in the population of women using COC. 11,12,[14][15][16] Thus, the present study aimed to test the hypothesis that high intensity interval physical exercise promotes changes in the lipid and inflammatory profile of young normolipid women who are irregularly active and using COCs.…”

“…This study identified that physically active women had a fasting lipid profile, PPL, and CRP that were less than irregularly active women. 16 The explanation for these findings may be based on the fact that these women, in addition to exercising regularly, also had an active life, that is, they In addition, people who frequently engage in physical exercise programs usually take greater care with eating habits. The present study did not encourage changes in the participants' lifestyles (higher levels of physical activity between sessions and changes in diet).…”