Article

Combined Light Exercise after Meal Intake Suppresses Postprandial Serum Triglyceride.

1 Laboratory of Health Science, Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Kyoto, Japan 2 Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan.
Medicine and science in sports and exercise (Impact Factor: 4.48). 08/2012; DOI: 10.1249/MSS.0b013e31826f3107
Source: PubMed

ABSTRACT PURPOSE: The effect of exercise performed on the day of meal intake on postprandial triglyceride concentration, which is an independent risk factor for cardiovascular disease, is unclear. The present study investigated the effects of combined low-intensity exercise before and after a high-fat meal on serum triglyceride concentrations. METHODS: Ten healthy young subjects (4 men and 6 women) consumed a relatively high-fat diet (fat energy ratio: men 37.8%; women 39.1%). In the exercise trials, subjects performed brisk walking (2.0 km) following light resistance exercise, either 60 min before or after meal intake. Blood samples were collected prior to, and 2, 4, and 6 h after meal intake. RESULTS: Exercise resulted in a reduction in the transient elevation in serum triglyceride concentration observed 2 h following meal intake in the post-meal trial (131 ± 67 mg/dL) when compared with the sedentary trial (172 ± 71 mg/dL; 95% CI = 7.2-79.4, d = -1.00). This was also observed in the pre-meal trial, although the effect was less pronounced (148 ± 66 mg/dL; 95% CI = -9.0-59.0, d = -0.57). The triglyceride concentrations in the VLDL, LDL, and HDL fractions, but not the chylomicron fraction, were also decreased 2 h after meal intake in both exercise trials, while the integrated triglyceride values following meal intake showed a greater decrease when exercise was performed after meal intake (d = -1.23) than before (d = -0.47). The concentration of serum growth hormone was drastically increased after exercise in both trials. CONCLUSION: Low-intensity exercise on the day of meal intake, particular after intake, can prevent the elevation of postprandial triglyceride concentration in healthy young subjects.

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