Resistance Exercise and Postprandial Lipemia

Abstract

1490 Elevated levels of triacylglycerol in the postprandial state are considered a significant risk factor for the development of coronary artery disease (CAD). Different durations and intensities of endurance exercise have been shown to attenuate postprandial lipemia thus reducing risk for CAD. Resistance exercise has recently been shown to reduce postprandial lipemia, however, no dose response relationship between resistance training volume and the postprandial lipemia has been established. PURPOSE: To determine if a dose response effect exists for differing volumes of acute resistance exercise on the postprandial lipemic response after an oral fat tolerance test. METHODS: Subjects were healthy, resistance trained (>1 y), males (n = 3) and females (n = 6) between 18–30 y of age. Each subject participated in 4 different exercise trials: no exercise (control) and 1 set, 3 sets, and 5 sets of 8 exercises performed for 10 repetitions each at 75% of each subject's one-repetition maximum. On day 1, subjects either exercised or refrained from exercise (control). On day 2, after a 12 h overnight fast, subjects consumed an oral fat challenge consisting of 1.7 g fat, 1.65 g carbohydrate, 0.25 g protein, and equal to 99 kJ energy/kg fat free body mass. Blood collections occurred pre-meal, and at 0.5, 1, 2, 3, 4, 5, and 6 h post-meal. Samples were analyzed for triacylglycerol, glucose and insulin. Total area under the curve (AUC) was calculated for triacylglycerol, glucose and insulin during the postprandial period. RESULTS: There were no significant treatment comparisons found for the 3 differing volumes of resistance exercise for triacylglycerol, glucose or insulin. Mean AUC for triacylglycerol (mmol/l/6 h) were 7.461 (± 1.97), 6.672 (± 1.46), 7.088 (± 2.85) and 6.748 (± 2.33) for control, 1 set, 3 set and 5 set trials respectively. Mean AUC for insulin (pmol/l/6 h) were 41.497 (± 16.53), 62.325 (± 40.78), 44.806 (22.17 ±) and 45.508 (± 23.62) for control, 1 set, 3 set and 5 set trials respectively. CONCLUSION: There is no dose response relationship of acute resistance exercise when compared to control. The data also suggest there is no reduction in the postprandial lipemic response ∼13 h following an acute bout of resistance exercise when compared to control. Supported by the National Strength and Conditioning Association and the VCU-GCRC (MO1 RR00065 NIH).