THE EFFECT OF 9-WEEKS STRENGTH TRAINING ON POSTPRANDIAL LIPEMIA

Abstract

PURPOSE The effect of 9-weeks strength training upon postprandial lipemia (PPL) was investigated in 19 healthy (VO2max 54.94 ± 2.09 ml kg min−1) males aged 22–28 yrs. METHODS Subjects were assigned to either a control (CON) or strength trained (ST) group (3 days/week). Before and after the training period; weight, fat free mass (FFM), muscle mass (MM), fat mass (FM), % body fat (%BF) and three-repetition maximum for bench press (3RM) were determined in each subject. Pre and post training PPL was determined using venous blood samples obtained in a 12-hr fasted state and after the consumption of a high fat breakfast (55 g fat, 149 g carbohydrate, 22 g protein). Blood samples were analyzed for plasma triglyceride (TG), total cholesterol (TC), and high-density lipoprotein cholesterol (HDL-C). Postprandial plasma TG was monitored hourly for 6 hours, from which the total area under the TG curve (TOTAUC) was calculated. Pre and post training between and within group difference were examined with analysis of variance. RESULTS No changes were noted in any variable tested in the CON group. The ST program resulted in significant increases (all P < 0.05) in weight (67.13 ± 3.11 vs 68.10 ± 3.06 kg), MM (55.10 ± 2.20 vs 56.40 ± 2.27 kg) and 3RM (58.06 ± 4.29 vs 72.28 ± 5.04 kg). There were no changes in %BF (13.13 ± 1.55 vs 12.47 ± 1.41 %), fasting TG (88.90 ± 18.13 vs 96.90 ± 18.94 mg.dl−1), TOTAUC (932.36 ± 284.25 vs 1034.88 ± 216.98 mg.dl−1 x6), fasting HDL-C (52.00 ± 4.26 vs 62.60 ± 6.58 mg.dl−1) or fasting TC (163.60 ± 8.03 vs 179.80 ± 9.14 mg.dl−1) with training. CONCLUSIONS These results indicate that 9-weeks of moderate ST does not improve fasting plasma lipoprotein profiles or the total postprandial lipid response, and therefore suggests that ST alone has little effect on reducing coronary heart disease risk.