LIPID METABOLISM IN YOUNG MEN AFTER A SINGLE SESSION OF CIRCUIT-RESISTANCE ExERCISE

Resistance exercise is a popular form of physical activity recommended to improve muscular strength and endurance, fat-free mass and bone mineral density. In our study, we investigated the effects of single bouts of whole body circuit-resistance exercise on a blood lipid profile (concentration of triacylglycerol – TG, total cholesterol – TC, high-density lipoprotein derived cholesterol – h DL-C), glucose level as well as fat oxidation rate (FOR) and a resting metabolic rate – RMR. Eight normolipidemic recreationally trained men (22.4 ± 2.1 year old, body mass 80.6 ± 8.7 kg, body fat 13.9 ± 3.4%, VO2 max 52.9 ± 3.3 ml/kg/min) volunteered to participate in the study. Mean RMR amounted to 6.65 ± 0.48 kJ/min. at rest and did not markedly change at 24 h after exercise cessation. The baseline FOR reached a mean value 0.14 ± 0.02 g/min. During postexercise recovery FOR remained unchanged, however serum TG level decreased 24 h after finishing a workout, compared with the resting value. Those changes were accompanied by no significant change in serum glucose concentration and cholesterol status. Conclusion: a single session of circuit resistance exercise is not sufficient to increase lipid oxidation during post-exercise recovery, however it results in a favourable decrease in serum TG level.