Year: 2006
Type: article
Study design: Clinical Trial
Abstract: INTRODUCTION Among the multiple proposed mechanisms for the protective effect of regular physical activity against coronary heart disease is its favorable effect on blood lipids [4, 7]. Varied exercise interventions have con-sisted of efforts to quantify the exercise dose needed to change lipids and lipoproteins levels [4]. Cross-sectional studies have mostly demonstrated benefits of aerobic activities [4, 7]. The volume of physical activity, in which a relatively large muscle mass is employed, related to caloric expenditure seems to be the greatest stimulus for altering blood lipids and lipoprotein levels. Many investigators have reported relationships between blood lipid levels and the volume of running, swimming, cycling and recreational sports participation [3]. Several investigators have reported favorable changes in blood lipids and lipoproteins following a strength training intervention [6, 8]. The purpose of the study was to investigate the influence of an 8-week resistance training on the lipid profile of blood serum in young men. METHODS The study was performed on 10 healthy male students aged between 20-25 years (mean age of 23.8±1.76 years) with 1-6-year experience in strength training (mean 3.3±1.87 years). For one month before the study they had not performed resistance exercises. During the study the subjects participated in a 8-week resistance exercise training. Before the study (term I) and after 4 (term II), and 8 weeks (term III) of the training program the body content was measured and the blood for the analysis was drawn from the ulnar vein in the morning, in a fasting state. The body content was measured by way of bioimpedance analysis using the 101/S analyzer (Akern, Italy). The venous blood serum was used to determine concentrations of total cholesterol, HDL-cholesterol and triglycerides using the Cormay tests. The concentration of LDL-cholesterol was calculated using the Friedewald formula. The composition and energy intake of each subject’s three-day habitual diet were assessed before each term of the study. The nutrition mode assessment was based on the 24-hour dietary history by recall method [1]. Diet records were analyzed using the “Dietetyk 2003” software. The exercise training equipment used in this investigation was Olimp (Poland) resistance machines. During the eight weeks, the participants trained three times a week for 90 minutes. The subjects completed from three to four sets of 6-10 repetitions. In each set the load increased progressively from 60% to 80% of the maximal load, according to Weider progressive resistance program. The training involved all major muscle groups: muscles of the upper extremities (trape-zius, latissimus dorsi, pectoralis major, pectoralis minor, serratus anterior, rhomboideus, biceps brachii, triceps brachii), muscles of the trunk (rectus abdominis, transversus, external and internal oblique, quadratus lumborum) and muscles of the lower extremities (quadriceps femoris, iliopsoas, gluteus maximus, gluteus medius, adductor group, hamstring group, triceps surae).
Source: Wielkopolska Digital Library
Authors: Alicja Nowak, Łucja Pilaczyńska-Szczȩśniak, A. Wieczorek, Dominik Kaczmarek, Rafał Stemplewski
Language: English
Subfield: Physiology (medical)
Field: Medicine
Domain: Health Sciences
Open Access status: green
OpenAlex ID: W2144315540