| Autor: |
Maciejewska D; Department of Biochemistry and Human Nutrition, Pomeranian Medical University, Szczecin, Poland., Michalczyk M; Department of Sports Nutrition, Academy of Physical Education in Katowice, Katowice, Poland., Czerwińska-Rogowska M; Department of Biochemistry and Human Nutrition, Pomeranian Medical University, Szczecin, Poland., Banaszczak M; Department of Biochemistry and Human Nutrition, Pomeranian Medical University, Szczecin, Poland., Ryterska K; Department of Biochemistry and Human Nutrition, Pomeranian Medical University, Szczecin, Poland., Jakubczyk K; Department of Biochemistry and Human Nutrition, Pomeranian Medical University, Szczecin, Poland., Piotrwski J; Department of Biochemistry and Human Nutrition, Pomeranian Medical University, Szczecin, Poland., Hołowko J; Department of Biochemistry and Human Nutrition, Pomeranian Medical University, Szczecin, Poland., Drozd A; Department of Biochemistry and Human Nutrition, Pomeranian Medical University, Szczecin, Poland., Wysokińki P; Medical Education Unit, Pomeranian Medical University, Szczecin, Poland., Ficek K; Department of Medicine and Sport Physioteraphy, Academy of Physical Education in Katowice, Katowice, Poland., Wilk K; Faculty of Physical Culture and Health Promotion, University of Szczecin, Szczecin, Poland., Lubkowska A; Department of Functional Diagnostics and Physical Medicine, Pomeranian Medical University, Szczecin, Poland., Cięszczyk P; Department of Physical Education, Gdańsk University of Physical Education and Sport, Gdansk, Poland., Bertrand J; Department of Hygiene and Physiology, Military Institute of Hygiene and Epidemiology, Warsaw, Poland., Stachowska E; Department of Biochemistry and Human Nutrition, Pomeranian Medical University, Szczecin, Poland. |
| Abstrakt: |
The aim of the study was to investigate the efficacy of 6 week Mediterranean diet or 30% calorie restriction on the fatty acid profile and eicosanoids (hydroxyoctadecadienoi acids and hydroxyeicosatetraenoic acids) concentration. Furthermore, basic biochemical variables such as insulin, glucose, HOMA-IR, and a lipid profile were estimated. The study enrolled 94 Caucasian former athletes aged 20-42, with body height of 179 ± 16.00 cm and body mass of 89.26 ± 13.25 kg who had not been active for at least 5 years. The subjects were randomly assigned to one of the three intervention groups: CR group - the 30% calorie restriction (n = 32), MD group - the Mediterranean diet (n = 34), and C group - a control group (n = 28). The pattern of nutrition was analysed before and after the experiment using the 72 h food diaries. In order to evaluate the effect of diet intervention, the following variables were measured: anthropometrics, basic biochemical variables (insulin, fasting glucose, HOMA-IR, lipid profile), fatty acids and their blood derivatives profiles. The CR group showed significantly lower levels of several biochemical variables, i.e., BMI, total cholesterol LDL, TG, total lipids, insulin and HOMA - IR (p < 0.05). Subjects consuming the MD diet significantly decreased their BMI and reduced the level of total lipids (p < 0.05). We did not find any significant changes in the C group. The analysis of the fatty acid profile revealed that the CR group had a significantly decreased EPA level (p < 0.05). The MD group showed a significantly increased level of the DHA (p < 0.05) and improvement in the omega - 3 index (p < 0.05). Subjects following the MD also showed significantly lower concentrations of 15 - hydroxyicosatetraenoic acid (15-HETE). We did not observe any significant differences between the CR and C groups. Within short time, calorie restriction helps to improve lipid variables and insulin resistance. The MD diet seems to be more advantageous in the decrease of inflammation, but does not improve basic biochemical variables. We can conclude that calorie restriction can be a good choice for former athletes, although EPA and DHA supplementation is needed. |
