[The effect of intaking a new sport food on milk and fruit basis on blood biochemical indicators and antioxidant status in athletes].

Abstract

The problem of developing special food with targeted medical and biological properties is a pressing issue not only for sports medicine, but also for nutrition science. The aim of the research was to provide a medical and biological justification for the development and to evaluate the effectiveness of using new sport food (SF) in the form of a bar. Material and methods. The milk-fruit bar was developed on the basis of dry goat milk, dry whey, fruit and berry and grain raw materials, hydrolysate and isolate of plant and animal proteins, vitamin premix, as well as dry cultures of lacto- and bifidobacteria Bifidobacterium bifidum BB79, Streptococcus lactis SL215, Lactobacillus acidophilus LA72 (in a 1:1:1 ratio). The assessment of the effectiveness of a SF was carried out on 2 groups of professional athletes involved in martial arts (MMA), Greco-Roman wrestling, triathlons and pentathlon. 42 athletes were included in the control group and 46 athletes were included in the main group. Athletes in the main group consumed 4 milk-fruit bars (120 g) daily in addition to their basic diet, while athletes in the control group received placebo bars equivalent in calorie value (150 g). The complex examination before and after a 21-day training cycle, in combination with SF intake, included the study of body composition, hematological (red blood cells, hemoglobin, leukocytes, lymphocytes, erythrocyte sedimentation rate, hematocrit) and biochemical studies (plasma total protein, albumin, cholesterol, lactate) as well as studying the antioxidant status of athletes [malondialdehyde (MDA) and diene conjugates (DC) in blood serum]. Results. On the 21st day of SF intake, the cholesterol level decreased by 14.5-18.9% (p<0.05) in individuals involved in Greco-Roman wrestling, MMA and triathlon, in athletes involved in pentathlon - by 11.3% (p>0.05) compared to the initial level in blood plasma. Lactate level also lowered in athletes involved in Greco-Roman wrestling and triathlon by 14.2-28.3% (p<0.05), in other sports - by 12.2-17.6% (p>0.05). At the same time, these indicators did not change significantly in athletes from the control group. In addition, the lactate level in triathletes at the end of the study was 23.2% lower compared to the level in athletes from the control group (p<0.05). SF intake led to the decrease (p<0.05) in blood serum of athletes involved in the presented sports of MDA level by 20.0-27.9% (except for triathletes) and of DC - by 14.3-48.5% (except for athletes involved in Greco-Roman wrestling). In athletes of the control group after taking a placebo bar, the level of MDA significantly decreased by 20.0% only in individuals involved in MMA. Conclusion. The developed SF can be recommended for nutrition of athletes involved in various sports.