Oxidative stress in young judokas: effects of four week pre-competition training period

Abstract

Background The effects of long-term exercise on steady-state dynamics of antioxidant defence system are not clear yet fully, and there is an evident lack of studies focused on combat sports. This study aimed to evaluate the parameters of oxidative stress in young judokas during four weeks pre-competition training period. Material/Methods: Changes of oxidative stress parameters (malondialdehyde, catalase, carbonyl and sulphydryl groups, and total antioxidant status) were studied during four week pre-competition training period on a sample consisting of 10 male judokas (age 20±1.3 years, sport experience 11±3.4 years). Results: The changes in all examined oxidative stress parameters showed no statistical significance. Results also suggested that well-developed anti-oxidant defence, particularly because of the superoxide dismutase activity, kept the amount of oxidized proteins unmodified. The explanation for this finding can be found in the facts that the subjects, although of young age, had a long training and competitive experience with the similar training programs and that they did not undergo rapid weight reduction. Conclusions: The obtained results suggest that four week pre-competition training period pattern had no effects on oxidative stress parameters in well-trained young judokas, and that natural antioxidant defences of the body responded adequately to complex training program.

Effects of Eight Weeks of Aerobic Exercise on Markers of Oxidative Stress in Elderly Women

“…All significantly reduces angiotensin II levels that can consequently affect the production of ET-1 in endothelial cells (28). We also found that the eight-week aerobic exercise increases NO level, which is in line with some previous studies (21,29,30). Shear stress also increases NO production via activation of ion channels, especially potassium channels (35), which itself activates receptor tyrosine kinase (36).…”

“…However, Boghrabadi et al reported that aerobic exercise training causes a significant increase in ET-1 levels of young, middle-aged and old women (20). Radovanovic et al showed that four weeks of pre-competition training had no effect on oxidative factors such as MDA and NO in 10 male judokas (mean age: 20±1.3 years; sport experience: 11±3.4 years) (21). On the other hand, Sacheck et al showed that 12 weeks of downhill running for 45 min at 75% of maximum volume of oxygen (VO 2 max) increases serum concentrations of creatine kinase and MDA in healthy men (22).…”

Enhancement of Sports Nutrition Knowledge and Energy Intake after Sports Nutrition Education for Combat Athletes

“…The age distribution of participants in this study aligns with previous research on combat athletes, specifi cally young judo athletes, with an average age of 20 ± 1.3 years (Radovanovic et al, 2012). Additional research was conducted on karate athletes between the ages of 16 and 30, as documented by Rynkiewicz et al (2010).…”

The Usefulness of Performing Biochemical Tests in the Saliva of Kickboxing Athletes in the Dynamic of Training

“…Some studies have shown that use of natural antioxidants decreased the level of oxidative stress in athletes and accelerated recovery [24]. It is known that oxidative stress is one of the most important limiting factors influencing athletic performance, by modulating physiological and biochemical reactions as well as gene expression associated with the cellular stress response [25, 26]. Therefore, determination of indicators of lipid peroxidation and enzymes involved in antioxidant protection is important to estimate athletes' training efficiency in different sports, such as tennis [27] and judo [28].…”