Author(s): PLAVINA, L., Institution: NATIONAL DEFENCE ACADEMY OF LATVIA, Country: LATVIA, Abstract-ID: 357

INTRODUCTION:
The physical endurance exercises are important part of process for training professional skills and improving results of performance. The high physical load with dietary limits leads to conditions when total energy expenditure higher than energy intake. Related energy deficiency has impact on physical and cognitive performance, it could lead to changes of biochemical markers of antioxidative system, oxidative stress expression. The purpose of study was characterized changes of anti-oxidative system parameters in short period of high physical load and related energy deficiency, and associated oxidative stress markers with total antioxidant capacity status and with physical preparedness
METHODS:
The study group included 75 healthy persons in aged from 23 till 34 years. They participated in ten days long (total 24 hours) high intensity physical training with aerobic and strength training elements with combination to related energy deficiency. Dietary limits characterized with one meal in day, that had 700-800 kcal energy volume, no water limits. The antioxidative system activity was investigated by detection of superoxide dismutase activity (SOD), and total antioxidants capacity (TAC), glutathione system markers in plasma. Participants tested before physical training directly after ten day long physical training.
RESULTS:
The results revealed lowering of enzymatic proteins SOD activity(p=0.002) that connected to specific high physical load and related energy deficiency. The parameter of the non-enzymatic proteins of the antioxidative system (TAC) did not change during the intensive training (p=1) that assess positively. The training effect in study group manifested as increasing of oxidative glutathione concentration(p<0.001) and lowering of oxidative stress index(p=0.001). We found the correlation between, oxidative stress parameters and physical fitness level by using Spearman `s correlation analysis.
CONCLUSION:
Intensive physical load induced changes of parameters value for all participants. The correlation between oxidative stress parameters and physical fitness level indicated that physical fitness level optimizing the adaptation of participants to oxidative stress in specific short period of related energy deficiency and physical load, that minimized the training-related injuries and enhancing the physical performance.