جستجوی مقالات مرتبط با کلیدواژه « lactic acid » در نشریات گروه « تربیت بدنی »

Judo is a sport that imposes significant physiological demands on Judokas. In judo, the production of lactic acid and the decrease in body PH are the causes of damage to sports performance. The purpose of the present study is to investigate the effect of 4 - week of circuit training based on judo techniques with L-arginine supplementation on blood lactic acid level and functional indicatiors of male judokas.

In a semi experimental research project, 20 healthy male judoka with an average age of 17.85 ± 1.77 years were selected by available sampling method. The subjects were randomly divided into two groups of exercise-supplement (10 people) and exercise-placebo (10 people). Two groups performed circuit training based on judo techniques for 20 minutes with an intensity of 85-90% of maximum heart rate as the main training protocol (3 sessions per week for 4 weeks). The subjects of the exercise-supplement group consumed one gram of L-arginine tablets at the rate of 4 grams per day for 4 weeks. ).

A significant decrease in blood lactate level was observed in the exercise-supplement group (P<0.05). A significant increase in aerobic power and anaerobic power, a significant decrease in fatigue index were observed in both groups (P<0.05). These changes were significantly higher in the exercise-supplement group (P<0.05).

Performing judo specific circuit training along with L-arginine supplementation improves aerobic and anaerobic capacity, reduces fatigue index and reduces lactic acid production in male judo kas.

Long-term endurance training improves aerobic capacity and lactic acid indicators during rest and sports activity. Increasing aerobic capacity and reducing lactic acid by consuming garlic can enhance these beneficial effects and therefore can increase endurance performance. Therefore, this study was conducted with the aim of investigating the effect of 8 weeks of endurance training with garlic supplementation on aerobic capacity and lactic acid in non-professional middle-aged female athletes in zanjan city. Healthy non-athlete women were randomly divided into four groups [garlic supplement (with an average age of 52.33), exercise (53.60), garlic and exercise supplement (53.93) and a control (with an average age of 63.53)]. After Bruce's test (pre-test), a garlic supplement group, a training group (only training) and a garlic supplement and training group (garlic plus training) were given, and the control group did not perform any specific activity. The subjects, at the end of the eighth week, were again Bruce's test was performed to analyze the data, independent t-test and covariance analysis were used, and the significance level was 0.05 in all tests. The results showed that there was a significant difference between the consumption of garlic supplement, exercise, garlic with exercise in increasing aerobic capacity and reducing lactic acid. Also, after 8 weeks, garlic supplementation caused a significant difference in maximum oxygen consumption compared to the control group. The findings of the present study show that consuming garlic during exercise has a significant effect on increasing aerobic capacity and reducing lactic acid in non-athletic women.

post-activation performance enhancement (PAPE) along with speed interval exercises (SIT) leads to the activation of neuromuscular mechanism and physiological adaptations in football players. In this regard, the aim of the present study was to evaluation of power and lactate indices of elite football players following a period of PAPE and SIT training. For this purpose, 20 elite football players of Pas Club (practice experience of 4.3 years, age 17±6 years, weight 70±5 kilograms, body mass index 21.60±2)  voluntarily participated in this research. The participants were divided into two groups of 10, squat-plyometric (SP) and control. The SP group followed the PAPE and SIT training program for 4 weeks during 2 sessions a week on Sundays: SIT training with 5 repetitions of 30 seconds of maximum effort with 5:00 active rest between each repetition was performed in the first week and in the fourth week active rest up to 3:30 decreased between each repetition. Thursdays: half-squat PAPE training with 40% of maximum strength to the point of exhaustion, then 7 minutes of active rest, then 2 times of 4 repetitions of half-squat with 80% of maximum strength, and immediately they performed 2 times of plyometric training, jumping over 5 obstacles of 70 cm, and after 2 minutes of rest Active, RAST test was performed. The roast test was performed in two stages before and after the test, and blood was drawn after 5 minutes. The analysis of covariance test showed that SP training group performed better than the control group in terms of metabolic and functional indicators, p≤0.0001. In connection with the lactate index, the results showed a very high increase in the training group in the pre-test stage, p≤0.0001. In the intragroup analysis, the results showed a better performance of the SP training group in lactate, maximum power, minimum power, average power, fatigue index in the post-test stage. But this difference was not significant for the control group except for the lactate index in other indices. According to the findings, it seems that PAPE guidelines with SIT can be considered an effective strategy for changing lactate metabolism and functional components of anaerobic power, in the specific preparation season before the competition, young athletes should be considered and trained athletes should train with maximum relative intensity to improve their capacities and physiological adaptations.