فهرست مطالب mohammad mehrtash

Nowadays, the use of green tea supplements has increased. Studies have shown that green tea can have positive effects on anti‑inflammatory and antioxidative factors, as well as improve aerobic performance capacity. Therefore, in this study, we investigate the effects of this supplement on inflammatory factors, total antioxidant capacity responses, and maximum oxygen uptake (VO2 Max) of healthy young men in summer.

This study is a double‑blind randomized controlled trial (RCT) in which 15 young men (age 25.06 ± 2.1) were randomly assigned into the green tea (GT) and placebo groups. Subjects performed maximum aerobic exercises (shuttle run 20 m) in separate workouts (14 days) in summer. They consumed 640 mg green tea extracts or maltodextrin 90 min before exercise in a double‑blind design. Blood samples were collected before and after the exercise and then evaluated in the biochemistry laboratory. In this study, one way analysis of variance (ANOVA) tests were used for the statistical analysis.

The results of this study show that green tea supplement significantly slowed down the increasing tumor necrosis factor alpha (TNF‑α) (GT: 15.03 ± 4.31 [pg/ml], placebo: 31.38 ± 7.18 [pg/ml], [P = 0.000]); increased the total antioxidant capacity (GT: 1.04 ± 0.06 [mm], placebo group: 0.72 ± 0.04 [mm], [P = 0.001 VO2 ]); and Max (GT: 44.43 ± 3.06 [ml/kg/min], placebo group: 34.88 ± 1.30 [ml/kg/min], [P = 0.001]) in the supplement group than placebo. In addition, no significant differences in interleukin 1 beta (IL‑1β) was observed between thee groups (GT: 26.86 ± 5.05 [pg/ml], placebo group: 23.47 ± 3.16 [pg/ml], [P = 0.251]).

The consumption of green tea supplements 90 min before aerobic exercise may decrease inflammation and oxidative stress factors and improve VO2 Max in summer.

Excessive fat accumulation is one of the most important mechanisms of type 2 diabetes and insulin resistance. Accordingly, in this study, we will examine the effect of caloric restriction on lipid coat proteins that prevent lipolysis of the adipose tissue. In this study, 30 adult male Sprague-Dawley rats (200 ± 20 weight) were used. First, rats were divided into 2 groups (standard and high-calorie diet). After 8 weeks, the high-calorie diet group was randomly assigned to two subgroups: caloric restriction and high-fat diet. Finally, the amount of perilipin 1 and 5 genes expression evaluated by Pcr and insulin resistance evaluated by HOMA index.
Findings: The weight and insulin resistance of the high-fat diet group was significantly higher than the standard and calorie restriction group (p≤0.005). Insulin resistance was not significantly different between the caloric restriction and standard group (p = 0.394). The expression of perilipin 1 in the adipose tissue of the high-fat diet was significantly higher than the caloric restriction group (p ≤0.005). The expression of perilipin 1 gene in skeletal muscle in the high-fat diet group was significantly higher than the calorie restriction and standard diet groups (p≤0.005). The calorie restriction group had more perilipin 5 expressions than the high-fat diet and the standard group (p ≤0.005). The caloric restriction may be due to the effect on lipid coat proteins and, as a result, a decrease in fat accumulation, that it can prevent insulin resistance

The consumption of caffeine supplements has increased among athletes. This supplement has anti-inflammatory effects and can improve athletic performance. The aim of the present study was to investigate the effects of this supplement on the inflammatory responses and performance of military students in hot environments.
After completing the consent and health forms, 15 healthy male military students participated in the study. Subjects were randomly divided into two groups of caffeine (n=8) and placebo (n=7). They consumed 6 mg/kg of body weight caffeine and maltodextrin as placebo 90 minutes before test. Subjects performed maximal aerobic exercises (20 meter Shuttle Run exhaustive Test) in hot temperatures (38 centigrade) in summer. At the end, the maximal oxygen consumption was calculated by a formula (Number of shuttles with beeps). In order to evaluate TNF-α and IL-1β, 5 cc blood samples were collected from the brachial vein before and after test.
The results showed that caffeine supplements significantly decreased TNF-α (caffeine group: 17.94±5.29, placebo group: 31.38±7.18) and increased VO2max (caffeine group: 41.73±2.86, placebo group: 34.88±1.30). At the same time, no significant differences was seen in IL-1β (caffeine group: 21.52±3.36, placebo group: 23.47±3.16) (P≤0.05).
It can be concluded that the consumption of caffeine supplements 90 minutes before exercise may decrease TNF-α and improve the performance in hot temperatures.

The purpose of this study was to survey of the physiologic and anthropometric profile of professional male Gymnasts in Kerman and Guilan provinces and comparing them with the norm. Subjects included 20 professional male gymnasts from Kerman and Guilan provinces with mean age 15.2±2.2 yrs, weight 51.35±13.24 kg and height 161.80±11.36 cm. Data were analyzed by using descriptive and inference Statistic (t student) at P

Regular moderate intensity physical activity and lipid lowering effects of Nigella sativa(N. sativa) supplementation may be appropriate management for sedentary overweight females. Therefore, the aim of the present study was to examine the effects of long-term N. sativasupplementation and aerobic training on lipid profile and maximal oxygen consumption (VO2max) in sedentary overweight females.In this randomized, double-blind, controlled trial, which was conducted in Kerman city (Iran), 20 sedentary overweight females were divided into two groups and assigned to N. sativasupplementation (N. sativacapsules) or a placebo for the 8 weeks, both groups participated in an aerobic training program (3 times/week). Each N. sativacapsule contained 500 ± 10 mg N. sativacrushed seeds and subjects had to take 2 g N. sativaperday for 8 weeks. Blood lipids and VO2 max were determined at baseline and at the end of 8 weeks. N. sativasupplementation lowered total cholesterol (TC) (P< 0.01), triglyceride (P< 0.001), low-density lipoprotein (LDL) (P< 0.001) and body mass index (P< 0.01) and increased high density lipoprotein (HDL) and VO2 max (P< 0.01). Aerobic training program lowered TC (P< 0.001) and LDL (P< 0.01) and increased VO2 max (P< 0.01). Furthermore,we observed a significant effect of aerobic training program and N. sativasupplementation lowered LDL and HDL (P< 0.05).The present study demonstrates that 8-week aerobic training plus N. sativasupplementation have a synergistic effect in improve profile lipid parameters.

Probably L-Carnitine can induce increasing of Pyruvate dehydrogenase activity، decreasing of lactic acid production and performance improvements due to the reinforcement of long chain fatty acid oxidation and stabilize of Coenzyme A (CoASH) to free Coenzyme A (COA). Based on this، the aim of this study was to investigate the effect of acute L-Carnitine supplementation on blood lactate، glucose، VO2max and anaerobic power in trained men. Sixteen trained men (aged 19-23) volunteers from University of Guilan، facul-ty of Physical Education and Sport Sciences participated as subjects in this investiga-tion. Subjects divided to aerobic (A) and anaerobic (An) group randomly. In a double blind design، subjects participated in two separated tests by one week. Subjects ingested 3 grams of L-Carnitine supplementation or placebo (maltodextrin) 90 minute before aerobic and anaerobic exercise. For aerobic activity used shuttle run 20 meter and for anaerobic activity used RAST test. Blood samples were collected 5 minute prior at rest and 4 minute post tests. Participants were asked in the morning to obtain fasting blood samples and perform tests. A t-test was used to detect differences between supplementa-tion and placebo groups in each exercise. L-Carnitine group ((A) 141. 25±20. 62 and (An) 145. 38±55. 47) significantly had lower lactate concentration than placebo ((A) 151. 00±20. 85 and (An) 152. 50±28. 59) after tests (P≤0. 05). L-Carnitine group ((A) 136. 00±19. 74 and (An) 115. 50±13. 64) had significa-ntly higher blood glucose compared to placebo ((A) 121. 62±15. 65 and (An) 110. 12±12. 63) too (P≤0. 05). Also، VO2max، mean and maximum anaerobic power in L-Carnitine group were significantly more than ones in placebo (P<0. 05). These findings indicate that acute oral supplementation of L-Carnitine can induce fatigue decreasing and improvement of aerobic and anaerobic performance.