نشریه پژوهش در تغذیه ورزشی
پیاپی 2 (تابستان 1401)

In the present study, the effect of strawberry extract on some oxidative, inflammatory and cellular damage indices due to acute resistance exercise in non-athlete women was investigated.

Materials: 

14 healthy non-athlete girls in a randomized, double-blind, placebo-controlled, crossover study in two complementary and placebo conditions (height: 162.5 7 2.7, weight: 70.4 6 6.3, body mass index: 2/2) 26.7 ، 1, age: 24.7 3 3.5). Subjects took 350 mg twice daily for 14 days before a resistance training session with strawberry extract or placebo (maltodextrin) supplement. Serum blood samples were collected for total antioxidant capacity, malondialdehyde, reactive protein C and creatine kinase, before the supplementation period (baseline), before and after a session of acute resistance exercise.

Total antioxidant capacity in complementary conditions before resistance exercise and after resistance exercise was higher than before supplementation (p <0.05). Malondialdehyde levels were higher than complementary conditions in placebo conditions and in the stages before resistance exercise and after resistance exercise (p <0.05). C-reactive protein did not change significantly (p <0.05). Creatine kinase levels in placebo conditions were higher after resistance activity than before supplementation and before resistance activity (p <0.05).

The results of the present study showed that strawberry extract supplementation may play a role in reducing cellular oxidative stress and cell damage due to strenuous exercise.

Obese women are prone to metabolic diseases due to the amount of abdominal visceral fat and decreased muscle mass. The aim of this study was to evaluate the effect of the  8 weeks of interval training  with consumption of black seed on serum vaspin levels in obese women.

28 obese women with body mass index above 30 were divided into four groups: control, supplement, exercise and supplement-exercise for 8 weeks of interval trainin  with 3 sessions per week for 45 minutes. They performed for 60 minutes. So that in the first week, three 4-minute performance with an intensity of 90% of the heart rate and in the eighth week, five 4-minute performance with an intensity of 90% of the reserve heart rate with 2 minutes of rest was active. Groups taking the supplement daily took two capsules of 1000 mg of black seed powder at noon and night after each meal for eight weeksone-way analysis of covariance was used at the significance level of (a = 0.5).

According to the results of the present study, there are no difference serum levels of vaspin after traning between the four groups of control, supplement, exercise and supplement-exercise. (P=0.447). But there was a significant difference between lipid profile changes including triglyceride (P = 0.003), HDL (P = 0.001), LDL (P = 0.005) after intermittent exercise between the four groups of control, supplement, exercise and supplement-exercise. 

Due to the significant difference in lipid profile, interval training  along with consumption of black seed can improve the lipid profile of obese women.

The aim of the present study was to investigate the effect of short-term use of taurine supplementation on muscle strength and response of muscle injury indices and hs-CRP with one session of intense resistance activity in resistance training men.

20 resistance training men (age: 25.60 33 3.33 years and body mass index: 25.75 36 1.36 kg / m2) were selected as the available sample and randomly divided into two complementary groups of taurine and placebo. Were. The first and second blood samples were collected before and after the first HIRE session, respectively. Subjects then took 3 1000 mg capsules of supplement or placebo daily for 2 weeks and followed their usual exercises, the volume and intensity of which were similar between the two groups. Intragroup changes were analyzed using dependent t-test and changes in blood factors were analyzed using repeated measures analysis of variance and Bonferroni post hoc test. Also, intergroup differences were examined by independent t-test.

Findings showed that CK values before supplementation and after supplementation, LDH before supplementation and after supplementation were statistically significant. Plasma changes in hs-CRP before and after supplementation were not statistically significant. Also, no significant difference was seen between the two groups in any of the measured variables.

2 weeks of taurine intake appears to have a significant effect on maximal strength of upper and lower torso muscles as well as hs-CRP response and CK and LDH enzymes of trained men with no resistance following a HIRE session.

The aim of this study was to investigate the interactive effect of a period of high-intensity interval training and cinnamon supplementation on the levels of some inflammation and anti-inflammatory markers in overweight and obese men.

40 obese and overweight adult men with body mass index greater than 26 kg / m2 were randomly divided into 4 groups: 1) Cinnamon supplement, 2) HIIT training, 3) HIIT supplement + HIIT training, and 4) placebo Were classified. Subjects were then subjected to various cinnamon supplement interventions and HIIT exercises for 8 weeks. Anthropometric, inflammatory and anti-inflammatory indices were measured in two stages: pre-test and post-test.

The results of data analysis showed that serum levels of IL-6 and TNFα and insulin resistance index in the complementary groups, HIIT training and supplement + HIIT training in the post-test were significantly reduced compared to the pre-test (P ≤ 0.05). While serum adiponectin levels in supplement groups, HIIT training and supplement + HIIT training had a significant increase in post-test (P ≤ 0.05). However, there was no significant difference between the groups in any of the variables (P ≥ 0.05).

According to the results, it can be said that performing HIIT training with and without cinnamon supplementation will probably improve insulin resistance in overweight men by reducing the levels of inflammatory markers and increasing anti-inflammatory markers.

Since limited studies have examined the simultaneous use of creatine and sodium bicarbonate supplements in team sports, the aim of this study was to evaluate creatine and sodium bicarbonate supplementation on anaerobic performance, fatigue index and futsal special performance test (FSPT (in elite futsal players.

32 futsal players (age of 22.23± 0 0.23 years) were selected objectively and randomly divided into four creatine, sodium bicarbonate, combined and placebo groups. FSPT and RAST anaerobicity test was performed .intervention During 7 days of supplementation, the creatine group received 20 grams of creatine daily, the sodium-bicarbonate group 0.3 mg / kg, the combined group (20 grams of creatine and 0.3 mg / kg sodium bicarbonate) and the control group 20 grams of starch, in four servings.

showed that the peak of anaerobic power of creatine and combination groups was significantly higher than the placebo group. There was no significant difference in the fatigue index of the groups. There is a significant difference between the time of FSPT of each creatine and combination groups with the placebo and sodium bicarbonate groups and between the creatine and combination groups in the post-test

Creatine supplementation, unlike sodium bicarbonate, improves the anaerobic and functional parameters of futsal players. Also, the simultaneous use of creatine and sodium bicarbonate, by enhancing the synergistic effect, gives a more positive response to the anaerobic and functional indices of futsal players

The aim of this study was to determine the effect of HMB supplement on the growth hormone and testosterone concentration following resistance exercise.

In a double-blind, randomized and placebo-controlled study, 10 college athletes with age (22±1.32), weight (45.76±9.13), BMI (23.7±1.99) and body fat percent (12.50±4.08) were randomly selected and ingested HMB (3 gr per day) and placebo (3 gr per day) for one week. Then, A washout period of one week was set between supplementation periods. After one week of supplementation period, subjects performed resistance exercise included 3 sets of bench press, lat pull down, leg extension, leg curl, biceps curl, triceps curl and shoulder press with 85% of 1RM and 2 min rest intervals between sets and exercises. Before and after resistance exercise blood samples were taken. After a week rest, subjects recalled, then supplement and placebo changed for each subject . They performed the same resistance exercise as previous session. After completion of resistance exercise blood samples were collected for measuring growth and testosterone hormones by ELISA method.

The results using ANOVA with repeated measures showed that one week ingestion of HMB significantly increased TS levels, but didn’t affect GH hormone secretion.

Based on the results, it seems that short-term ingestion of HMB can induceded increase in secretion of TS anabolic hormones after resistance exercise in athletes.