فهرست مطالب فرید فرحانی

The aim of this study was to evaluate neural (IEMG and RMS) and functional indexes after three weeks of Small Sided Game (SSGs) with continuous and interval blood flow restriction (BFR).

Eighteen futsalists (age 22.67 ± 1.14 years) were divided into three groups without BFR (n=6), BFR (n=6), and interval BFR (n=6). All participants in the three-week study were small sided game with blood flow restriction. Electromyography device and the isoknetic system were used to collect data related with electrical activity and isokinetic variables.

In the lunges, the electrical activity of recrus femoris and biceps femoris muscles, only in the blood flow restriction groups (BFR and Interval BFR), there was a significant increase between groups(P > 0.05). Shoot variables did not significantly increase between groups and intra-group (P < 0.05). Sargent jumps also did not significantly increase between groups (P > 0.05). Power was also increased in extension and flexion, only in groups with blood flow restriction significant increase between groups was found (P> 0.05). Work / body weight did not significantly increase between group and intra-group < br />(P < 0.05). The work fatigue and average peak torque had similar results, so that they only increased significantly in the Paired-Sample t-test groups with blood flow restriction (P > 0.05).

Although the results of the present study showed that the increase in functional and neural activation indexes in futsalists with blood flow restriction in the protocol training, but more research are needed in the field of BFR + SSG in order to recommend this protocol to coaches and futsalists.

Astronauts and those in microgravity (MG) conditions are faced with neuromuscular challenges. On the other hand, high intensity interval training (HIIT) have been introduced as an effective factor in strengthening the nervous system. Therefore, the purpose of this study was to investigate the effect of six weeks of high intensity interval training under simulated microgravity condition on brain degenerating myelin basic protein (dgen-MBP) level in healthy male rats.

Metohds:

This experimental study was conducted on 30 male rats with an average weight of 189.2 ± 5.7 grams. They were randomly divided into 5 groups: Base line (n=6), MG control (n=6), HIIT control (n=6), HIIT (n=6) and MG & HIIT (n=6). The training groups performed the HIIT on a treadmill, with 30 seconds running time of 29 m/min and a 1 minute rest time of 13 m/s to until the fatigue. Rats were killed 48 hours after the last training session and an ELISA kit was used to evaluate the data related to dgen-MBP.

The results of one-way ANOVA showed a significant difference between the groups in the functional test variables and dgen-MBP (P≤0.05). In the meantime, the MG & HIIT group showed the highest amount of dgen-MBP compared to the control group.

It seems that people who are in a microgravity situation, by applying HIIT training for at least 6 weeks, can increase their dgen-MBP levels, improve their health and nerves, and increase the time to fatigue.

Promoting factors associated with physical fitness and improving performance through new methods of training for soldiers is also important. The purpose of this study was to compare the three methods of resistance exercise (RE) with blood flow restriction (BFR) on functional factors in Iranian army soldiers. Eighteen Iranian soldiers with a mean age of 22.4±2.2 years, body mass index of 22.3±1.1 and a history of military services of 10.4±3.3 months were included. A total of 18 soldiers were randomly categorized in to three groups of resistance exercise with variable blood flow (R + BFRV, n=6), resistance exercise with variable intensities and constant blood flow restriction (R V + BFR, n=6) and resistance exercise with variable intensities and blood flow restriction (C, n=6). A total of 18 soldiers performed resistance training with BFR at the same training volume three days a week for four weeks. Significant variations were only observed in the upper endurance muscle variables (P=0.01) while there was no significant difference between other factors (P>0.05). The highest variations in cardiovascular endurance variables, upper and lower trunk muscular endurance and the mean anaerobic power occurred in the R+ BFRV group (P≤0.05), and the highest variations in upper and lower trunk muscular endurance occurred in R V + BFR group (P≤0.05). Group C showed the highest improvement in agility, and the same variations were observed in the balance in the three groups (P≤0.05). According to the results of this study, the resistance exercise with constant intensities was suitable for the increase in cardiovascular and muscular endurance and mean anaerobic power, the resistance exercise with variable intensities and constant blood flow restriction (R+ BFRV) was suitable for the increase in strength and balance, and the combined method was recommended for the increase in agility.