Wyniki wyszukiwania - Biblioteka Nauki

1

Effect of consecutive aerobic and resistance exercise on cortisol, immunoglobulin A, and creatine kinase responses in male students

100%

Arazi H. , Azizi M.

Biomedical Human Kinetics

|

2011

|

tom 3

115-119

EN

Study aim: To investigate the effects of consecutive aerobic and resistance exercise on Cortisol, Immunoglobulin A (IgA), and Creatine kinase (CK) responses of male students.Material and methods: Eight subjects (mean age 21.0 ± 1.5 years) completed two trail, aerobic ergometer exercises (60% VO2max; 45-min) and resistance (80% 1RM; 45-min) exercise concurrently; each subject was his own control. Blood samples were collected pre-exercise, post-exercise, and 3 hours after exercise. One-way ANOVA with repeated measure and LSD post-hoc tests were used to evaluate changes in Cortisol, IgA, and CK during baseline and exercise periods.Results: During baseline, there were no differences between exercise day (ED) values and those obtained at rest day (RD) for Cortisol, IgA, and CK. After exercise, Cortisol concentration in ED was significantly higher than RD (p<0.05); however, changes in IgA and CK responses were not significant.Conclusions: This type of consecutive exercise didn't increase susceptibility to upper respiratory tract infection and muscle damage. Therefore, it can be useful for the preparation phase of training for athletes.

2

Effects of eight weeks of TRX versus traditional resistance training on physical fitness factors and extremities perimeter of non-athlete underweight females

80%

Arazi H. , Malakoutinia F. , Izadi M.

Physical Activity Review

|

2018

|

tom 6

73-80

EN

Introduction: New form of suspension training (TRX) has been introduced which has the ability to develop physical fitness factors. The aim of this study was to compare the effects of eight weeks of resistance training by traditional and TRX methods on physical fitness f actors and extremities perimeter of non -athlete underweight girls. Material and methods: Thirty non -athlete underweight female students qualified with an average age of 23±1.64 years, weight of 43.53±0.28 kg, height of 162.66±6.6 cm and BMI of 16.31±0.2 kg /m 2 were selected and randomly assigned into three groups of 10 subjects (traditional, TRX and control) . Participants performed training of 3 sessions per week for eight weeks. Before and after the period of training, physical fitness variables including m uscular strength and endurance, flexibility, thigh and arm circumferences were measured. Results: The results showed that both forms of training had a significant effect on muscular strength and endurance. There was no significant difference in flexibilit y and thigh and arm circumferences. Conclusion: It can be concluded, that the traditional and TRX training have created almost same improvements in physical fitness factors, so TRX training can be considered an efficient choice to do alongside traditional training or as its alternative in order to earn desired training achievements. It is noteworthy that when training goal is to enhance muscular strength and endurance especially in upper -body, TRX training appears to be accompanied by greater gains compared to traditional resistance training.

3

The circulatory levels of Serotonin and Dopamine and physical fitness factors in active and inactive men addicted to opium during rehabilitation

80%

Arazi H. , Mollazadeh R. , Dadvand S. S. , Davaran M.

Physical Activity Review

|

2016

|

tom 4

1-8

EN

Addiction to drugs is one of the significant problems in many countries. Opium is a kind of drug that its use goes back to many years ago. Dopamine and serotonin are neurotransmitters involved in the process of addiction. As a result, this study aimed to investigate the blood levels of serotonin, dopamine and physical fitness factors in active and inactive men addicted to opium during their rehabilitation period. This study is a descriptive and Causal after the occurrence. A total of 34 men addicted to opium referring to rehabilitation center had been admitted voluntarily as samples were available in the study. According to a questionnaire answered by them, 16 of them did exercise during their rehabilitation period (active group) and 18 of them did not do any physical activity during this period (inactive group). 5 cc of peripheral blood samples were obtained from both groups and were tested their aerobic capacity, muscular endurance, flexibility, body composition, blood pressure and heart rate. Statistical analysis showed that blood levels of serotonin and dopamine in active group were significantly more than inactive group (p<0.05). In addition, the active group compared with the inactive group had low body fat percent, more muscular endurance, more flexibility, and low resting heart rate (p<0.05). According to the findings, we can conclude that low physical activity but as regular walking can affect blood levels of serotonin and dopamine, and health-related fitness factors of addicted men and as a non-drug treatment is helpful.

4

Correlation of anthropometric and bio-motor attributes with Special Judo Fitness Test in senior male judokas

80%

Arazi H. , Noori M. , Izadi M.

Ido Movement for Culture. Journal of Martial Arts Anthropology

|

2017

|

tom 17

|

nr 4

19-24

EN

Problem and aim. Most of the preceding studies on SJFT have investigated the performance of various judokas in this test and less attention has been paid to correlation between specific judo actions and prominent attributes related to judo athletes’ performance. The purpose of this study was to define the correlation between anthropometric and bio-motor attributes, and special judo fitness test. Methods. Fifty senior judokas (mean ± standard deviation: 20.75 ± 1.80 years old, 178 ± 4.20 cm of height and 21.32 ± 2.81 kg/m2 of BMI) were assessed for some anthropometric and bio-motor variables, and also specific judo fitness level. Results. Height was in inverse relationship with SJFT (P<0.05). While, the same but a stronger relationship (P<0.01) was found regarding sitting height and fat free mass. Moreover, a significant direct correlation was observed between body fat percentage and SJFT. Similarly, lower body strength, vertical jump height and flexibility (P<0.05), and hand grip strength and anaerobic power (P<0.01) were in inverse relationship with SJFT index. In return, speed (P<0.01) and agility (P<0.05) were directly related to SJFT index. Conclusions. It seems that excellent performance in specific judo actions depends largely on muscularity and superiority in anaerobic metabolism because of its correlation with attributes such as fat free mass, strength, speed and anaerobic power.

PL

Problem i cel. Większość poprzednich badań nad Specjalnym Testem Sprawności w Judo (po ang. SJFT) analizowała wyniki różnych judoków biorących udział w tym teście, mniej uwagi poświęcając korelacji pomiędzy konkretnymi działaniami judo a znaczącymi cechami związanymi z wynikami judoków. Celem niniejszego badania było określenie korelacji między cechami antropometrycznymi a bio-motorycznymi oraz specjalnym testem sprawności w judo. Metody. Oceniano grupę pięćdziesięciu judoków seniorów (średnia ± odchylenie standardowe: 20,75 ± 1,80 lat, 178 ± 4,20 cm wzrostu 21,32 ± 2,81 kg/m2 BMI) na podstawie niektórych zmiennych antropometrycznych i bio-motorycznych, a także określonego poziomu sprawności w judo. Wyniki. Wzrost był odwrotnie proporcjonalny do SJFT (P<0,05). Stwierdzono takie same, ale silniejsze relacje (P <0,01) dotyczące wysokości siedzenia i masy mięśniowej wolnej od tłuszczu. Ponadto zaobserwowano znaczną bezpośrednią korelację między procentem tkanki tłuszczowej a SJFT. Podobnie, niższa wytrzymałość ciała, pionowa wysokość skoku i elastyczność (P <0,05), siła chwytu ręki i moc anaerobowa (P<0,01) były odwrotnie proporcjonalne do indeksu SJFT. Z kolei prędkość (P <0,01) i sprawność (P <0,05) były bezpośrednio związane z indeksem SJFT. Wnioski. Wydaje się, że doskonałe wyniki w konkretnych działaniach judo zależą w dużej mierze od umięśnienia i przewagi w metabolizmie beztlenowym ze względu na jego korelację z takimi cechami jak: wolna od tłuszczu masa mięśniowa, siła, szybkość i moc anaerobowa.

5

A comparison of two aerobic training methods (running vs rope jumping) on health-related physical fitness in 10 to 12 years old boys

80%

Arazi H. , Jalali-Fard A. , Abdinejad H.

Physical Activity Review

|

2016

|

tom 4

9-17

EN

The purpose of this study was to compare of two aerobic training methods on health-related physical fitness in 10 to 12 years old boys. Thirty-three male students (age 11.27±0.64 year, weight 40.58±9.03 kg, height 151.45±6.34 cm) were recruited from preliminary school and randomly were assigned into rope-jump training (n=12), running training (n=11) and control (n=10) groups. Due to the grouping, each for 8 weeks did the rope jumping or running. Before and after the 8-week training period, factors of health-related fitness, including flexibility, muscular endurance, aerobic power and fat Percentage of the subjects were measured. The results indicated a significant positive effect of rope-jumping training on aerobic power, muscular endurance and body composition and meaningful improvement of aerobic power and body composition by running training (p≤0.05). Due to increasing urbanization and lack of space in homes and schools, rope-jump training can be a good alternative rather than running for physical fitness promotion.

6

The Effects of Whey Protein Supplementation on Performance and Hormonal Adaptations Following Resistance Training in Novice Men

80%

Arazi H. , Hakimi M. , Hoseini K.

Baltic Journal of Health and Physical Activity

|

2011

|

tom 3

|

nr 2

87-95

EN

Background: The purpose of this study was to determine the effects of whey protein supplementation on performance and hormonal changes during an 8-week resistance training program in novice weight trained men.Material/Methods: Forty recreational weight trained men were randomly divided into a whey protein supplementation (WP) group (n=20), and a placebo (PL) group (n=20). Each group was given either whey protein or a placebo in a doubleblind manner to be taken orally for eight weeks (1.8g/kg/day). WP and PL groups performed the same weight training program 3 days, each week for 8 weeks. The training consisted of 3 sets of 8 repetitions, and the initial weight was 80% of the pre-1RM. Subjects were tested for performance and blood hormone concentrations before and after the 8-week period.Results: The WP group achieved greater increases in body weight, explosive muscular power, muscle strength and blood testosterone when compared to the PL group; however, cortisol concentrations were significantly more reduced in WP group when compared to the PL group.Conclusions: It can, therefore, be concluded that within 8 weeks whey protein supplementation was found to increase explosive muscular power, body weight and muscle strength.

7

An Interaction between Exercise Order and Rest Interval during Lower-Body Resistance Exercise

80%

Arazi H. , Mirzaei B. , Sangdevini M. , Abadi M.

Baltic Journal of Health and Physical Activity

|

2012

|

tom 4

|

nr 2

77-83

EN

Background: The purpose of the present study was to compare the influence of two- and five-minute rest intervals on the number of repetitions per set and total repetitions per exercise for a lower-body workout performed in 2 different sequences.Material/Methods: 12 resistance trained men completed 4 experimental resistance exercise sessions. All sessions consisted of 3 sets with a 10-repetition maximum load for 4 lower-body exercises. Two different exercise sequences (i.e., A or B) were performed with either 2- or 5- minute rest between the sets and the exercises, respectively. The order of exercises for sequence A2 (SEQA2) and sequence A5 (SEQA5) was squat, leg curl, leg extension, and calf raise with 2- and 5-minute rest intervals between the sets and the exercises respectively. Conversely, for sequence B2 (SEQB2) and sequence B5 (SEQB5), the exercises were performed in the opposite order.Results: The results demonstrated a significant decrease from set 1 to set 2 in 3 exercises for SEQA2 and 2 exercises for SEQB2; from set 1 to set 3 in all exercises for SEQA2 and SEQB2, 3 exercises for SEQA5, and 2 exercises for SEQB5; and from set 2 to set 3 in 3 exercises for SEQA2, 2 exercises for SEQB2, and 1 exercise for SEQB5 (p<0.05). In addition, the total number of completed repetitions was significantly different (p<0.05) between sequences for squat (SEQA5 > SEQA2 > SEQB5 > SEQB2), leg curl (SEQA5 = SEQB5 > SEQA2 = SEQB2), leg extension (SEQA5 = SEQB5 = SEQB2 > ASEQA2), and calf raise (SEQB5 > SEQB2 = SEQA5 > SEQA2).Conclusions: The results indicate that during a lower-body workout reductions in the number of repetitions are greater for exercises performed at the end of the sequences, and the influence of the different rest interval lengths may depend on the position of the exercise in a sequence.