Showing 13 results for Resistance Training
Mohammadreza Rahimi, Neda Boroushak,
Volume 0, Issue 0 (11-2019)
Abstract
The main goal of this research was to design and evaluate the features of a "home-based weightless fitness device with digital adjustment" for performing muscular exercises in a home environment. To achieve this goal, a combined quantitative and qualitative approach was employed, and a detailed assessment of the device's performance was conducted. In the initial stage, existing fitness equipment, resistance training methods, and technological advancements were investigated. This review provided fundamental information for the initial design of the device. Subsequently, using design software such as Rhino Cross 6 and AutoCAD 2018, precise three-dimensional models and initial prototypes were created. To validate the device's resistance, a digital force gauge was utilized, measuring the displayed force in eight different settings with the resistance adjusted on the device, allowing for the calculation of device deviation from standard and error margin. Furthermore, to assess the device's reliability three seated movements—leg press extension, seated chest press, and seated front raise bicep curl—, each performed with eight consecutive repetitions using a 10-kilogram weight. The results of Pearson's correlation coefficient (0.9) showed that the instrument has high reliability. Also, the results of intra-correlation reliability coefficient (0.8) showed that the device has good reliability and high accuracy in the produced resistance in different movements and repetitions. Ultimately, this research introduces an effective tool for muscular exercises in a home setting. With its precise resistance adjustment capability and versatility in exercise options, the device empowers athletes to perform exercises with greater precision. Overall, this study yields practical and implementable results, potentially playing a crucial role in enhancing the health and fitness of athletes and the general community.
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Dr Sajad Karami, Dr Hamid Rajabi, Dr Fereshteh Shahidi, Dr Fereshteh Golab,
Volume 0, Issue 0 (11-2019)
Abstract
Introduction and purpose: Age-related changes in the expression of angiogenesis-stimulating and inhibitory genes are characteristics of aging and endothelial dysfunction. Aerobic exercise can stop or reduce this disorder. Considering the importance of resistance training in the rehabilitation of the elderly, the aim of this study was to investigate the compatibility of the response of the stimulating and inhibiting factors of angiogenesis after resistance exercise intervention in the elderly. Methodology: 24 elderly men with an average age of 67.75 years were selected in an accessible and purposeful manner. Blood samples were taken before and after a resistance activity session before and after 8 weeks of resistance training. Real Time PCR method was used to express HIF-1, VEGF, SDF-1 and VEGI genes in blood tissue. The difference in the values of the variables was evaluated by the method of analysis of variance with repeated measurement of mixed design at the level of P≤0.05 using SPSS software version 25. Findings: HIF-1, VEGF and SDF-1 gene expression levels of the training group increased in the stages of the primary post-test (after one session), secondary pre-test and secondary post-test (after 8 weeks of training) and VEGI had no gene expression. Discussion and conclusion: It can be cautiously said that although one session of resistance training leads to gene expression of angiogenesis factors, long-term resistance training with sufficient intensity and volume can It activates the rate of angiogenesis in a much wider range and should be considered as a supplement to aerobic exercises in old age.
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Volume 10, Issue 4 (10-2012)
Abstract
The purpose of this study was to investigate the effects of 8 weeks resistance
training (RT) on α -1A protein of pre-synaptic P-Q-type Calcium Channels in
FHL and soleus muscles of rats. 16 male wistar rats provided from razi institute,
randomly divided to 2 groups (Control-Sham; n=8 and Resistance Training; n=
8). Training group conducted 8 weeks (5 session/week) resistance program on
special 1 meter height ladder (divided by 26 stairs) with loading 30% body
weight (suspended from the tail) in the first week and increased to 200% BW in
the last week. Training includes 3 set of 4 reps. with 3 min. rest between sets.
Measuring α -1A protein with Western Blotting and independent T test showed
that the amount of this protein insignificantly increased in FHL muscles of RT
group (FHL: 77.88±10.67 vs. Control: 70.01± 6.28 and soleus: 72.71±19.72 vs.
Control: 72.57 ± 20.20). This insignificant increase in α -1A protein in FHL, can
shows an responsiveness of pre-synaptic P-Q-type Calcium Channels of
muscles following resistance training for improving Ach release from presynaptic
terminal, noted in NMJ adaptations . In conclusion, we can express
that probably resistance training can be a main factor for α -1A protein improving
in muscles and this case should be study in future investigations with high
volume and intensities training
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Volume 12, Issue 7 (4-2014)
Abstract
The purpose of this study was to determine the effect of combination specific resistance and ordinary swimming training on Breaststroke swimming performance in young boys. Twenty boys of Alborz province swimming team age of 13±1 years ,weight 50/ 65±1/02kg and height 159/8 ±4/91cm, participated in this study. After the initial testing of the performance variable (Fifty-meter record of Breaststroke swimming) , technical variable (stroke number) and strength variable (strength of spinal extensor muscles), subjects were randomly divided in two groups, Experimental group (combination specific resistance and ordinary swimming training) and control group(ordinary swimming training).A week of familiarization training was performed to adapt with vest (specific resistance) and then training program were performed for 6 weeks, three sessions per week .Training program consisted of 15minutes of warmup and 8 repeats of 50 meters breaststroke with 1minute rest interval between repetitions, in exprimental group (with vest of training) and control group(without vest of training). At the end of the training, post test was performed in accordance with the conditions of the pre test. Kolmogorov –Smirnov test was used to determine normality of data distribution, Paired t-tests was used to determine within group changes and the covariance analysis was used to compare the progress of dependent variables between the two groups. The results of this study indicated that although swimming performance was significantly improved in both groups (p≤0.05) ,but there were no significant differences between the groups in fifty-meter record of Breaststroke swimming, stroke number and strength of spinal extensor muscles (p≥0.05).It may be attributed to non-professional subjects or Low-intensity resistance training.
Abbas Keyhanian, Dr Khosro Ebrahim, Dr Hamid Rajabi, Dr Seyed Mohammad Marandi,
Volume 13, Issue 9 (4-2015)
Abstract
The aim of this study was to Compare the effect of resistance training with active and passive rest on aerobic
and anaerobic fitness in soccer players. For this purpose 16 players of Foolad Mobarakeh Sepahan club,
accidentally were divided into rest and active group (Height 177.78±6.68 cm, Weight 64.88±7.97 kg, age
18.22±0.83 years ,and percent fat 20.47±1.8) and rest passive group(Height 178.57±6.99 cm, Weight 64±
6.6kg, age 18±0.81 years ,and percent fat 20.05±1.7). The tests were performed in this order: maximal oxygen
consumption, maximal strength, Tmax, muscular endurance, Hoff and RAST test in the pre and post test. The
exercises were done for 8 weeks and twice week with 10 exercises of 30 to 50 percent of maximal strength
with this difference that the active rest group performed 3 sets of 20 repetitions exercise in 30 seconds that rest
interval between 30 seconds was completed with 2 sets of 10 repetitions exercise in 30 second. The passive
group performed 4 sets of 20 repetitions exercise in 30 seconds that rest interval between 30 seconds was
completed with 3 sets passive rest. After determining the normality by Kolmogorov-Smirnov test and
homogenous variance test, independent and dependent t-tests with a significant level of α ≥ 0.05 were used.
The results indicate that after the training period, a significant difference was found in all variables exceptfatigue index in active rest group. But in passive rest group there were a significant difference in variables AT,
vVo2max, Tmax, performance of Hoff test, bench press muscular endurance and leg press strength from pre
test to post test. The results between groups indicated that there was a significant difference between two
groups in Vo2max, Tmax, AT, vVo2max, leg press muscular endurance, and mean power in benefits of active
rest group. Finally, the results showed that the resistance training with active rest causes improvements in
aerobic and anaerobic fitness of soccer players in comparison to resistance training with passive.
Zahra Khadivi Burojeny, Hamid Rajabi, Mohammad Marandi, Shaghayegh Haghjoo, Alireza Khadivi Burojeny, Ebrahim Noorian,
Volume 16, Issue 15 (9-2018)
Abstract
The purpose of present study was to determine the effect of 8 weeks of resistance training on serumic myostatin, and Fibroblast Growth Factor-2 (FGF-2) level in male Wistar rats. 20 adult male wistar rats(150-250gr) were randomly divided into 2 groups [control group; n=10 (C), resistance training; n=10 (R)]. Resistance training was conducted for 8 weeks (5 session/week) on a special 1 meter height ladder (divided by 26 stairs) with loading of 30٪ of body weight (suspended from the tail) in the first week and increased to 200٪ of body weight in the last week. Training includes 3 sets of 4 reps with 3 minutes rest between sets. At the end of last week blood samples were taken from the rats and myostatin, TGF-β1 and FGF-2 was measured in three groups with the ELISA kit. At the end of the study ،the plasma levels of the myostatin decreased [71/82±19/62 mg/dl (R) ver. 105/86±17/49 mg/dl(C). (p≤0/001)], but the level of FGF-2 increased significantly in resistance training group [102/462±11/135mg/dl (R) ver. 86/96±12/606 mg/dl (C) (p=0/048)]. In contrast, the serum level of TGF-β was not statistically different between the two groups [153/48±54/09 mg/dl (R).160/62±32/85 mg/dl (C). (p=0/725)]. This study shows that 8 weeks of resistance training reduces serum levels myostatin and increased serum levels of FGF-2. These two factors cause activation or non-activation of satellite cells (Muscle stem cells that control muscle hypertrophy). However the nerve - muscle agents in the first 8 weeks of resistance training have the maximum participation on strength increases, but in this research we see affect the signals of satellite cells in the first 8 weeks of resistance training can change significantly. Also, although serum levels of TGF-β1 in the exercise group was significantly different from the control group, but the overall value of the exercise group had slightly reduced.
Vahid Fekri Kourabbaslou, Pezhman Motamedi, Sadegh Amani Shalamzari,
Volume 16, Issue 15 (9-2018)
Abstract
Eotaxin, a pro-inflammatory Adipokine is secreted from adipose tissue, which its secretion increases in the obesity and cause neurodegeneration. BDNF is a neurological factor that interferes with cognitive function, fat and sugar metabolism, as well as the pathophysiology of obesity and metabolic syndrome in adulthood. The aim of this study was to investigate the Effect of Six Weeks of Interval Resistance Training on Eotaxin and Brain-Derived Neurotrophic Factor Serum Levels in Overweight young men. Twenty non-active students without regular exercise program from Kharazmi University were randomly selected and divided into two groups of training (n=10) and control (n=10). The training group performed Interval resistance Training for 6 weeks, 3 sessions per week and each session lasted 45 minutes. The training program included 7 moves with intensity of 30-40% of 1RM and velocity 2v for 10 seconds and rest intervals with intensity 30-40% 1RM and velocity v for 20 seconds. Blood samples were taken before and after 6 weeks of training to evaluate the serum Eotaxin and BDNF levels using the Sandwich ELISA. To analyze the data, the covariance test and Bonferron's post hoc test were used to compare the variables. The results of covariance analysis and Bonferroni test showed that 6 weeks of Interval resistance training caused a significant reduction in the weight (p=0.003), body mass index (p=0.004) Waist circumference (p=0.012) and fat percentage (p=0.001). Also, significant increase was observed in muscular endurance (p=0.001), serum BDNF levels in the training group compared to the control group (p=0.024), and serum Eotaxin levels in the training group decreased significantly (p=0.022). Correlation results showed a significant reverse relationship respectively between pre and post training Eotaxin and BDNF (p=0.015 r=-0.511, p=0.013 r=-0.586). Weight loss through six weeks of Interval Resistance training, which accompanied the loss of adipose tissue; resulted in a reduction in serum levels of Eotaxin and increased serum levels of BDNF.
Vahid Fekri Kourabbaslou, Pezhman Motamedi, Sadegh Amani Shalamzari,
Volume 16, Issue 15 (9-2018)
Abstract
Eotaxin, a pro-inflammatory Adipokine is secreted from adipose tissue, which its secretion increases in the obesity and cause neurodegeneration. BDNF is a neurological factor that interferes with cognitive function, fat and sugar metabolism, as well as the pathophysiology of obesity and metabolic syndrome in adulthood. The aim of this study was to investigate the Effect of Six Weeks of Interval Resistance Training on Eotaxin and Brain-Derived Neurotrophic Factor Serum Levels in Overweight young men. Twenty non-active students without regular exercise program from Kharazmi University were randomly selected and divided into two groups of training (n=10) and control (n=10). The training group performed Interval resistance Training for 6 weeks, 3 sessions per week and each session lasted 45 minutes. The training program included 7 moves with intensity of 30-40% of 1RM and velocity 2v for 10 seconds and rest intervals with intensity 30-40% 1RM and velocity v for 20 seconds. Blood samples were taken before and after 6 weeks of training to evaluate the serum Eotaxin and BDNF levels using the Sandwich ELISA. To analyze the data, the covariance test and Bonferron's post hoc test were used to compare the variables. The results of covariance analysis and Bonferroni test showed that 6 weeks of Interval resistance training caused a significant reduction in the weight (p=0.003), body mass index (p=0.004) Waist circumference (p=0.012) and fat percentage (p=0.001). Also, significant increase was observed in muscular endurance (p=0.001), serum BDNF levels in the training group compared to the control group (p=0.024), and serum Eotaxin levels in the training group decreased significantly (p=0.022). Correlation results showed a significant reverse relationship respectively between pre and post training Eotaxin and BDNF (p=0.015 r=-0.511, p=0.013 r=-0.586). Weight loss through six weeks of Interval Resistance training, which accompanied the loss of adipose tissue; resulted in a reduction in serum levels of Eotaxin and increased serum levels of BDNF.
R Shiri, H Nikbakht, M Gholami, Kh Ebrahim,
Volume 18, Issue 19 (7-2020)
Abstract
Time under Tension of muscle is one of the variables of strength training that contributes to its adaptation. The present study was conducted the effects of six weeks of resistance training with the varying Time under Tension of muscle on VEGF and endosotene serum levels in healthy young women. This study was conducted on 20 female students (22.65±2.03years) Subjects were randomly and equally assigned to two groups with a Time under Tension of 1s- 1s(Normal Speed Contraction) and 3s- 3s (slow Speed Contraction). The exercise load was the same in both groups and resistance training was done in a circular manner for six weeks, three days a week in eight stations. Blood samples were taken from the subjects to study research variables before the training period and 48h after the last session of the training. Data were analyzed by covariance analysis at a significant level of P≤0.05. There was no significant difference between the serum levels of VEGF and endostein in both groups (P≥0.05). In the strength test, the SSC group experienced increase power further. However, there was no difference between the two groups in indicators related to angiogenesis for six weeks and most probably, for this indicator needed more training time, but practice with more Time under Tension (3s- 3s) can lead to increase power further.
Ebrahim Banitalebi, Mohammad Faramarzi, Farideh Savari Niko, Neda Soltani, Majid Mardaniyan Ghahfarrokhi,
Volume 18, Issue 20 (11-2020)
Abstract
Osteosarcopenic obesity is the result of processes that lead to muscle and bone breakdown and increased fat tissue. The purpose of this study was to investigate the effect of 12 weeks elastic band resistance training on functional indicators and Osteosarcopenic obesity index in women with Osteosarcopenic obesity. In this single blind randomized clinical trial, 49 elderly women with age 64.13 ± 3.6yrs, fat percentage 45.4 ± 6.56 %, T score of the minerals of the were -1.86 ± 1.42 were divided into two groups: control (n=22) and training (n = 27). The training group performed elastic band resistance training for 12 weeks. significant increases in short-term physical function (SBBP) (P = 0.024) and Z score of Osteosarcopenic obesity (P = 0.041), in the training group compared to the control group, and non-significant difference in muscle quality (MQ) (P = 0.200), fracture risk (FRAX) (P = 0.259), between exercise and control group. 12 weeks of elastic band resistance training seems to improve in short physical performance battery and Z score of Osteosarcopenic obesity in elderly women with Osteosarcopenic obesity, but, probably a longer period of training is needed to further influence the other osteosarcopenic obesity index.
Somaieh Mahdaviyan, Farshad Ghazalian, Khosro Ebrahim,
Volume 19, Issue 21 (9-2021)
Abstract
The aim of this study was to investigate the effect of 8-weeks of resistance training and vitamin D supplementation on some indicators of renal function in male rats with renal failure. Methods: In this experimental study, 16 male rats (7-8 weeks and mean weight: 350 to 370 gr) were divided into four groups (n = 4): training, supplement, training and supplement and control group. After induction of kidney damage through NX 5.6 surgical method and two weeks later, resistance training was performed for 8 weeks. Simultaneously, 1000 unit of vitamin D per week intramuscularly was injected. Finally, glomerular purification (using urea and creatinine levels) and serum levels of vitamin D, calcium and phosphorus were measured. Descriptive statistics, one-way ANOVA test and Tukey post hoc test were used to analyze the data. The results showed that glomerular filtration and vitamin D in the training and supplementation groups showed a significant increase compared to the control and training groups (P<0.05). However, Urea and creatinine and serum calcium and phosphorus significantly was decreased (P<0.05). It seems that the simultaneous use of resistance training and vitamin D supplementation can affect glomerular filtration rate.
Mr Kourosh Dehghan, Dr Khosro Jalali Dehkodi, Dr Farzaneh Taghian, Dr Mehdi Kargarfard, Dr Bahram Abedi,
Volume 21, Issue 25 (9-2023)
Abstract
Osteoporosis is the most common metabolic bone disease, and various factors such as low body mass index and lack of physical activity are involved in the occurrence of this disease. The aim of this study was to evaluate the effect of circular resistance exercises, whole body vibration and their combination on 25-hydroxyvitamin D, bone mineral density and functional factors in elderly people with osteoporosis. In a randomized controlled experiment with a pre-test-post-test design, 60 elderly men with osteoporosis with an age range of 65-78 years were randomly divided into four exercise groups: Circular resistance training (CRT, n=15), whole body vibration training (WBVT, n=15), combined (CRT + WBVT, n=15), and control (n=15). CRT with an intensity of 30 to 60% of the maximum repetition strength (1RM) was performed 3 times a week for 12 weeks. WBVT were performed in the form of 10 combined lower body and upper body movements with a frequency intensity between 25 to 45 Hz, an amplitude of 5 to 8 mm, and a time of each movement of 60 to 100 seconds, While the control group maintained their usual lifestyle. Body composition variables include; Fat-free weight (LBM), soft tissue weight (SLM) and skeletal muscle weight (SMM) using Body Composition Analyzer, bone density measurement using DEXA test and 25-hydroxyvitamin D3 before and after the last training sessions. Data analysis was done by using paired sample t-test and analyze of covariance (ANCOVA) at a level less than 0.05. After 12 weeks of intervention, a significant improvement in BMD, balance, coordination, muscle strength, lean weight and skeletal muscle weight was observed after CRT and CRT + WBVT exercises in comparison with the control group. However, no significant differences were observed between the groups in the variables of weight, body mass index, lean weight, soft tissue weight, skeletal muscle weight (SMM), BMD, balance, hydroxyvitamin D3 (p> 0.05). The findings of the current research show that performing CRT, WBVT and CRT + WBV exercises as a non-pharmacological treatment method can cause a significant increase in bone density and functional indicators of elderly men and has no effect on the hormonal indicators of elderly men with osteoporosis. Further studies with long-term follow-up should be considered to confirm these findings.
Javid Shah Hosseini, Arezoo Eskandari, Mohamad Fashi,
Volume 21, Issue 26 (12-2023)
Abstract
Using standard tests to assess maximum strength is very important where resistance training planning is based individually. This study aimed to estimate 1 repetition maximum of active women based on the Rating of Perceived and to provide a special predictive equation. 30 healthy women (20-35 years; BMI: 26.32 ± 3.34 kg/m2) performed one repetition of chest press with eyes close and then chose a number to determine the intensity by Rating of Perceived Exertion scale of 6-20. In order to evaluate the validity of the designed equation, one repetition of the maximum number of subjects was calculated by Brzycki equation, and correlation was determined by Pearson's correlation method. There was a high correlation between the present study equation and the Brzycki method (r=0.89) and also after cross validations (r=0.91). No significant difference was observed between the results of the present equation and the results of Berzyski's equation. It seems that the equation of the present study” 1RM={(20-RPE" /" 40) +1 }× weight/2 " can provide a reliable estimate for 1 repetition maximum of chest press in healthy women.
