Search published articles

Showing 6 results for Dehkhoda

P Seif, M.r Dehkhoda, H Rajabi,
Volume 9, Issue 1 (3-2011)

In this study, the effects of vibration training on physical fitness factors in elderly
females investigated. 40 subjects with age 61/09±6/24 yrs, weight 65/84±11/98
kg, height 156/99±5/06 cm and body mass index 26/64±4/23 kg/m2 voluntary
participated in this study and were divided in vibration (n=16), non-vibration
(n=14) and control (n=10) groups. The vibration group performed exercises on
the device (JET VIB) for 10 days with 35-40Hz frequency, 12 mm amplitude and
eight positions. The non-vibration group performed the same exercises (in
position, set and time) on the turned off device. The control group did not
exercise during the study. Leg and hand strength (dynamometer), flexibility (sit
and reach), balance (standing time on one leg) and body composition (skinfold
with caliper) were measured. Paired sample t test and one way ANOVA used
for data analysis. In within group analysis, vibration group showed significant
increase in right (p=0/02) and left hand strength (p=0/01), leg strength
(p=0/008), Flexibility (p=0/005) and left leg balance (p=0/006). In non vibration
group just significant increase in right hand strength (p=0/01). There was no
significant change in control group. Between group analysis showed, significant
increase in right (p=0/006) and left hand strength (p=0/003), leg strength
(p=0/004) and left leg balance (p=0/01) in vibration group comparison with to
other groups. There was no significant change in right leg balance (p=0/),
Flexibility (p=0/005) and body composition in any of groups. Due to the results
short term vibration training can improve flexibility, strength and balance in
elderly subjects.

Jalil Ataei, Dr Mohammad Reza Dehkhoda, Dr Hamid Rajabi, Dr Naeima Khajavi, Sara Zarea Karizak,
Volume 12, Issue 8 (10-2014)

The purpose of this study was to compare effect of 4 weeks of strength training in two ways of accommodation and constant resistant methods on maximum strength and power of trained athletes. Sixteen Wushu athletes and wrestlers chosen from Tehran’s clubs with a mean age of 20.50 ±2.00years, height 174.34 ± 6.53cm, weight 70.22 ± 10.50 Kg, and body fat percent, 12.87 ±. 4. 23 participated in this study. After the initial testing of the variables of maximum strength (1RM), upper body power (medicine ball to throw, cm) lower body power (vertical jump, watt) Body fat percent (Skin Fold three point), limb circumference (cm) and Weight (kg), divided in two equal groups. Each group has done resistance strength training program for 4 weeks, three sessions per week, with 85% of their 1RM, with three sets and 5 repetitions with Squat and bench press exercises. But in case of accommodation group, 20% of their 1RM was used by chain through the full range of motion. At the end of the training, re-test of dependent variables were performed under similar conditions. Covariance analysis was used to compare the progressof power and strength between the two groups. This study showed that weight (p=0.391), limb circumferences (P=143), fat (P=0.413), the upper body power (P=0.267), lower body power (P=0.252) and the maximum upper body strength (P=0. 803) there was no significant difference between groups, but in case of maximum strength of lower body (P=0.04) there was significant difference between the two groups. In analyzing the results, although most variables did not show significant difference, but the effects sizeanalyzing of groups showed that in upper body power (ES=0.62), lower body power (ES= 0.64),upper body strength (ES=0.13)and lower body strength (ES=1.84), the results were in favor of accommodation group. This difference in the maximal strength in accommodation group were (62.15% in the upper body, 68.38% lower body) and in constant strength group (86.14% in the upper body, 84.21% in the lower body) respectively. Also the effect size of power for accommodation group were (97.6% upper body, 61.6% lower body) and in constant group (16.4% upper body, 67.4% lower body), respectively. This study showed that in order to increase maximal strength and power, accommodation training method is more effective than traditional constant training.

Mohammadreza Dehkhoda, Kazem Khodai, Sohrab Malekzadeh,
Volume 13, Issue 9 (4-2015)

The aim of this research was to study the effect of warm up with two different type intensity on plasma antioxidant enzymes and damage indices of lipid, protein and DNA after intensive activity in non-athlete males. 12 non athlete students of kharazmi University participated in this study. Firist, subjects VO2peak were measured by Gas analyzer (Meta Max 3B) on the ergometer cycle with incremental test. Work rate in the low and high intensities of warm up were calculated for each subjects on the VO2peak chart Then subjects in the three sessions with 48 hours interval divided to three groups of warm up with low and high intensity and non-warm. In each session resting blood sampling collected then first group warm up with low intensity (45-50% VO2peak) for six minutes and then perform intensive activity The Second group performed warm up with high intensity (75-80% VO2peak) and then intensive activity and third group directly without warm up performed intensive activity. Blood sampling collected after two hours of the intensive activity. In other sessions group members were changed by cross design method. Using analysis of variance with repeated measuring and the LSD test for statistic analyze. The results showed a significant differences in MDA, carbonyl-protein 8-hydroxy-2-deoxy Guanosine and also antioxidant enzymes SOD, CAT and GPX companing to resting state. Main difference of MDA and SOD was not signifacnatly lower in the low intensity warm up state rather than other state. In the other variables non warm up state have lower value and intensity warm up state have higher value. Result of the study indicate that low intensity warm up can decreased lipid damage but not effected on the protein and DNA damage. Also, High intensity warm up can case increases all three type of damage. Therefore low intensity warm up in non-athlete males is better than the high intensity warm up.
Mr Aidin Zarifi, Dr Hamid Rajabi, Dr Sadegh Hasan Nia, Dr Mohamadreza Dehkhoda, Dr Babak Mirsoltani,
Volume 13, Issue 10 (10-2015)

High-intensity interval training (HIT) induces skeletal muscle metabolic and performance adaptations that
resemble traditional endurance training despite a low total exercise volume. On the other hand, fatty acid
oxidation is increases in skeletal muscle with endurance training. This process is regulated in several sites,
including the transport of fatty acids across the plasma membrane. The transportation across this membrane is
recognized to be primarily protein mediated. Therefore, the purpose of this study was to determine the effect of
low-volume high intensity interval training on protein content of sarcolemmal fatty acids transporters (FAT/CD36
and FABPpm) in young men. Twenty recreationally active young men were assigned to a HIT (n=10, 19.3 yr old,
67.2 kg body wt, and 172.7 cm ht) or Control (n=10, 19.7 yr old, 65.9 kg body wt, and 174.4 cm ht) group. HIT
group performed three training sessions per week over 4 weeks. Each session consisted of 8-11×60 s intervals
at ∼100% of peak power output elicited during a ramp VO2peak test separated by 75 s of recovery. Skeletal
muscle (vastus lateralis) biopsy samples were obtained before and after training. HIT increased (17.5%)VO2peak (p<0.05). Also, after 4 weeks low-volume HIT, sarcolemmal content of CD36 and FABPpm increased
14 and 25 percent ,respectively (p<0.05). Therefore, the results showed that the practical model of low-volume
HIT could increase aerobic capacity and sarcolemmal content of CD36 and FABPpm. The increase indicates
that the facilitation of in muscle fatty acid transportation can be adapted which in turn increases the fat oxidation

A Gorzi, H Rajabi, R Gharakhanlou, M.r Dehkhoda, M Hedayati,
Volume 15, Issue 13 (9-2017)

The purpose of this study was to investigate the effects of 8 weeks of resistance training (RT) on activity of total and A12 Type of acetyl cholinesterase in Soleus muscles of rats. 16 male wistar rats provided from Razi institute (age: 10 weeks and weight: 172.415±7.090 gr), were randomly divided to 2 groups (Control; n=8 and RT; n=8). Training group carried out 8 weeks (5 session/week) of resistance training on 1-meter height ladder (divided by 26 stairs) with loading 30% of their body weight (suspended from the tail) in the first week which was gradually increased to 200% in the last week. Training included 3 sets of 4 reps with 3 min rest between sets. 48 hrs after last session of training, Sol muscles of animals moved out under sterilized situation by cutting on posterio-lateral side of hind limb. For separating AchE subunits, we used from homogenization and electrophoresis (0/06 non-denaturaing Polyacrilamide). Acetyl cholinesterase activity was measured by Elisa kit. Independent t-test showed that there was no significant differences between training and control groups in both total (p=0.262) and A12 forms (p=0.246) of AchE in soleus muscle. The reason for insignificant differences in acetyl cholinesterase of soleus might be indicative of no complete involvement of this muscle in this type of training and therefore no responsiveness of acetyl cholinesterase activity of this muscle following resistance training. However, this should be studied in future with higher volume and intensity of training. Because the increases in AchE content by training is not excluded yet.

Mohammad Azimnezhad, Pezhman Motamedi, Mohammadreza Dehkhoda, Neda Khaledi,
Volume 20, Issue 23 (9-2022)

Apoptosis is a programmed cell death and it’s associated with type 2 diabetes. The aim of present study was to investigate the effect of endurance training on caspase-3, Bcl-2 and Bax gene expression of cardiac tissue in type 2 diabetic male wistar rats.In an experimental trial, 36 male wistar rats were randomly divided into three groups, Diabetic Endurance Training (n=12), Diabetic Control (n=12) and Healthy Control (n=12). Type 2 diabetes was induced by intraperitoneal injection of STZ. The endurance training included 10 weeks, 5 sessions per week running at speed of 27 m/min for 20-30min in 1st week and reached to 27 m/min for 60 min/day in 10th weeks. The animals were sacrificed 24 h after last training session and the samples were taken from cardiac tissue. The gene expression of caspase-3, Bcl-2 and Bax were examined by Real time-PCR. The one-way ANOVA was used to analysis the data. The significant level was set at p<0.05. The gene expression of caspase-3and Bax of diabetic control group showed significant increase comparing with healthy control group (p =0.001) while gene expression of Bcl-2 significantly decreased (p =0.001). The endurance training induced significant reduction in the gene expression of caspase-3and Bax (p =0.001) and significant increase in the Bcl-2 compared to diabetic control group (p =0.001). It appears that gene expression of caspase-3, Bcl-2 and Bax of diabetic cardiac tissue are affected by positive effect of endurance training and the endurance training induces improvement in apoptosis of diabetic cardiac tissue.

Page 1 from 1     

© 2023 CC BY-NC 4.0 | Research in Sport Medicine and Technology

Designed & Developed by: Yektaweb