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Volume 3, Issue 2 (6-2004)
The Effect of Mental Practice on Increasing Maximal
Muscle Strength in 20-30 year old Healthy women
R. Hedayati MSc1*, GR. Oliaee PhD2, MR. Hadian PhD2, S. Talebian Moghaddam PhD3
H. Baghery PhD2
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1- Academic Member, Faculty of Rehabilitation, University of Medical Sciences, Tehran, Iran
2- Associated Professor, Dept. of Physiotherapy, Faculty of Rehabilitation, University of Medical Sciences, Tehran, Iran
3- Assistant Professor, Dept. of Physiology, Faculty of Rehabilitation, University of Medical Sciences, Tehran, Iran
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Backgrond: Researches have been carried out for several years, to find a way to treat muscular disorders, including weakness and atrophy which are consequences of the lack of movements. Clinicians are looking for a way to prevent these weaknesses and atrophies specially, when active movements are forbidden. It seems that mental practice can be a good answer to this problem. The aim of this study was to identify the efficacy of this kind of exercises on increasing muscle strength.
Materials and Methods: This study was performed on 30 young healthy females (20-30 years old), who were randomly divided into case and control groups. The case group performed imaginary maximal contractions of the elbow extensors for 3 weeks while the control group performed mathematical exercises at the same period of time. The amount of muscle extension torque of elbow was determined by Isostation B200 Dynamometer, before and after the intervention. The statistic analysis was performed with non-parametric tests of Mann-Whitney and Wilcoxon.
Results: Mental practice of strengthening tasks produced 50 percent increase in the isometric torque of elbow extension while control group showed only 7 percent increase in their torques .
Conclusion: It seems that we can use mental practice to increase or keep the muscle strength. It is suggested that physiotherapists combine this new method with the other common methods in their rehabilitation programs.
Key words: Mental Practice, Muscle Strength, Imagery
* Corresponding author Tel: (021)2516494
Journal of Rafsanjan University of Medical Sciences and Health Services, 2004, 3(2): 119-125
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Volume 4, Issue 4 (12-2005)
Comparison Between Heat and Cold in Basic Excitatory Responses in Healthy Subjects
R. Hedayati MSc [1] , M . Salavati PhD [2] , P Ghadiri MSc [3]
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Background and Objective: Heat and Cold are among the most important and effective methods in rehabilitation of neuromusculoskeletal disorders. However there has been a controversy concerning the physiological and clinical effects of heat and cold. In this article, the physiological effects of heat and cold have been assessed. Furthermore, the effect of these modalities on electrical stimulation thresholds has been studied.
Materials and Methods: This research that is a quasi-experimental study, has been performed on 30 healthy male and female students aged 20-30. After changing the skin temperature to 20 and 44oC by ice and hot packs respectively, all 4 stimulation thresholds (sensory, motor, pain and max pain) were recorded by the use of electrical stimulation.
Results: The present research indicated that heat modalities had no effect on stimulation thresholds but the cold caused a considerable increase in all of the electrical thresholds and the effect sustained for moments after removing cold modality.
Conclusion: Cold modalities change stimulation thresholds and in this regard they can be considered as effective ways for treating musculoskeletal disorders.
Key words: Sensory Threshold, Motor Threshold, Pain Threshold, Electrical Stimulation, Neuromuscular Junction.
[1] - Academic Member, Dept. of Rehabilation
(Corresponding author) Tel: : (021) 2516494 , Fax:(021) 2400110 , E-mail: rozhed@yahoo.com
[2] - Assistant Professor, Dept. of Rehabilation
[3] - Academic Member, Dept. of Rehabilation
Volume 10, Issue 2 (7-2011)
The Effect of Methanolic Extract of Otostegia persica on Serum Levels of Glucose and Liver Function Enzymes in Streptozotocin -Induced Diabetic Male Rats
M. Hedayati [1] , I. Pouraboli [2] , M. Mirtajaddini [3]
Received: 15/06/10 Sent for Revision: 04/09/10 Received Revised Manuscript: 17/10/10 Accepted: 31/10/10
Background and Objectives : With respect to antioxidant effects of Otostegia persica and the role of antioxidant agents in the treatment diabetes mellitus, in this study the effect of methanolic extract of Otostegia persica on the serum levels of glucose and liver function enzymes was investigated in diabetic male rats.
Materials and Methods : In the experimented study, type-I diabetes was induced in male rats by the injection of 70 mg/kg, i.p of streptozotocin. Blood samples were collected from rats for measuring glucose, ALT, AST and ALP in two ocassions 1- before inducing diabetes, 2- five days after streptozotocin injection. Diabetes was confirmed in rats if FBS level was above 250 mg/dL. Diabetic rats were divided into 10 groups received 100, 200 and 300 mg/kg extract, glibenclamide (600 µ g/kg) and distilled water (0.5 mL) daily for 6 and 14 days individually by gavage. After 6 and 14 days rats were sacrificed and serum levels of above factors were measured by spectrophotometery.
Results: . Administration of all doses of O. persica extract daily for 6 and 14 days decreased significantly the FBS serum level, significantly (p<0.05) . Administration of extract for 6 days, at doses 100 and 300 mg/kg decreased significantly AST, at doses 200 and 300 mg/kg decreased ALT and only at dose 300 mg/kg decreased ALP serum levels. Administration of extract for 14 days at all doses decreased significantly ALP, at doses 200 and 300 mg/kg decreased ALT and only at dose 300 mg/kg decreased significantly AST serum levels (p<0.05)
Conclusion: O. persica. metanolic extract reduces the serum level of glucose in diabetic rats significantly. Based on our results, not only O. persica has no side effect regarding the function of liver, but also imporves this function.
Key words : Diabetes mellitus, Otostegia persica, Liver enzymes, Rat
Funding: This research was funded by Shahid Bahonar University of Kerman.
Conflict of interest : None declared.
Ethical approval : This study followed principles in the Declaration of Helsinki.
How to cite this article : Hedayati M, Pouraboli I, Mirtajaddini M. The Effect of Methanolic Extract of Otostegia persica on Serum Levels of Glucose and Liver Function Enzymes in Streptozotocin -Induced Diabetic Male Rats . J Rafsanjan Univ Med Sci 2011 10(2): 84-93. [Farsi]
[1] - MSc, Dept. of Biology, School of Sciences, Shahid Bahonar University of Kerman, Kerman, Iran
[2] - Assistant Prof., Dept. of Biology, School of Sciences, Shahid Bahonar University of Kerman, Kerman, Iran
Corresponding Autor, Tel: (0341) 3222032, Fax: (0341) 3222032, E-mail: pouraboli_i@mail. uk.ac.ir
[3] - MD, in Medicine, Physiology Research Center, Kerman University of Medical Sciences, Kerman, Iran
Volume 12, Issue 11 (2-2014)
Background and Objective: The physiological changes in liver function in pregnancy are commonly transient and are rarely permanent. HIFs are important to treatment of injuries,inflammation and response to hypoxia. However exercise in pregnancy and some of environmental toxicities can influence HIF levels.The goal of this study was identification of endurance swimming by identifying HIF-1 proteins in pregnant rat liver exposure to cadmium.
Materials and Methods: In this experimental study, 32 pregnant wistar rats were randomly assigned to four treatment groups(n=8):control, exercise, cadmium and cadmium-exercise. Experimental group were exposed to intervention programs of of swimming and cadmium for 3 weeks.Training protocol included 60 minutes swimming (1h/day,5days/week) during pregnancy. The pregnant rats received 400 ppm cadmium as cadmium choloride in drinking water. Statistical analysis data was obtained by one-way analysis of vaiance and Scheffe method.
Results: There analysis of results showed, maternal weight and maternal liver weight of cadmium group were lower compared with control group. HIF-1alpha levels significantly increased in exercise group and cadmium-exercise group compared with cadmium group (p<0.001). In contrast serum HIF-1alpha levels in cadmium group significantly (p<0.001) decreased compared with control group,butsignificantly (p<0.001).
Conclusion: In conclusion, the findings data suggest that regular swimming exercise at submaximal intensity compensates of cadmium reducing effects of liver HIF-1alpha in pregnants rat.
Key words: Swimming, Hypoxia inducible factor 1 alpha, Pregnancy, Cadmium
Funding: This research was funded by personal contribution.
Conflict of interest: None declared.
Ethical approval: The Ethics Committee of University of Mazandaran, approved the study.
How to cite this article : Mirdar Sh, Memarian S, Hedayati M, Hajizade A. The Effect of Endurance Swimming Exercise on Hif-1 Levels in Livers of Pregnant Rats Exposed to Cadmium Toxicity. J Rafsanjan Univ Med Sci 2014 12(11): 919-28. [Farsi]
Volume 17, Issue 9 (12-2018)
Background and Objectives: Nowadays, the effect of exercise training and Aloe Vera supplement on diabetes has been identified, but the simultaneous effect of them on diabetes is unknown. Therefore, the aim of present study was to investigate the effect of eight weeks of high intensity interval training (HIT) and moderate intensity interval training (MIT) along with Aloe Vera intake on serum levels of chemerin, glucose and insulin in streptozotocin (STZ) induced diabetic rats.
Materials and Methods: In this experimental research, 32 males diabetic Wistar rats induced with STZ injection, were randomly assigned into four groups including diabetic, Aloe Vera (300 mg/kg), HIT+Aloe Vera supplement, and MIT+Aloe Vera supplement. Exercise training program was performed for eight weeks. Each exercise session consisted of 6-12 two-minute bouts (40 m.min-1 in HIT group and 25 m.min-1 in MIT group) that each bout followed by one-minute active rest. Chemerin and insulin levels were measured by ELISA method and data were analyzed using one-way analysis of variance and Tukey’s post hoc test.
Results: The results indicated a significant decrease of chemerin levels in the MIT group compared to the diabetic and HIT groups (p>0.001). Moreover, significant increase of serum insulin levels was observed in the HIT group compared to the other groups (p<0.001). Insulin increase in the supplement group was also significant compared to the diabetic and MIT groups (p<0.001). But, glucose changes were not statistically significant (p>0.05).
Conclusion: It seems that exercise training along with Aloe Vera supplement is effective in the improvement and control of diabetes, and probably this effect is due to the decrease in chemerin or increase in insulin levels.
Key words: High intensity interval training, Moderate intensity interval training, Chemerin, Rat, Aloe Vera, Diabetes
Funding: This research was funded by East Tehran Branch, Islamic Azad University, Tehran, Iran.
Conflict of interest: None declared.
Ethical approval: The Ethics Committee of Arak Medical University approved this study (REC.1396.32.IR.ARAKMU).
How to cite this article: Hedayati S, Riyahi Malayeri Sh, Hoseini M. The Effect of Eight Weeks of High and Moderate Intensity Interval Training Along with Aloe Vera Consumption on Serum Levels of Chemerin, Glucose and Insulin in Streptozotocin-induced Diabetic Rats: An Experimental Study. J Rafsanjan Univ Med Sci 2018; 17 (9): 801-14. [Farsi]
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