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Volume 17, Issue 73 (7-2010)
Background: Not all patients benefit from ICSI. To establish the factors that affect the success rate of ICSI is probably useful in determining the prognosis of ICSI. The aim of this study was the evaluation of the relationship between semen parameters and the outcome of the Intra Cytoplasmic Sperm Injection( ICSI).
Methods: A retrospective case control study was performed on 523 infertile couple who were the candidates for ICSI. After performing ICSI, two positive increasing titers of β hCG test was considered as pregnancy. The results of semen analysis were compared in the two groups with or without pregnancy. SPSS V.16 was used for statistical analysis, and student t and Chi2 tests were used for comparison of parameters.
Results: Out of total 523 cases studied there were 106(20.2%) positive pregnancy tests ( pregnant group), and 417 cases without pregnancy( non pregnant group). Sperm count(49.10±2.78 million in pregnant group vs. 42.51±1.47 million in non pregnant group, p= 0.043), abnormal head ( 65.08±1.67 percent in pregnant group vs. 69.48±0.83 percent in non pregnant group, p=0.019), sperm agglutination ( high agglutination in 20.8% cases in pregnant group vs. 10.3% high agglutination in non pregnant group, p= 0.006), and leucocytospermia(1.04±0.09 in pregnant group vs.1.41±0.14 in non pregnant group, p= 0.026) showed statistically significant difference between the two groups. The other parameters including abnormality in tail and neck, semen volume and motility did not have significant difference.
Conclusion: More sperm count, less abnormal head and low leucocytospermia increase the success rate of ICSI. High agglutination does not reduce the success rate of ICSI.
Volume 20, Issue 112 (10-2013)
Background: Undesirable
work situations (such as awkward postures) can result in health issues such as
musculoskeletal disorders in addition to reduced productivity and efficiency.
The main purpose of this study was to determine the effect of these awkward
postures on attention task performance.
Methods: Hence by
designing two different simulated work stations, subjects were asked to
complete a relatively complicated cognitive task on a 1 hour experimental
session. RULA analytical method was used to evaluate the working postures. A
series of mathematical tests was used as a fatigue manipulation tool. Moreover
a subjective assessment was conducted by questionnaire.
Results: RULA score showed a significant
difference between groups (p< 0.001). This difference showed that subjects
in awkward posture reported more mental (p= 0.002) and physical fatigue (p=
0.023) than the standard posture group. The results also showed that awkward
posture is related to impaired selective attention (p= 0.028) and a poor
difference in the simple reaction time (p=0.050) was observed between the
groups.
Conclusions: This study
supports the theory that physical workload can interfere with cognitive
performance in a concomitant mental activity.
Volume 31, Issue 1 (3-2024)
Methods: At the beginning of the research, the animals were 6 weeks old with an average weight of 250 ± 5 grams. The rats were kept in groups of 10 under temperature conditions (22±2°C), 12-hour light-dark period. From the number of 30 male Wistar rats, 20 male Wistar rats after induction of diabetes by injecting 55 mg/kg streptozocin dissolved in citrate buffer (0.05 M with pH=4.5) (20) randomly in two Diabetic training group (n=10) and diabetic control group (n=10) and 10 healthy rats were included in the healthy control group (n=10). To ensure that the rats become diabetic, their blood sugar was measured 72 hours after the injection with the help of a glucometer (Active model, Accu-Chek company, made in Germany) and a blood sample taken from the tail vein of the rats. and blood sugar more than 250 mg/dL was considered as an indicator of type 2 diabetes (21). To implement the training program, two weeks after becoming diabetic, the training group performed the training protocol with an intensity of 70-85 maximum oxygen consumption for eight weeks (5 days a week and every day for 40 minutes at a speed of 10 meters per minute on the treadmill and climbed the ladder 15 times with a weight equal to 3% of body weight to the tail of the rodent). To perform endurance-strength training, first, the training started at a speed of 15 m/min and with an intensity of 40% of VO2max for 15 minutes on a treadmill with a 0-degree incline in the first session. At the end of the third week, the speed of the treadmill was fixed at 17 m/min and the duration of the exercise was increased to 30 minutes and 40 minutes in the second and third weeks, respectively. The speed and duration of running in the fourth week until the end of the eighth week were fixed at 20 meters per minute and 40 minutes respectively, and with zero-degree night until the end of the training sessions. The speed at which the blood lactate level reaches above 6 ml/liter was considered as the maximum speed. This test was done twice at the beginning and at the end of the experiment at the same time of the day (21). Resistance training, after endurance training, was done for 8 weeks, for 5 days a week in the form of climbing and climbing stairs, to In the first, second, and third weeks, the rats climbed 8, 10, and 12 times in each session with weights equal to zero percent of the rats' body weight, which were attached to the animal's tail. From the fourth week. Until the end of the eighth week, the rats climbed 15 times a week by carrying weights equal to 3% of the total body weight of the subjects (22). In addition, at the beginning of each session, the rats had 5 minutes of warm-up exercise (with an intensity of 10 meters per minute). and at the end, they worked for 5 minutes to cool down (intensity 10 meters per minute and gradually reducing the intensity to the lowest value) (25). Also, the healthy control group who did not participate in any activity program and did not become diabetic. Creating the same conditions as other training groups, 5 days a week for 10 to 15 minutes in each session, they were placed on the motionless treadmill to adapt to the environment.
Results: The results of the one-way Anova test showed that at the end of eight weeks, between body weight (P=0.043), BMI (P=0.043), renin (P=0.0001), angiotensin (P=0.0001) and aldosterone (P=0.0001) there is a significant difference between exercise-diabetic, diabetic control and healthy control groups. The serum level of renin in the diabetic exercise group had a significant decrease of 36.59% compared to the diabetic control group (P=0.0001) and a significant increase of 47.58% in the diabetic control group compared to the healthy control group (P=0.0001). The serum level of angiotensin decreased by 20.27% in the diabetic exercise group compared to the diabetic control group, which was not significant (P=0.150). On the other hand, there was a significant increase of 174.01% in the diabetic control group compared to the healthy control group (P=0.0001). The serum level of aldosterone in the diabetic training group decreased by 9.46% compared to the diabetic control group, which was not significant (P=0.531). On the other hand, there was a significant increase of 175.88% in the diabetic control group compared to the healthy control group (P=0.0001).
Conclusion: The findings of the present research showed that eight weeks of combined endurance-strength training caused a significant decrease in serum renin levels. While, there was no significant change in the serum levels of angiotensin, aldosterone, weight, height and BMI in the diabetic exercise group compared to the diabetic control group. The results of the current research and the studies conducted in this field indicate that exercise is effective in preventing high blood pressure caused by diabetes. Therefore, more research should be done to investigate the effect of exercise on the indicators of blood pressure and prevention of high blood pressure and diabetes, using human and animal subjects and in both males and females and in a longer period of time.
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