جستجوی مقالات مرتبط با کلیدواژه « تمرین های مقاومتی » در نشریات گروه « پزشکی »

Background and Objectives Recently, performing regular sports activities has been considered an effective strategy for the rehabilitation of patients who have recovered from COVID-19. The present study aimed to assess the effect of eight weeks of selected aerobic and resistance exercises on the plasma levels of irisin, follistatin, and fibroblast growth factor 21 (FGF21) in women who recovered from COVID-19. Subjects and Methods A total of 33 women who recovered from COVID-19 were assigned to three groups, namely aerobic exercise, resistance, and control, after the general call and selection. Aerobic training with an intensity of 50%-70% of the reserve heart rate and resistance training with an intensity of 40%-75% of a maximum repetition was performed for eight weeks (three sessions per week). Irisin, follistatin, and FGF21 levels were measured using the ELISA method. The data were analyzed using the analysis of variance statistical test at the significant level of < 0.05. Results As illustrated by the results, selected aerobic and resistance exercises caused a significant increase in irisin, follistatin, and FGF21 levels. The results of the post hoc test demonstrated that this increase was significant in the aerobic and resistance groups compared to the control group. Moreover, within-group changes pointed to a significant increase in the mean before and after the intervention in the aerobic and resistance groups. Conclusion Carrying out selected aerobic and resistance exercises in women who recovered from COVID-19 boosts their physical strength and is effective in quick recovery by restoring some indicators of myokine profile.

Recently, performing regular sport activities has received attention due to the release of Myokines in reducing the complications caused by Covid-19, especially reducing inflammation and oxidative stress, rebuilding and repairing damaged tissues and reducing metabolic disorders. The purpose of this study was to determine the effect of eight weeks of selected resistance training on the levels of Irisin, Follistatin and FGF21 in women who recovered from Covid-19.

Upon a public call, twenty-two women who recovered from Covid-19 in Abadan and Khorramshahr cities were selected and divided into two groups of 11 people, including the resistance training group and the control group, . The resistance training protocol was implemented for eight weeks and three sessions per week, including eight movements with an intensity of 40 to 75% of a maximum repetition. Blood sampling was done in two stages before and after the implementation of the protocol. The measurement of the levels of the Irisin, Follistatin and FGF21 was done by ELISA method and the data was analyzed using the covariance statistical test (ANCOVA) at the (p<0.05) level.

Comparison of the between groups data showed that the values of irisin (p<0.05), follistatin (p<0.05) and FGF21 (p<0.05) significantly increased in the resistance group compared to the control group. In addition, the examination of intra-group changes of irisin (p<0.05), follistatin (p<0.05) and FGF21 (p<0.05) indicated that there is a significant increase between the mean before and after implementation of the protocol in the resistance group.

It seems that resistance training leads to improvement of Myokine profile through the recovery of muscle mass in women recovering from covid-19.

There is a relationship between osteopontin and osteocalcin bone indices and diabetes and osteoporosis. The aim of this study was to determine the effect of 8 weeks of endurance training with taurine supplementation on the serum level of osteopontin and osteocalcin in male Wistar rats with streptozocin. In this experimental study, 30 adult non-nursing rats with a weight range of 250-300 grams and 6 weeks old were randomly divided into 3 groups including two diabetic groups, diabetic exercise+supplement (n=10) and diabetic control (n=10) and a non-diabetic group, healthy control (n=10). To induce diabetes, at the end of the eighth week, the amount of 55 mg per kilogram of body weight of streptozocin (STZ) was injected intraperitoneally. The exercise+diabetic supplement group performed combined exercises for eight weeks with a frequency of 5 times a week (endurance exercise with an intensity of 75% Vo2max on the treadmill and then strength training, climbing the ladder 15 times). At the same time as the exercises started, taurine supplement was added to the rats' food. One-way ANOVA and post hoc Bonferroni test were used to compare the mean of the variables between-group and paired samples T test was used to compare the mean of the variables intra-group. Osteopontin decreased significantly in the diabetic exercise+supplement group compared to the diabetic control group (P<0.001); On the other hand, there was a significant increase of 12.118% in the diabetic control group compared to the healthy control group (P<0.001). While, osteocalcin increased significantly in the exercise+diabetic supplement group compared to the diabetic control group (P<0.001) and decreased significantly in the diabetic control group compared to the healthy control group (p<0.001). Eight weeks of endurance training with taurine supplementation led to a decrease in osteopontin and an increase in osteocalcin. Therefore, people with diabetes and prone to osteoporosis are recommended to do combined exercises to prevent the development of this diseases.

Diabetes, as a progressive disease, can lead to decreased immune function. therefore, the aim of this study was to determine the simultaneous effect of resistance training and endothelial progenitor cell injection on immunoglobulins (IgA, IgM, IgG) of streptozotocin-induced diabetic rats.

 30 rats (aged 6 weeks with a mean weight of 200±20 g) were randomly divided into groups including Diabetes + stem cell injection + resistance training (n = 6), diabetes + resistance training (n = 6), diabetes + stem cell injection (n = 6), control diabetes (n = 6) and healthy basal (n = 6) Were divided. Western blotting was used to evaluate the changes in immunoglobulins. Also, two-way analysis of variance was used for comparison between and within the group, and for better understanding of the results, the effect size, and the amount of 95% confidence interval were given.

The results showed that IgA (P = 0.022), IgM (P = 0.017), IgG (P = 0.045) had significant changes between groups. Also, there was a significant difference in all three variables between the control diabetes group and the diabetes + resistance training + injection group (P≤0.05).

Summarizing the results of the present study, it can probably be said that resistance training and simultaneous injection of endothelial progenitor cells improve the status of immunoglobulins by training and injection. These findings suggest that resistance training and injections can be used as a treatment to improve the function of the immune system due to diabetes.

Nervous tissue apoptosis, especially of the hippocampus, has been identified as a potential contributor to neurological diseases such as Alzheimer's disease, and evidence suggests that exercise affects various aspects of nervous cell activity and may prevent the death of neurons cells. The aim of this study was to determine the effect of eight-week of resistance training on BAX and BCL2 in hippocampal tissue in male rats.

For this aim, 16 male rats were randomly divided into 2 groups of eight (resistance training  and control) and resistance training group exercised for 8 weeks and 3 days per weeks with eight frequency and 2 minutes rest between them with resistance ladder with 1 meter length and 85 degree angle. Sandwich Elisa method was used to measure BCL2 and BAX concentrations and U Mann-Whitney and Wilcoxon tests were used to test the hypotheses.

There was significant difference in BCL2 and BAX of hippocampus tissue in compared to control group, so that eight week resistance training causes significant increase in BCL2 level in resistance exercise group as compared to control group. Also eight week resistance training causes significant decrease in BAX level of resistance exercise group as compared to control group. Furthermore, eight week resistance training cause significant decrease in BAX/BCL2 ratio in resistance groups as compared to control group (p<0.05).

The results of this study showed eight-week resistance training causes significant increase in BCL2 and significant decrease in BAX and BAX/BCL2 ratio. Thus, it can cause decrease hippocampus tissue apoptosis in male rats.

The purpose of this study was to investigate the effect of 12 weeks of combined exercise on bone mineral density and some blood parameters in postmenopausal women with overweight. 29 inactive postmenopausal women with an age range of 58 to 46 years participated in this study. Subjects were placed in one of the two exercises (resistance-aerobic) and control (without exercise). Before and after the training period, weight, body mass index, fat percentage, bone density of the lumbar vertebrae and femoral head (in dexas), calcium and serum phosphorus were measured. The exercise protocol included upper and lower resistance exercises in 3 sets with 12 to 8 repetitions, and aerobic training including running and waving alternately for 12 weeks and 3 sessions per week. The data with normal distribution were analyzed using ANOVA and T-Paired methods and data without normal distribution using KruskalWallis and Wilcoxon. The experimental group showed a significant increase in serum calcium, bone density in the lumbar spine and neck (P<0.05). There was a significant decrease in weight, fat percentage and body
mass index (P<0.05). Serum phosphorus did not change significantly (P<0.05). The findings showed that in order to maintain or prevent the reduction of bone density, postmenopausal women are recommended to combine resistance and aerobic exercises

Objective Ageing is associated with some physiologic and functional declines that can increase disability, frailty, and falls in the elderly, so balance is used as a factor in determining the level of independence of the elderly. On the other hand, the mean velocity is considered as the most reliable indicator of the center of pressure to assess the balance and reduce the risk of falling. Because of significant effects of balance and muscle strength in the health of the more elderly population, the purpose this study was to investigate the effects of a nine- weeks training program on the center of pressure indicators with open and closed eyes condition in the elderly male.
Materials & Methods In this study, 27 elderly subjects with general health were participated voluntarily in this study. These were randomly divided into two training groups (n=15, mean age=61.5±08.59 years, weight=77.10±07.23 kg, height=167.6±6.4 cm) and control (n=12, mean age=62.6±08.44 years, weight=72.07±08.06 kg, height=167.9±01.08 cm). To assess the balance subjects were placed in a steady state on the foot scan at the beginning of the work, and the mean velocity of the center of pressure was first recorded in a static state with open eyes and then closed eyes. The kinetic data of the foot scan (mean velocity of the center of pressure) was calculated by RS-scan software, and the mean of the data was extracted from Excel software and evaluated. The training group then performed a nine-week program of lower limb muscle resistance training (on seven lower limb muscle groups including adductor and abductor of femurs, flexors, and extensor of femurs, flexors and extensor of knee, and plantar flexor of ankle) for 1.5 hour (15 minutes warm up, 1 hour of the main exercise, 15 minutes of cool down) and three sessions per week. During this period, the control group was requested to perform its daily activities. After completing the resistance training program, post-test was performed. Data were analyzed using independent and dependent T-analysis at a significant level (P≤0.05).
Results Lower limb muscle resistance training for nine weeks yielded a significant improvement in mean velocity of COP (P=0.005, t=3.07) and static balance with open eyes (P=0.004, t=3.46). In the training group, it has been pre-tested; however, no statistically significant effect was observed in static balance with closed eyes (P=0.15, t=1.49 ). Resistance training showed a significant difference between the control and the training group in the mean overall velocity of the center of pressure (P=0.04, t=2.43) and static balance with open eyes (P=0.01, t=2.39) as determined by independent t-test. This difference was not significant between two groups in static balance with closed eyes (P=0.22, t=1.25).
Conclusion The lower extremity muscle resistance training improves the center of pressure, static balance and reduces the fall risk. It is suggested that planning sufficient physical activities and training among all age groups is necessary. Appropriate resistance training program can prevent balance disorders and falling among the elderly population.

However the effects of endurance training on respiratory system is approved somedeal but, few and contradictory evidence exist concerning resistance training (RT), so the purpose of this research was therefore to study effects of eight weeks circuit RT (CRT) on pulmonary function of inactive women. Nineteen volunteer healthy inactive women were randomly divided into 2 groups: without training as control (C) and CRT. A spirometry test was taken 24 h before and after the training course. The training period (8 weeks, 3 sessions/week) for CRT involved two circuits/session, 40-60s for each exercise with 60-80% one repetition maximum (1RM), and 1 and 3 min active rest between exercises and circuits respectively. ANCOVA showed RT increased significantly (p<0.05) maximum voluntary ventilation (MVV), peak expiratory flows (PEF), forced expiratory flows 25%-75% ( FEF 25%-75% ), and forced expiratory volume in one second (FEV1) but, vital capacity (VC), forced vital capacity (FVC), and FEV1/FVC ratio didn’t change significantly. The results may suggest that the CRT can improve some pulmonary function factors of healthy young inactive women beside of other benefits of this type of training for women.

Considering the high sensitivity of bone to mechanical stimulations, one of the potential ways of impressing bone tissue in clinical perspective, is applying physical and mechanical loads. In this study, we compared the effect of progressive resistive exercise versus pulsed electromagnetic fields on total ALP, calcium, phosphorus and cortisol, and anthropometric variables in primary postmenopausal osteoporotic women.

Thirty estrogen-deficient postmenopausal women were assigned randomly to pulsed electromagnetic field therapy (PEMF), resistance training (RT), and control groups. Treatment in the PEMF group consisted of 45 min induction of rectangular wave with frequency of 30 Hz and intensity of 40 Gauss; the RT group consisted of performing trunk, upper and lower body resistance exercises that progressed during 6 weeks from 50% to 85% 1RM, for approximately 45 min, 3 days/week. Throughout this duration of six weeks, the control group was requested not to change their physical activity routines and dietary intakes. Blood total ALP, Ca2+, P, and cortisol was measured before and after 6 weeks.

After 6 weeks of PEMF or RT, total ALP increased significantly in the control group. Fat mass was significantly decreased in RT group after 6 weeks and increased significantly in controls. In all groups serum Ca, P, and cortisol showed no significant changes after 6 weeks.

Regarding the increase of total ALP in the RT and PEMF groups, it seems that PEMF can be used instead of RT for improving bone metabolism in high risk, severely osteoporotic patients.

The prevalence of obesity and its complications is rapidly increasing worldwide. Hence, the objective of this study was to determine the effects of 10 week progressive resistance training on serum levels of adiponectin and lipid profiles in obese men. In semi-experimental study, Sixteen obese men (Body Mass Index≥ 30, 18-32 years)) were selected between voluntary subjects and located randomize in to two resistance training (n=8) and control (n=8) groups. The experimental subjects received resistance training program. Progressive resistance training was performed three times a week on alternate days for 10 weeks and included 8 exercises. At baseline and after 10 weeks, Blood samples were taken in 12-14 hours fasting state from all subjects and investigated blood lipid profiles and adiponectin pre-post protocol. The paired and unpaired t-test in <0.05 significantly level were used in the statistical analysis. Compared to pre-training, after 10 weeks progressive resistance training, the serum adiponectin levels significantly increased (P<0.05) and total cholesterol levels significantly decreased (P<0.05) in the training group, while it remained unchanged in control subjects (P>0.05). According to this study, resistance training because of anti-inflammatory and hypolipidaemic effects has been an effective therapeutic devise to favorable changes in lipid profiles and adiponectin levels in obese individuals.