جستجوی مقالات مرتبط با کلیدواژه « Strength exercise » در نشریات گروه « پزشکی »

Although exercise is known as an effective factor in maintaining and improving bone strength; it is not clear that its effects on bone-forming and bone-eating cells of different age groups are the same. Therefore, this study aimed to investigate the effect of resistance-endurance training on the number of osteocyte, osteoblast, and osteoclast cells in femur bone tissue in male rats of different ages.

In the present study, 30 male Wistar rats in three age groups of 2 weeks, 6 weeks, and 96 weeks were randomly divided into 2 groups of 5 each, training and control. Resistance-endurance exercises were performed for 6 training sessions per week for 6 weeks. Rats were sacrificed under carbon dioxide gas. H&E staining was used for tissue microscopic examination.

The results of one-way analysis of variance with Tukey's post hoc test showed that higher amounts of osteoblast and osteocyte cells and lower amounts of osteoclast cells in trained rats of all three age groups were significant compared to their control group. The comparison of exercise groups showed that the number of osteoblasts in the child and adult groups, the number of osteocytes in the adult group, and the number of osteoclasts in the adult and elderly groups were higher.

The results showed that resistance-endurance training led to an increase in bone-forming cells and a decrease in bone-eating cells. However, the effects of exercise on bone formation in younger age groups were more than in old age. Nevertheless, the prevention of exercise from the process of bone loss in older age, especially old age, was evident.

With regular exercise, the heart undergoes structural and functional changes. The purpose of this study was to evaluate the right ventricular changes by echocardiography in military personnel participating in endurance or strength training.

This clinical trial was performed on 40 male military students at a military medical university in Tehran, Iran in 2018. Echocardiography was performed for all subjects at the baseline and clinical data were recorded and then the subjects were randomly divided into two groups. For one group endurance training and for the other group strength training was performed professionally for 10 weeks under the supervision of a sports coach. Echocardiography was performed for both groups after the end of the training and clinical data were recorded and changes were evaluated and analyzed.

Mean age and clinical data at baseline were not significantly different between the two groups. At the end of the study, after 10 weeks of exercise, a significant increase in RVAD and E/e 'was observed in either endurance or strength groups. The E/e', SWDT and Relative wall thickness showed a significant increase in the strength group compared to the endurance group. The exercise intervention decreased the RVAS in both groups, which was significant in endurance group. In SWDT and LV mass index, only significant increase was observed in endurance group. PAP only increased significantly in the strength group after exercise and was the only index that was in the abnormal range. In the other measured indices, there was no significant difference between endurance or strength groups before and after 10 weeks of exercise training.

The findings of the present study showed that both types of strength or endurance exercise have an impact on the functional status of the military heart, however, the strength exercise is more effective.