Banca de DEFESA: MARCIA REIMOL DE ANDRADE

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MARCIA REIMOL DE ANDRADE
DATE: 26/07/2022
TIME: 14:00
LOCAL: On-line
TITLE:

EFFECTS OF PHYSICAL EXERCISE ON THE LADDER AT DIFFERENT INTENSITIES ON THE GROWTH PLATE AND THE SOLEUS MUSCLE OF YOUNG RATS

KEY WORDS:

Climbing. Growth plate. Muscle hypertrophy. Physical exercise.

PAGES: 63
BIG AREA: Ciências Biológicas
AREA: Morfologia
SUMMARY:

Introduction: Physical exercise assists in the prevention of cardiovascular diseases, diabetes, and obesity, and its practice is encouraged since childhood, including in competitive activities. Thus, it is important to investigate the effects of high and medium-intensity physical exercise with weights on the stairs on muscle fibers and the epiphyseal plate of young rats, identifying their benefits and disadvantages. Objective: To evaluate the effects of high and medium-intensity physical exercise with weights on the stairs on the growth plate and muscle fibers of the soleus muscle in young rats. Methods: Climbing exercises with weights attached to the tail were performed in young Wistar rats divided into three groups of 8 animals each: control, high-intensity training, and medium-intensity training. The characteristics of interest regarding the growth plate were the cell count area, the number of cells per zone, and growth plate thickness. In the soleus muscle, the muscle fiber area and the number of fibers were calculated to assess muscle hypertrophy and even hyperplasia. Staining with Hematoxylin-Eosin (HE) was carried out for the soleus muscle and the growth plate, while Gomori’s trichrome was used for growth-plate staining. For the statistical analysis, the Shapiro-Wilk normality test was applied to assess the distributions of the means of each group, and one-way ANOVA was performed using Tukey’s posttest, considering a significance level of p<0.005. Results: A decrease in mean growth plate thickness and an increase in the area of the skeletal muscle fibers of the soleus muscle were identified in the trained groups compared to the control group (p<0.005). The growth plate showed lower thickness and cellularity in the physical training groups, evidencing different effects of physical exercise with weights on the growth plate and soleus muscle. Conclusion: It can be concluded that different effects occurred with high and medium-intensity physical exercise on muscle tissue hypertrophy and on the growth plate, highlighting the need for further investigation concerning the consequences on the growth of young rats.

BANKING MEMBERS:
Externo ao Programa - 2506557 - ALESSANDRO DE OLIVEIRA
Interna - 1742558 - FLAVIA CARMO HORTA PINTO
Externa à Instituição - IZABEL REGINA DOS SANTOS COSTA MALDONADO - UFV
Presidente - 1811013 - LAILA CRISTINA MOREIRA DAMAZIO