Exercício físico e melhora do condicionamento aeróbio em adolescentes / Physical exercises and improvement of the aerobic conditioning in adolescents

AUTOR(ES)
DATA DE PUBLICAÇÃO

2010

RESUMO

INTRODUCTION - Exogenous obesity stems from inadequate dietary habits and a sedentary lifestyle. It has become a public health issue in our society today also, affecting adolescents. OBJECTIVE: To develop a simple implement for adolescents to evaluate the impact of a training program, predominantly aerobic, by way of moderate intensity physical activities, and consequently improve their physical conditioning. METHODS - A prospective study with a sequential convenience sample was carried out. The group was composed of 28 adolescents of both genders aged between 14 and 18 years old, students residents of Sao Paulo, patients at the Adolescent Ambulatory Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo, and with body mass index (BMI) above the third quartile (Q3) of BMI according to CDC-2000. All of the adolescents were submitted to a medical evolution and to ergoespirometric test on a treadmill before and after the program. After that, they participated into a predominantly aerobic training program for a period of 24 weeks. They had to cover a preset distance, three times per week, for a time period of 60 minutes. Cardiac frequency and perceived exertion on the Borg scale were evaluated. The performance of each individual was compared before and after the training program under the same conditions. The results obtained were analyzed by way of the paired t test ( 5%). The cases that did not present normal distribution were analyzed through the Wilcoxon signed rank test. The parameters measured were: BMI, VO2 max., time taken to perform the ergoespirometric test on a treadmill, maximum velocity attained on the treadmill test, and time taken to cover a distance of one Km with maximum physical effort. RESULTS- The performance before and after the test showed an improvement in the mean Z score for: BMI ( 1.7 1.2 P <0.0001 ); VO2 max ( 35.3 44.2 P<0.0001); time taken to complete ergoespirometric test on a treadmill ( 705.4 1024.3 P<0.0001 );maximum velocity attained during treadmill test ( 9.6 13.2 P <0.0001 ) ; time taken to cover a distance of one km with maximum effort (640.9; - 464.9 - P<0.0001). CONCLUSIONS - The implement proposed was proven to be effective for the reduction of excess weight and improve the aerobic conditioning of the adolescents. It is possible to compile a physical conditioning program, predominantly aerobic, without attaining physical exertion and to obtain results that evidence a significant improvement of the physical conditioning and nutritional state

ASSUNTO(S)

adolescente aerobic exercise obesidade obesity adolescent exercício aeróbio

ACESSO AO ARTIGO

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