ABSTRACT
O objetivo do presente estudo foi verificar os efeitos de diferentes intensidades de treinamento físico aeróbio sobre a composição corporal de adolescentes obesos submetidos à intervenção multidisciplinar. O estudo caracterizou-se como ensaio clínico aleatorizado. Quarenta e dois adolescentes (13 a 17 anos) obesos (IMC = 34,48±3,88 kg/m²) púberes (estágio 3 e 4) participaram de 12 semanas de intervenção multidisciplinar. Os adolescentes foram alocados aleatoriamente em dois grupos experimentais: treinamento de alta intensidade (TAI) (n=20) - intensidade correspondente ao limiar ventilatório I (LVI); e treinamento de baixa intensidade (TBI) (n=22) - 20% abaixo do LVI. As sessões de exercício foram isocalóricas (350 kcal). Todos os voluntários receberam acompanhamento clínico, nutricional e psicológico. A massa corporal (kg), estatura (cm) e dobras cutâneas (mm) foram mensuradas. O percentual de gordura foi estimado por meio da equação de Slaughter, em seguida, a massa magra e massa gorda foram estimadas. Após 12 semanas de intervenção foram verificadas reduções na massa corporal, IMC e adiposidade em ambos os grupos (p<0,001), bem como elevação da massa magra dos adolescentes (p<0,001). No presente estudo, a intervenção multidisciplinar se mostrou efetiva na modulação da composição corporal e da adiposidade dos adolescentes obesos. Entretanto, tais resultados parecem ser independentes da intensidade de treinamento aeróbio a qual os grupos foram submetidos.
This randomized clinical trial aimed to verify the effects of different aerobic training intensities on body composition in obese adolescents submitted to a 12-week multidisciplinary intervention. Participants were 42 obese and pubscent adolescents (BMI = 34.48 ± 3.88 kg/m2; aged 13-17 years). The adolescents were randomized into two experimental groups: high intensity training (HIT) (n=20) - corresponding to the ventilatory threshold I (LVI); and low intensity training (LIT) (n=22) - 20% below LVI. Exercise sessions were isocaloric (350 kcal). All participants received nutritional, psychological and clinical follow-up. Body mass (kg), height (cm) and skinfold thickness (mm) were measured. Body fat (%) was estimated using the Slaughter equation, followed by the calculation of lean mass and fat mass. After the 12-week intervention, we observed a decrease in body weight, BMI and body fat in both groups (p<0.001), as well as an increase in lean body mass of the adolescents (p <0.001). In this study, the multidisciplinary intervention was effective to modulate body composition and adiposity among obese adolescents. However, the results seem to be independent of aerobic training intensities.
ABSTRACT
BACKGROUND: An excess of weight including obesity have reached epidemic rates in all age groups, both in developed and developing countries. It is notable that overweight children and adolescents have a higher likelihood of becoming obese adults and to present health-related problems early in life. OBJECTIVES: [corrected] To verify associations of the lipid and hematological profiles with adiposity in obese adolescents beginning multidisciplinary weight loss therapy. METHODS: This cross-sectional study was conducted with 85 adolescents of both genders, aged 12-19 years (Tanner staging 3 or 4) and body mass index greater than the 95(th) percentile. The sum of the triceps, subscapular and calf skinfolds and the waist circumference were used to estimate adiposity. Blood samples were collected from all patients after overnight fasting to analyze blood lipids (total cholesterol, high-density lipoprotein, low-density lipoprotein, very low-density lipoprotein and triglycerides), blood sugar and the hematological profile (hemoglobin, platelets and red blood cells). The Kolmogorov-Smirnov test and Spearman and Pearson correlation coefficients were used for statistical analysis with significance set for p-values ≤ 0.05. RESULTS: There were statistical differences between genders for red blood cells (p-value = 0.000), hemoglobin (p-value = 0.000) and platelets (p-value = 0.002). Positive correlations were found for red blood cells (p-value = 0.031) and hemoglobin (p-value = 0.024) with waist circumference. There was a negative correlation between hemoglobin and the sum of skinfolds (p-value = 0.022). CONCLUSION: The results demonstrate an association between the lipid and hematological profiles and body adiposity in obese adolescents thus reinforcing the importance of treating obese adolescents early to prevent health related problems in adult life.
ABSTRACT
Background: An excess of weight including obesity have reached epidemic rates in all age groups, both in developed and developing countries. It is notable that overweight children and adolescents have a higher likelihood of becoming obese adults and to present health-related problems early in life. Objetives: To verify associations of the lipid and hematological profiles with adiposity in obese adolescents beginning multidisciplinary weight loss therapy. Methods: This cross-sectional study was conducted with 85 adolescents of both genders, aged 12-19 years (Tanner staging 3 or 4) and body mass index greater than the 95th percentile. The sum of the triceps, subscapular and calf skinfolds and the waist circumference were used to estimate adiposity. Blood samples were collected from all patients after overnight fasting to analyze blood lipids (total cholesterol, high-density lipoprotein, low-density lipoprotein, very low-density lipoprotein and triglycerides), blood sugar and the hematological profile (hemoglobin, platelets and red blood cells). The Kolmogorov-Smirnov test and Spearman and Pearson correlation coefficients were used for statistical analysis with significance set for p-values ≤ 0.05. Results: There were statistical differences between genders for red blood cells (p-value = 0.000), hemoglobin (p-value = 0.000) and platelets (p-value = 0.002). Positive correlations were found for red blood cells (p-value = 0.031) and hemoglobin (p-value = ...
Subject(s)
Humans , Male , Female , Adolescent , Triglycerides , Body Mass Index , Cross-Sectional Studies , Adiposity , Lipid Metabolism Disorders , Hematologic Tests , Lipoproteins , Cholesterol, HDL , Nutrition Disorders/epidemiology , Obesity/epidemiologyABSTRACT
O objetivo do presente estudo foi comparar os efeitos do treinamento aeróbio de alta intensidade (TAI) com o de baixa intensidade (TBI) sobre a concentração circulante de leucócitos em adolescentes obesos. Quarenta e três adolescentes obesos (34,4±4,3 kg/m²) de ambos os gêneros (13 meninos e 30 meninas), com idade entre 13 e 18 anos, foram submetidos de forma aleatória ao TAI (intensidade correspondente ao limiar ventilatório I; N=20) ou TBI (intensidade correspondente a 20% abaixo do limiar ventilatório I; N=23) durante 12 semanas. Todos os voluntários receberam o mesmo acompanhamento clínico, psicológico e nutricional. Para ambos os grupos as sessões de exercício foram isocalóricas (350Kcal). A concentração total de leucócitos e subpopulações (monócitos, linfócitos e neutrófilos) foram determinadas por citometria de fluxo fluorescente antes (pré) e após (pós) a intervenção. Para a análise entre grupos e momentos foi utilizada ANOVA two way para medidas repetidas, com post-hoc de Fisher. Correlações entre as variáveis foram analisadas por meio da correlação de Pearson. Os resultados demonstraram redução na concentração circulante de monócitos tanto no TAI (pré: 0,63+0,10; pós: 0,3+0,10 ? p<0,001) quanto no TBI (pré: 0,73+0,27; pós: 0,39+0,19 ? p<0,001), sem diferença entre os grupos. Adicionalmente o foi verificado elevação dos neutrófilos apenas no grupo TAI (p=0,008). Dessa forma, podemos concluir que treinamento físico aeróbio, independente da intensidade, é efetivo no controle do estado inflamatório em adolescentes obesos, via redução da concentração circulante de monócitos.
The aim of this study was to compare the effects of a high intensity (HIT) vs. a low intensity (LIT) aerobic exercise training on leukocytes levels in obese adolescents. Forty-three obese (34.4 +4.3 kg/m²) from both genders (13 boys and 30 girls) aged between 13 and 18 years underwent randomically to HIT (intensity corresponding to ventilatory threshold I, N=20) or LIT (intensity corresponding to 20% below ventilatory threshold I, N=23) during 12 weeks. All volunteers accomplish the clinical follow-up (1x/month), psychological and nutritional counseling (1x/week). For both groups exercise sessions were isocaloric (150Kcal). Total leukocytes and subpopulations (monocytes, lymphocytes and neutrophils) were determined by fluorescence flow cytometry before and after intervention. For analysis between groups and time were used two-way ANOVA for repeated measures with Fisher as post-hoc. Correlations between variables were analyzed by Pearson´s correlation. The results showed reduction on circulating levels of monocytes in TAI (pre: 0.63+0.10; post: 0.3+0.10 ? p<0.001) as well as in TBI (pre: 0.73+0.27; post: 0.39+0.19 ? p<0.001), without groups differences. In addition it was verified a rise in neutrophils values (p=0.008). Thus we can conclude that aerobic exercise, regardless of intensity, is effective in controlling the inflammatory status in obese adolescents by reducing monocytes circulating levels.
Subject(s)
Humans , Male , Female , Adolescent , Exercise , Adolescent , Inflammation , ObesityABSTRACT
BACKGROUND: The aim of this study was to determine the acute effects of exercise intensity on anxiety, mood states and hunger in obese adolescents. METHODS: Subjects were eight male obese adolescents (age 15.44 ± 2.06 y; BMI 33.06 ± 4.78 kg/m2). Each subject underwent three experimental trials: (1) Control, seated for 30 min; (2) Low intensity exercise (LIE)--exercise at 10% below ventilatory threshold (VT); (3) High intensity exercise (HIE)--exercise at 10% above VT. Anxiety (STAI Trait/State), mood (POMS) and hunger (VAS) were assessed before and immediately after the experimental sessions. Comparisons between trials and times were assessed using Kruskal-Wallis and Wilcoxon tests, respectively. Associations between variables were described using a Spearman test. RESULTS: The largest increase in hunger was observed after LEI (914.22%). Both exercise sessions increased anxiety, fatigue and decreased vigor (p < 0.05). CONCLUSIONS: Acute exercise bouts are associated with negative changes in anxiety and mood, and with increases in hunger in obese adolescents.
