When the same participants were submitted to different exercise intensities, the acute and short-term effects of exercise on white blood cells were intensity-dependent immediately after exercise (i.e., lymphocytosis and monocytosis) and 2 hours after passive recovery (i.e., neutrophilia).
BackgroundThe aim of this study was to determine the acute effects of exercise intensity on anxiety, mood states and hunger in obese adolescents.MethodsSubjects were eight male obese adolescents (age 15.44 ± 2.06y; 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.ResultsThe largest increase in hunger was observed after LEI (914.22%). Both exercise sessions increased anxiety, fatigue and decreased vigor (p < 0.05).ConclusionsAcute exercise bouts are associated with negative changes in anxiety and mood, and with increases in hunger in obese adolescents.
BackgroundAn 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.ObjetivesTo verify associations of the lipid and hematological profiles with adiposity in
obese adolescents beginning multidisciplinary weight loss therapy.MethodsThis 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.ResultsThere 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).ConclusionThe 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.
Efeitos de diferentes intensidades de exercício sobre o gasto energético e a sensação de fome em jovens Effects of different exercise intensities on energy expenditure and hunger sensation in young adults
ResumoO objetivo do presente estudo foi verifi car os efeitos agudos de diferentes intensidades de exercício aeróbio (40 e 80% do VO 2pico ) sobre a ingestão alimentar pós-exercício. Participaram do estudo 18 adultos jovens, eutrófi cos (22,20 ± 1,72 kg/m²) e fi sicamente ativos. Todos os sujeitos foram submetidos aleatoriamente a três condições experimentais: controle (sem exercício); EBI, exercício de baixa intensidade (40% do VO 2pico ) e EAI, exercício de alta intensidade (80% do VO 2pico ). As sessões de exercício foram isocalóricas (350 kcal). Após 120 minutos de recuperação passiva, os voluntários tinham livre acesso a um "buffet" variado de alimentos, a ingestão alimentar foi determinada através da pesagem dos alimentos ingeridos. Os dados alimentares obtidos foram então tabulados e analisados por meio do "software" Nutwin 6.0 (UNIFESP, 2002), para estimativa do consumo energético total (kcal) e ingestão dos macronutrientes (carboidratos, proteínas e lipídeos) em gramas. Os resultados não demonstram nenhuma diferença na ingestão alimentar entre as condições experimentais analisadas. Dessa forma, podemos concluir que a ingestão alimentar pós-exercício não se mostrou dependente da intensidade do esforço em curto prazo em indivíduos adultos jovens fi sicamente ativos.
Introdução: A ingestão alimentar constitui-se em uma das maiores barreiras para intervenções em adolescentes obesos. Objetivos: Analisar os efeitos da intervenção multidisciplinar sobre a ingestão alimentar de adolescentes obesos. Métodos: Este estudo caracteriza-se como pré-experimental e descritivo. A amostra foi composta por 33 adolescentes obesos, com idade entre 12 e 18 anos. Os adolescentes receberam intervenção nutricional, psicológica, clínica e física. Utilizou-se o registro alimentar de três dias e o valor energético total da dieta foi estimado por meio do software Nutwin (antes e após 12 semanas). Diferenças entre os momentos foram determinadas utilizando-se o teste “t” de Student para amostras dependentes. Resultados: A intervenção foi eficiente na redução da ingestão energética total (p=0,05), ingestão de lipídios (p=0,02), proteínas (p=0,01) e sódio (p=0,02). Conclusões: A intervenção multidisciplinar foi capaz de alterar os hábitos alimentares dos adolescentes, o que é essencial para a redução ponderal e manutenção da massa corporal.
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