Low physical performance in obese adolescent boys with metabolic syndrome

Abstract

OBJECTIVE:To assess cardiorespiratory exercise function in obese children with and without metabolic syndrome (MS). DESIGN: Comparing three groups of subjects with different cardiovascular risk pro®les. SUBJECTS: Twenty-two MS (body weight (mean AE s.d.) 97.3 AE 15.3 kg; age (mean AE s.d.) 14.2 AE 1.9 y), 17 obese (82.6 AE 15.7 kg; 14.2 AE 2.6 y) and 29 normal weight control (64.3 AE 8.5 kg; 15.3 AE 1.0 y) boys. MEASUREMENTS: Exercise duration (ED), resting heart rate (HR 0 ), peak heart rate (HR peak ), physical working capacity at 170 beatamin (PWC-170), peak oxygen consumption (VO 2peak ) and the lactic acidosis threshold (LAT) were determined on treadmill, using a continuous ramp protocol. RESULTS: ED (MS (mean AE s.d.); 655 AE 86 s; obese 703 AE 64 s; control 750 AE 0 s) in absolute value and PWC-170 normalised for body weight (139 AE 40 w; 177 AE 40 w; 211 AE 40 w) were signi®cantly shorter and lower in the MS group, as compared to obese and control groups (P`0.05). VO 2peak (2.2 AE 0.4 lamin; 2.4 AE 0.5 lamin; 2.9 AE 0.4 lamin) and LAT (1.3 AE 0.4 lamin; 1.5 AE 0.4 la min; 1.8 AE 0.4 lamin) normalised for body weight, were signi®cantly shorter and lower in the MS group, as compared to control group (P`0.05). HR 0 was signi®cantly higher (P`0.05) in MS group than in obese and control groups (88 AE 12 bpm; obese 78 AE 10 bpm; 73 AE 10 bpm). CONCLUSION: Cardiorespiratory exercise performance capacity in MS boys are reduced. It still remains to be elucidated whether the metabolic alterations or the decreased physical activity is responsible for the observed reduction in cardiorespiratory performance. International Journal of Obesity (2001) 25, 966 ± 970

Teste ergométrico em crianças e adolescentes: maior tolerância ao esforço com o protocolo em rampa

“…BP showed slightly increased HR max, although the 3 to 4 bpm difference at peak effort carries no clinical significance. 24 have observed 29 normal boys to compare with those with plurimetabolic syndrome and isolated obesity syndrome: in the group of normal boys HR max was around 185 bpm.…”

Avaliação do programa de promoção da atividade física Academia da Cidade de Recife, Pernambuco, Brasil: percepções de usuários e não-usuários

“…A falta de atividades físicas regulares vem sendo considerada um fator de risco primário e independente para muitos agravos à saúde, particularmente as doenças cardiovasculares e metabólicas 2,3,4 . Apesar das evidências acumuladas sobre os benefícios da atividade física regular para a saúde, estudos têm indicado baixos ní-veis desse comportamento na população 5,6,7,8,9 .…”

Cardiovascular Fitness, Insulin Resistance and Metabolic Syndrome in Severely Obese Prepubertal Italian Children

“…On the contrary, several studies from Europe and USA on various ethnic groups with different levels of adiposity found an association between CV fitness and the MS [10,11,12] and an inverse relationship between CV fitness and IR indexes [13, 14]. …”