Effect Of Intermittent And Continuous Training On Body Composition Cardiorespiratory Fitness And Lipid Profile In Obese Adolescents

We assessed the cardiorespiratory responses and exercise tolerance during 12 week training (intermittent vs. continuous) in obese children.Twenty nine obese adolescent were randomly allocated into either the IT or CT group.The CT group performed a 30 to 40 minute continuous exercises a 60% to 70 % of vVO2max.IT group was instructed to run for 2 min interspersed with recovery periods of one minute.The exercise intensity was 80% of the vVO2max increased by 5% every four weeks.Along the training period, the increase of the load was carried out by increasing the intensity and the number of repetitions.At baseline and after 12 weeks of intervention, cardiorespiratory fitness, body composition and lipid parameters were assessed.Improvement of Weight and Fat mass were significantly lower during the intermittent exercise (Weight (kg) =81.1±13.8 vs. 79.1±13.3 and Fat mass = 33.8±6.7 vs. 31.8±7.1 respectively) compared to the continuous exercise in the obese adolescent (Weight = 80.7 ±13.2 vs. 75.8±11.2 and fat mass = 33.7 ± 6.7 vs. 28.8±5.1 respectively).After the continuous training program, significant beneficial effects on the HDL-C (mmol.l-1)(0.97 ±0.06 vs. 1.12 ±0.1), ratio LDL-C/HDL-C (2.93±0.22 vs. 2.39±0.13),ratio TC/HDL-C (4.57±0.19 vs. 3.92±0.20).Improved capacity cardiorespiratory best of IT versus CT, at the Resting.HR (beats.m -1 ) (83± 4 vs78±3 and 78 ±4 vs. 76 ±3 respectively), systolic BP (mmHg) (p<0.01 vs. NS), VO 2 max (ml.min -1 .k - ) (p<0.001 vs. p<0.05)and recovery index (p<0.01 vs. p<0.05).Greater improvement in cardiorespiratory fitness of intermittent group compared to the continuous group.The other subjects who completed the continuous training program have improved their lipid profiles and their body composition more that the group intermittent.