No significant associations between screen time with blood pressure and cholesterol were reported .
Sedentary behaviour appears to be associated with  adiposity in adolescents , irrespective of dietary intake .
Screen time , but not overall sedentary behaviour , is consistently related to cardiometabolic health in adolescents .
Because of the associations screen time has with dietary intake , diet may be an important factor in the screen time and health relationship ; however , evidence has not previously been synthesized .
Thus , the aim of this systematic review was to explore whether the associations between various sedentary behaviours and cardiometabolic risk markers are independent of dietary intake in adolescents .
Video game playing increases food intake in adolescents: a randomized crossover study.
BACKGROUND Video game playing has been linked to obesity in many observational studies . However , the influence of this sedentary activity on food intake is unknown . OBJECTIVE The objective was to examine the acute effects of sedentary video game play on various components of energy balance . DESIGN With the use of a r and omized crossover design , 22 healthy , normal-weight , male adolescents ( mean ± SD age : 16.7 ± 1.1 y ) completed two 1-h experimental conditions , namely video game play and rest in a sitting position , followed by an ad libitum lunch . The endpoints were spontaneous food intake , energy expenditure , stress markers , appetite sensations , and profiles of appetite-related hormones . RESULTS Heart rate , systolic and diastolic blood pressures , sympathetic tone , and mental workload were significantly higher during the video game play condition than during the resting condition ( P < 0.05 ) . Although energy expenditure was significantly higher during video game play than during rest ( mean increase over resting : 89 kJ ; P < 0.01 ) , ad libitum energy intake  after video game play exceeded that measured after rest by 335 kJ ( P < 0.05 ) . A daily energy surplus of 682 kJ ( 163 kcal ) over resting ( P < 0.01 ) was observed in the video game play condition . The increase in food intake  associated with video game play was observed without increased sensations of hunger and was not compensated for during the rest of the day . Finally , the profiles of glucose , insulin , cortisol , and ghrelin did not suggest an up-regulation of appetite during the video game play condition . CONCLUSION A single session of video game play in healthy male adolescents is associated with an increased food intake , regardless of appetite sensations . The trial was registered at clinical trials.gov as NCT01013246
No significant associations between screen time with blood pressure and cholesterol were reported .
Sedentary behaviour appears to be associated with  adiposity in adolescents , irrespective of dietary intake .
Screen time , but not overall sedentary behaviour , is consistently related to cardiometabolic health in adolescents .
Because of the associations screen time has with dietary intake , diet may be an important factor in the screen time and health relationship ; however , evidence has not previously been synthesized .
Thus , the aim of this systematic review was to explore whether the associations between various sedentary behaviours and cardiometabolic risk markers are independent of dietary intake in adolescents .