Results Physical activity was associated with numerous health benefits .
The dose-response relations observed in observational studies indicate that the more physical activity , the greater the health benefit .
Results from experimental studies indicate that even modest amounts of physical activity can have health benefits in high-risk youngsters ( e.g. , obese ) .
Vigorous intensity activities may provide even greater benefit .
Aerobic-based activities had the greatest health benefit , other than for bone health , in which case high-impact weight bearing activities were required .
Some of the health benefits can be achieved through an average of 30 minutes per day . [
Level 2 , Grade A ] .
Background The purpose was to : 1 ) perform a systematic review of studies examining the relation between physical activity , fitness , and health in school-aged children and youth , and 2 ) make recommendations based on the findings .
Correlates of depression in a representative nationwide sample of adolescents (15-19 years) and young adults (20-24 years).
BACKGROUND The authors investigated correlates of depression in a general population sample of adolescents ( 15 - 19 years ) and young adults ( 20 - 24 years ) . METHODS As part of the Finnish Health Care Survey a r and om sample of 509 adolescents ( 281 females , 228 males ) and 433 young adults ( 224 females , 209 males ) was interviewed in 1996 .  DSM-IIR major depressive episode ( MDE ) was assessed by the University of Michigan Composite International Diagnostic Interview Short Form ( UM-CIDI SF ) . RESULTS In multivariable regression analysis , current smoking ( odds ratio ( OR ) 5.54 ; 95 % confidence interval ( CI ) 1.44 , 21.3 ) and chronic illness ( OR 3.77 ; 95 % CI : 1.04 , 13.7 ) associated with MDE among adolescents . Among young adults , drunkenness at least twice a month ( OR 4.48 ; 95 % CI : 1.44 , 14.0 ) or once a month ( OR 2.79 ; 95 % CI : 1.14 , 6.83 ) , not being married nor cohabiting ( OR 3.50 ; 95 % CI : 1.35 , 9.08 ) and infrequent physical exercise ( OR 4.01 ; 95 % CI : 1.18 , 14.0 ) were related to MDE . Female MDE associated with not being married nor cohabiting ( OR 3.56 ; 95 % CI : 1.23 , 10.1 ) and living in southern Finl and ( OR 2.30 ; 95 % CI : 1.06 , 5.02 ) . Drunkenness at least twice a month was related to MDE among males ( OR 4.54 ; 95 % CI : 1.27 , 16.3 ) . CONCLUSIONS Attention should be paid to compromised health and health-related behaviour associating with MDE in youth . Specifically , the association between smoking and major depression in early adolescence should be borne in mind , and drinking habits or frequency of drunkenness should be carefully noted
Results Physical activity was associated with numerous health benefits .
The dose-response relations observed in observational studies indicate that the more physical activity , the greater the health benefit .
Results from experimental studies indicate that even modest amounts of physical activity can have health benefits in high-risk youngsters ( e.g. , obese ) .
Vigorous intensity activities may provide even greater benefit .
Aerobic-based activities had the greatest health benefit , other than for bone health , in which case high-impact weight bearing activities were required .
Some of the health benefits can be achieved through an average of 30 minutes per day . [
Level 2 , Grade A ] .
Background The purpose was to : 1 ) perform a systematic review of studies examining the relation between physical activity , fitness , and health in school-aged children and youth , and 2 ) make recommendations based on the findings .