Influence from parents and friends on adolescents' self-reported level of leisure-time physical activity was examined through measures of (a) perceived leisure-time physical activity of parents and best friend, (b) perceived direct support for physical activity from parents and friends, (c) direct help from parents in exercising vigorously, and (d) perceived value of physical activity of parents and friends. The present analysis included 904 students in western Norway (M age 13.3 years, SD 0.3) who took part in a health behavior survey, which included questions regarding physical activity. Students completed a confidential questionnaire at school. All four measures of influence were positively related to students' activity levels. None of the examined measures was clearly stronger than the other. Parental and peer physical activity level and parental and peer support for physical activity seem to influence the reported physical activity level of the respondents. The findings indicate that, by serving as models and supporters, significant others have an important impact in promoting physical activity in young adolescents.

The aim of this study was to examine whether early and sustained organized youth sport during childhood and adolescence predicts the frequency of leisure-time physical activity (PA) at age 23 years. A 10-year longitudinal study of 630 adolescents was conducted. Data were collected from these participants eight times from the ages of 13 to 23 years and were analyzed by analysis of variance and regression. There was a high degree of consistency in participation in organized youth sport in terms of reporting to be a member of a sports club, especially from age 13 to 16 years. The correlation coefficients tended to be higher among males and decreased over time both in females and males. The age at becoming a member in organized sport and duration of participation in organized youth sports during adolescence predicted 9% of the variance of young adult PA. The correlations were higher in males than in females, but these differences were not significant. Organized youth sports during childhood and adolescence was positively related to frequency of leisure-time PA in young adulthood. Joining organized youth sports at an early age and continuing through adolescence appear to increase the likelihood for a physically active lifestyle in young adulthood.

Associations between psychosomatic symptoms and school-induced stress, and personal and social resources were analyzed among 862 Norwegian adolescents ages 13-15 years participating in the WHO project, "Health Promoting Schools." Stress-related factors were represented by the average of scores of 3-12 items. Both in combined and separate analyses of each psychosomatic symptom, increasing school distress, the most direct measure of stress experience, was associated with increased risk. A similar relationship was found with school alienation, though not significant for all symptoms. Social support from the teacher decreased the risk among girls, whereas social support from other pupils reduced the risk among both genders, but in particular among boys. No consistent associations were seen between psychosomatic complaints and general or school-related self-efficacy or decision control. In some analyses, however, these factors seemed to modify the association with school distress or school alienation.

Levels and changes in self-reported physical activity over a 7-year period were examined to determine tracking and to estimate the proportion of total cohort change attributable to secular trends. A population-based sample of 2,328 men and 2,787 women aged 18-30 years at baseline (52% black and 48% white) from Birmingham, Alabama, Chicago, Illinois, Minneapolis, Minnesota, and Oakland, California, were examined four times between 1985-1986 and 1992-1993. The intraclass correlation for up to four measures was 0.57 for the entire sample, varying between 0.57 for white men and 0.42 for black women, indicating a moderate tendency for tracking. The energy expenditure in physical activity at each examination was greatest in black men and, compared with black men, about 5% less in white men, 30% less in white women, and 50% less in black women. The total cohort decrease in mean physical activity was approximately 30% in each race-sex group. The secular trend accounted for 38% of the total cohort change in black men, 43% in black women, 52% in white men, and 81% in white women. Physical activity declined sharply during the early years of adulthood, partly because of secular trend. Young adults are therefore an important target group for physical activity promotion programs to reverse individual and populationwide declines prior to middle age.

Twenty-three empirical studies published between 1978 and 2000 on nonclinical children raised by lesbian mothers or gay fathers were reviewed (one Belgian/Dutch, one Danish, three British, and 18 North American). Twenty reported on offspring of lesbian mothers, and three on offspring of gay fathers. The studies encompassed a total of 615 offspring (age range 1.5-44 years) of lesbian mothers or gay fathers and 387 controls, who were assessed by psychological tests, questionnaires or interviews. Seven types of outcomes were found to be typical: emotional functioning, sexual preference, stigmatization, gender role behavior, behavioral adjustment, gender identity, and cognitive functioning. Children raised by lesbian mothers or gay fathers did not systematically differ from other children on any of the outcomes. The studies indicate that children raised by lesbian women do not experience adverse outcomes compared with other children. The same holds for children raised by gay men, but more studies should be done.