Despite substantial evidence of the linkage between stress and weight
change, previous studies have not considered how stress trajectories that begin
in childhood and fluctuate throughout adulthood may work together to have
long-term consequences for weight change. Working from a stress and life course
perspective, we investigate the linkages between childhood stress, adulthood
stress and trajectories of change in body mass (i.e., Body Mass Index, BMI) over
time, with attention to possible gender variation in these processes. Data are
drawn from a national longitudinal survey of the Americans’ Changing
Lives (N=3,617). Results from growth curve analyses suggest
that both women and men who experienced higher levels of childhood stress also
report higher levels of stress in adulthood. At the beginning of the study
period, higher levels of adulthood stress are related to greater BMI for women
but not men. Moreover, women who experienced higher levels of childhood stress
gained weight more rapidly throughout the 15-year study period than did women
who experienced less childhood stress, but neither childhood nor adulthood
stress significantly modified men’s BMI trajectories. These findings add
to our understanding of how childhood stress—a more important driver of
long-term BMI increase than adult stress—reverberates throughout the
life course to foster cumulative disadvantage in body mass, and how such
processes differ for men and women. Results highlight the importance of
considering sex-specific social contexts of early childhood in order to design
effective clinical programs that prevent or treat overweight and obesity later
in life.