This subproject is one of many research subprojects utilizing theresources provided by a Center grant funded by NIH/NCRR. The subproject andinvestigator (PI) may have received primary funding from another NIH source,and thus could be represented in other CRISP entries. The institution listed isfor the Center, which is not necessarily the institution for the investigator.The long-term goals are two-fold: 1) to positively influence the development of and risk for overweight/obesity through increased participation in physical activity (PA) in American Indian schoolchildren using a school community-based participatory research approach (CBPR); and 2) to evaluate the effectiveness of an internet-delivered PA behavior modification program on PA levels, cardiometabolic disease risk factors, and psychosocial/behavioral variables in middle-aged overweight/obese adults residing in rural communities. Goal 1 A CBPR approach was used to build and implement a web-based PA tracking tool (pedometer measured steps or daily minutes) in an American Indian school district. Repeated longitudinal measurement of select Youth Risk Behavior Survey items and body mass index are made in conjunction with implementation and modification of a culturally attentive school-developed PA intervention. The web-based tool is currently being implemented in a second larger rural school community using a similar CBPR approach. Goal 2 PA and cardiometabolic disease risk factor efficacy testing (randomized control trial; RCT) of a commercially available, internet-delivered, theory-based, physical activity behavior change program has recently been completed. Findings suggest strong short-term outcomes for PA levels and central adiposity in overweight/obese adults but significant PA relapse at one-year. Improvements in central adiposity were maintained at one year. Evidence suggests that longer-term efficacy may be enhanced through: 1) greater internet interactivity and engaging content; and 2) a tapered post-intervention weaning period. Recruitment for an effectiveness trial implementing these evidence-based modifications to the internet-delivered PA intervention is currently underway, and measures will occur immediately post-intervention and at one year.
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