This study examinedchanges inphysicalactivity andperceivedexercise benefits, barriers, andbenefit-to-barrierdifferencesinmothersanddaughterswhopartidpatedin 12-week home-based (HB) and university-based (UB) physical activity interventions. Two (group) by two (time) repeatedmeasuresANOVAsandeffectsizesshowedanincrease inphysicalactivity inbothgroups. Mothersinbothgroupsreportedasignijicantdecreaseinexercisebarriers (p_=. 01, ES=. 41). Exercise benefitsandbarriersdidnotchangejordaughters, nordidexercisebenefitschangeformothers. These two interventions were successjulatincreasingphysicalactivity, but changes in EBBS scales differed by age and point in time measures were taken. This information can be used to plan better interventions for^ rls and women.

A physically active lifestyle has many benefits,-Zjunduding reduced risk of coronary heart disease, hypertension, ohesity, and osteoporosis; psychological benefits include reduced stress and depression and increased emotional well-being, energy level, selfconfidence, and satisfaction with social activities (USDHHS, 2000). Despite the well-documented health benefits of physical activity, only 65% of high school youth and 23% of adults engage in vigorous physical activity that promotes cardiorespiratory fitness (eg, 3 or more days per week for 20 minutes or more per session). Additionally, only 25.5% of high school youth and 15% of adults engage in healthenhancing moderate physical activity (eg, at least 30 minutes on 5 or more days per week)(USDHHS, 2000).