“…1 In 11 of the 13 studies reviewed, the principal reason given for not being physically active was a lack of time for exercise [5-7, 9, 20-22, 24, 25, 27]. Care giving responsibility-including caring for children, elderly parents, or other family members-was also a prevalent barrier in studies that focused on women [4,6,7,25]. Lack of motivation [5,21,22,24] and lack of energy [6,7,20] were also frequently ranked as principle barriers.…”