General findings that have consistently been demonstrated in the literature are that activity tends to decreased during pregnancy from pre-pregnancy levels and that activity in the third trimester is less than in the first trimester. In non-pregnant patients, increase in physical activity and exercise has been associated with improved mood and self-esteem. Although the data in pregnancy is limited, available studies do suggest that inactivity is associated with worse mood. Regular physical activity is not detrimental in low-risk patients and in fact may be beneficial.