Stated willingness to comply with all study procedures and availability for the duration of the study,

Primiparous, singleton pregnancy,

Between 3+1 and 6+1 months postpartum,

Has a body mass index \>25 kg/m2,

Physically inactive, defined as self-reporting \<150 minutes/week of moderate-to-vigorous intensity physical activity,

Endorse \>1 indicator of poor sleep health based on the RU\_SATED questionnaire, and

Has smartphone and home Internet access

Sleep Goal-focused Online Access to Lifestyle Support