Inclusion Criteria:

• * Age 18 - 74 years old of age
• * Self-reported physical inactivity
• * Objectively determined to be sedentary in baseline
• * Possess at least one risk factor for CVD
• * Report they are in good general health and have never been informed by a clinician that it was not advisable/safe to participate in a low-intensity walking program
• * Owns and can regularly access a smartphone capable of receiving text messages
• * Owns and can regularly access an e-mail account

Exclusion Criteria:

• * \< 18 years old or \> 74 years old
• * Have self-reported poor health, limited mobility and/or have been advised by a clinician not to increase their low-intensity walking
• * Previously diagnosed with a heart attack, stroke, peripheral vascular disease, or received a stent
• * Inability to comply with study protocol during 4 week baseline period
• * Pregnancy
• * Previous diagnosis of a serious mental health condition or psychiatric disorder, such as bipolar disorder or schizophrenia
• * Cognitive impairment