Table 1:

Eligibility criteria for study participation

Inclusion criteria
Age	21–65 years
Elevated or high BP	Resting systolic 120–159 mmHg or diastolic 80–99 mmHg
Inactive lifestyle	Engages in less than 150 minutes per week of moderate + 2x vigorous intensity physical activity by self-report
Desk worker	Currently perform deskwork for ≥ 20 hours per week
Office location	Employment within an approximate 25-mile radius
Stable employment	≥ 3 months in current job, plan to be in current job for the next 3 months
Supervisor approval	Supervisor permission to join the intervention on provided consent form
Cell phone	Possession of a cellular phone able to receive text messages
Exclusion criteria
BP indicating need for medication	Resting systolic BP ≥ 160 mmHg or diastolic BP ≥ 100 mmHg
Medications	Antihypertensive or glucose-controlling medications
Comorbid conditions	Conditions that would limit ability to reduce SB (e.g., musculoskeletal condition, current chemotherapy)
Cardiovascular disease	History of ischemic heart disease, chronic heart failure, stroke, or chronic kidney disease
No medical provider clearance	Unable to provide written consent from primary care provider or physician to participate
Other exclusions	Current use of sit-stand or standing desk, SB prompting device, enrollment in a weight loss or exercise study program, recent (< 1 year) or planned bariatric surgery
Pregnancy status	Currently pregnant or pregnant in the last 6 months; breastfeeding currently or in the last 3 months
Inadequate availability	Plans to be away from desk for an extended period (>1 week) during the study period (e.g., for a prolonged vacation or planned surgery)