Exercise Snacking and Cardiometabolic Health

Inclusion Criteria: * Age 18-60 years. * Body mass index (BMI) ≥18.5 kg/m². * Insufficiently physically active, defined as generally not meeting current physical activity guidelines for moderate-to-vigorous physical activity. * Able to safely participate in moderate-to-vigorous physical activity as determined by study screening procedures, including completion of the Physical - Activity Readiness Questionnaire (PAR-Q+) and health history review. * Willing and able to provide written informed consent. * Willing to complete all study visits, wear activity monitors, and comply with study procedures. Exclusion Criteria: * Known cardiovascular, pulmonary, metabolic, neurological, orthopedic, or other medical conditions that would make participation in moderate-to-vigorous physical activity unsafe. * Resting heart rate \>100 beats/minute at screening. * Resting blood pressure \>160/100 mmHg at screening. * Clinically significant electrocardiogram (ECG) abnormalities identified during screening that require medical evaluation. * Current participation in regular structured physical activity that meets or exceeds recommended physical activity guidelines. * Physical limitations or injuries that preclude safe participation in the intervention or fitness testing. * Moderate-to-severe psychological distress or other mental health concerns identified during screening that require referral or would make study participation inappropriate. * Pregnancy or any other condition judged by the investigators to make participation unsafe or interfere with completion of study procedures.