Day 1 testing measures include vascular measures (arterial pulse wave velocity, arterial structure, and flow mediated dilation; 30 minutes), cardiac structure and function measures (30 minutes), administration of the demographics and Health Action Process Approach model questionnaire (25 minutes), and a measurement of energy expenditure at different sub-maximal wheeling speeds to calibrate MVPA cut-points (35 minutes) for a total duration of 2 hours. Participants will be given an accelerometer to wear for the 6-day monitoring period (6.1.2) after which they will return for Day 2 testing.