During the Wave II and III in-home interviews, Add Health collected measures of respondent height and weight. To better understand the social, behavioral and biological linkages in health trajectories as the Add Health cohort ages through adulthood, the Wave IV study design included an expanded set of anthropometric measures as well as several new measures of cardiovascular health. The Wave IV cardiovascular and anthropometric measures were collected in the following order: • Blood pressure cuff size • Systolic blood pressure (SBP, mmHg) • Diastolic blood pressure (DBP, mmHg) • Pulse rate (PR, beats/min) • Height (cm) • Weight (kg) • Waist circumference (cm); In addition, the Add Health Wave IV data set includes the following constructed measures, derived from those listed above: • Blood pressure classification1 • Pulse pressure (mmHg) • Mean arterial pressure (mmHg) • Body mass index (BMI, kg/m2) • BMI classification; This document summarizes the rationale, measurement, equipment, protocol and data cleaning procedures for each of the cardiovascular and anthropometric measures collected at Wave IV. It also documents how constructed variables were derived from the cardiovascular and anthropometric measures collected in the field. Documentation of other Wave IV biological measures, including metabolic, inflammatory, immune and genetic measures, will be provided in separate reports.