Title: Comparative Effectiveness of Pedometer-Based Walking Interventions: WalkMore

Brief Summary

Detailed Description

Baseline assessment, then a three month intervention or control condition, followed by another assessment at the end of the study. Participants will be screened for blood pressure, height, weight, and the distance around the waist. Participants who meet the eligibility criteria will be given a pedometer to log steps for one week. During visit 2, participants will return the pedometer, and are able to self-monitor appropriately, they will be given an accelerometer to wear for one week. Pedometry: Participants will wear a small device which will measure the amount of steps accumulated for 7 days during the first week of the run-in period and again at follow-up (Control group will not perform follow-up pedometry). Accelerometry: Participants will be asked to wear a small device similar to a pedometer attached to a belt at the hip to measure physical activity levels for 7 days during the second week of the run-in period and again at the week prior to follow-up. Assessment Visits (Baseline and 3 Months): Blood pressure, brachial ultrasound (measure of the health of the artery), blood draw (fasting blood glucose and insulin), height, body weight, and waist measurement will be measured at the beginning of the main study and again after the 3-month period. Brachial Artery Ultrasound: An ultrasound is a procedure that uses sound waves to create a picture. The brachial artery ultrasound measures how elastic the arteries are and the thickness of the lining of the major blood vessel in the upper arm (the brachial artery). After resting for fifteen minutes, an ultrasound probe will be placed over the brachial artery in the elbow area on the non-dominant arm. A blood pressure cuff will be inflated around the forearm for five minutes to reduce blood flow. When the cuff is deflated, the ultrasound will be continued for five more minutes to observe the blood flowing back into the arm. Blood Draw: A fasting blood draw will occur to obtain fasting glucose and insulin. Walking Gait: Participants will walk across a 16 foot computerized floor mat, which will measure walking speed. After a couple practice walks, the participant will be asked to walk 2 times across the mat at 6 different self-selected paces: very slow, slow, preferred/normal, fast, very fast, and as quickly as possible (without running). The participant will be able to rest as needed. The computerized mat will measure walking speed and other elements associated with the pace at which the participant walks.

Primary Outcomes

Secondary Outcomes

• Resting diastolic blood pressure(3 Months)
• Accelerometry(3 Months)
• Brachial Ultrasound(3 Months)
• Waist Circumference(3 Months)
• Walking gait(3 Months)