Training will be provided in one to one sessions and reinforced at the following visits. Accelerometry data and paper PA diary data collected during the week before the baseline visit will be reviewed with the participant to provide feedback and used for devising a customized plan on increasing light activity. Examples of how to increase light activities within their natural, free-living environment will be provided. For instance, if the majority of their day is spent working at a desk, they will be encouraged to stand and/or walk for 5 minutes for every 25 minutes spent sedentary during weeks 6-12, and 10 minutes of light activity for every 20 minutes spent sedentary for weeks 12-18. Participants will be asked to stand and/or walk during commercial breaks when they are watching television.