In this study, participants will complete two or three in-person visits where they answer surveys and walk for six minutes. After that, they will be placed into one of two groups. One group will start the exercise and nutrition program right away, and the other group will start the program later. The program lasts for twelve weeks. During this time, there will be classes three times each week that last one hour. There will also be a nutrition session every other week. Participants do not need to attend every session, but they are asked to come to at least two thirds of the classes.