Practicing Restorative Yoga or Stretching for the Metabolic Syndrome (PRYSMS)

实验性的：Restorative yoga intervention

行为的：Restorative yoga

Group yoga sessions: Participants will attend 90 minute yoga group classes for 48 weeks: twice a week for 6 weeks, then once weekly during weeks 7 to 12, then every other week for weeks 13 - 24, and once a month for 6 months. We plan a progressive series of classes, with a subset of poses for each class and then selecting individual poses to focus on in each class.

Home yoga practice: Participants will be given a video disk (DVD) of the yoga postures at the start of the yoga intervention practice. We will also provide the yoga participants with a written manual with pictures and descriptions of each posture that they will be taught in the group sessions. The participants will be asked to practice the postures taught during their group sessions at home at least three times a week with the assistance of the DVD and manual. Each participant will be given a set of yoga props for their use at home. We will ask all participants to keep a log of their home practice sessions

有源比较器：伸展组

行为的：Stretching

Group classes: Participants will attend 90 minute group stretching classes for 48 weeks: twice a week for 6 weeks, then once weekly during weeks 7 to 12, then every other week for weeks 13 - 24, and once a month for 6 months. The stretches will address all body parts, including cervical, upper extremity, thoracic, lumbar, pelvic, and lower extremity musculature.

Home stretching practice: Each participant will receive a written manual with pictures and descriptions of each stretch that they will be learning in group sessions and a DVD with instruction on each of the stretches. The participants will be asked to practice the stretches taught during their group sessions at home at least three times a week with the assistance of the DVD and manual. Each participant will be given stretching supplies. We will ask all participants to keep a log of their home practice sessions.

visceral adiposity by abdominal CT scan

systolic blood pressure, fasting triglycerides, and fasting insulin levels (co-primary outcomes); change in glucose tolerance, HbA1c levels, high density lipoprotein (HDL) cholesterol, and quality of life (secondary outcomes).