Inclusion Criteria:

• HIV-infected volunteers must have dyslipidemia (fasting serum LDL-cholesterol >100mg/dL, or
• triglycerides >200mg/dL, or
• HDL-cholesterol <40mg/dL (men) or <50mg/dL (women), or
• impaired glucose tolerance (fasting blood glucose 100-140mg/dL or
• fasting insulin 13-45µU/mL or 2hr glucose during the oGTT 140-200mg/dL),or
• central adiposity (waist circumference >102 cm (40inches in men) or >88cm (35inches in women)
• The purpose is to identify and enroll participants with a clear proatherogenic lipid profile
• increased CVD risk
• abdominal adiposity, and fasting glucose intolerance or insulin resistance
• but not type 2 diabetics who have normalized their blood sugars using glucose-lowering agents. If a type 2 diabetic uses a glucose-lowering medication, but they are still insulin resistant/glucose intolerant (by above criteria), they are eligible to participate, because we are testing the added benefits of yoga therapy on a defined dysmetabolic syndrome in participants who are stable on the standard-of-care for these metabolic syndromes, and this includes glucose- and lipid-lowering agents
• These criteria must be met, even in volunteers receiving glucose- or lipid-lowering agents, so that we enroll participants who have developed metabolic syndromes that are not normalized by traditional pharmacologic approaches
• Volunteers receiving glucose- or lipid-lowering agents who have normalized their lipid, glucose and insulin levels below these defined limits, are not eligible to enroll.

Additional Inclusion Criteria.

• 18-70 years old.
• Plasma HIV RNA <15,000 copies/ml for previous 3months.
• CD4 count >200 c/µL for previous 3 months.
• Stable HIV RNA level and stable CD4 count for at least the past 3 months. Some HIV-infected people can accomplish this while not receiving HAART (eg. long term non-progressors) and will be included. But, most of the participants will be on a HAART regimen that includes either 2 NRTIs + NNRTI, or 2NRTIs + PI, or NRTI+NNRTI+PI

• "Normal" blood chemistries for at least 1 month prior to enrollment:

  • platelet count >30,000/mm3
  • absolute neutrophil count >750/mm3
  • transaminases <5x the upper limit of normal
  • creatinine <3x the upper limit of normal
  • albumin >30g/L

Exclusion Criteria:

• Chronic hepatitis B infection (HB surface antigen positive). Active hepatitis C infection (detectable Hep C RNA). Those who have cleared hepatitis B or C infection are eligible.
• Diabetes [fasting glucose >140 mg/dL, or fasting insulin >45 µU/mL, or 2-hr glucose >200mg/dL].
• History of diabetes mellitus that pre-dates HIV-infection. Medications or agents that regulate glucose or lipid metabolism (e.g., insulin-sensitizers, insulin-secretagogues, HMG-CoA reductase inhibitors ('statins'), fibrates, niacin) are permitted. A large percentage of ACTU subjects and ID Clinic patients receiving RTV-boosted regimens are also receiving lipid-lowering agents. Excluding them might significantly reduce the pool of potential enrollees. The glucose- or lipid-lowering agent and dose must be stable for at least 3 months prior to screening. Additionally, volunteers taking glucose-or lipid-lowering agents must still have dyslipidemia and impaired glucose tolerance criteria (above). If they are taking these agents and have 'normalized' their lipids/lipoproteins and hyperinsulinemia, then they are not eligible
• Gestational diabetes, pregnancy, or nursing mothers. Menstruating women must have a negative urine pregnancy test within 14 days prior to DEXA testing (minor radiation exposure from DEXA). To control for potential metabolic effects of alterations in female hormones during the menstrual cycle, all menstruating women will be tested during the follicular phase.
• Hypogonadism [total testosterone <200ng/dL (men) or <15ng/dL (women)]; thyroid disorder [TSH <0.2 or >12µIU/mL]; hypercortisolemia [morning cortisol >22µg/dL]. Replacement testosterone or thyroid hormones or human growth hormone to normalize abnormal levels is acceptable, as long as treatment has been stable, and blood testosterone, TSH or IGF-1 levels are within the normal range.
• Unwilling or unable to attend supervised yoga sessions 3days/wk provided by Brentwood Center for Health at the Connectcare Clinic. Any condition that might be contraindicated for yoga therapy (disabling neuromuscular or musculoskeletal injury/disorder)
• History of serious cardiovascular disease; MI, unstable angina, heart failure, congenital heart disease, coronary artery disease, resting ST-segment depression >1mm, coronary artery bypass graft, stroke, sinus tachycardia, arrhythmias, premature atrial or ventricular contractions, claudication. Bundle branch block is exclusionary because it limits the interpretability of the resting/exercise ECG. Cardiovascular contraindications to maximal exercise testing
• Anticipated change in anti-HIV medications or other medications that affect metabolism, within the next 4months
• Well-trained athletes (defined as >3 exercise training exposures/week; >30min regimented exercise/exposure maintained for at least the prior 4 weeks)
• Active substance abuse (eg, alcoholism, cocaine, heroin, crack, methamphetamine, phencyclidine)
• Active secondary infection or a significant change in chronic suppressive therapy for an opportunistic infection during 1 month prior to enrollment
• New serious systemic infection during the 3 weeks prior to enrollment
• Recent episode of hyperlactatemia or lactic acidosis, esp. with rapid weight loss
• Chronic renal insufficiency/failure or other comorbid conditions (eg. cancer, COPD) that alter metabolism
• Pancreatitis, celiac disease, or cirrhosis
• Inadequate macronutrient or energy intake, or malabsorptive disorder as determined by the research dietician
• Dementia or any condition that would prevent voluntary informed consent or compliance
• Other compounds or blinded investigational new drugs that might affect metabolism or confound data interpretation (eg. RU486, interleukin therapy, or cytokine-receptor antagonist)
• Oral glucocorticoid or corticosteroid use within the previous 3 months