- Male or female; age 35-65 y; BMI 25-38 kg∙m-2; weight stable (± 3 kg) 3 months pre-study; no acute illness; not diabetic; not pregnant or lactating; not currently (or within 3 months pre-study) following an exercise or weight loss program; non-smoking; not lactose intolerant; natural waist circumference ≥ 102 cm for men and ≥ 88 cm for women; fasting glucose < 110 mg/dL, systolic and diastolic blood pressures < 140/90 mmHg; serum total cholesterol < 260 mg/dL; LDL-cholesterol < 160 mg/dL; triacylglycerol < 400 mg/dL; PSQI score ≥ 5; and clinically normal serum albumin and pre-albumin concentrations. In addition, subjects who have been diagnosed by their doctor with moderate to severe sleep apnea or insomnia will be excluded during screening.