The purpose of this study is to determine how chronic inflammation influences skeletal muscle protein metabolism and metabolic function in humans. The investigators will evaluate acute responsiveness to a single bout of exercise in men and women who are either lean or overweight/obese. The investigators will explore the relationship between circulating inflammatory markers and anabolic, proteomic, and transcriptional responses to acute exercise. The investigators will measure skeletal muscle protein synthesis in the postabsorptive state and in response to a single bout of exercise.

Inclusion Criteria:

• Age 30-55 years
• BMI 19-45 kg/m2

Exclusion Criteria:

• Anemia (female subjects hemoglobin of <11 g/dl and male subjects hemoglobin <12 g/dl)
• Active coronary artery disease or history of unstable macrovascular disease (unstable angina, myocardial infarction, stroke, and revascularization of coronary, peripheral or carotid artery within 3 months of recruitment)
• Renal insufficiency/failure (serum creatinine > 1.5mg/dl)
• Oral warfarin group medications or history of blood clotting disorders.
• Pregnancy or breastfeeding
• Alcohol consumption greater than 2 glasses/day or other substance abuse
• Untreated or uncontrolled thyroid disorders
• Debilitating chronic disease (at the discretion of the investigators)

Men and women between the ages of 30-55 years will be recruited for this study. Fifteen individuals will be lean, defined as a body mass index (BMI) between 19 and 24 kg/m2. Thirty individuals will be overweight/obese, defined as a BMI between 25 and 45 kg/m2.