This study evaluates the effects of two types of resistance exercise training (higher-repetition, lower load vs lower-repetition, higher load vs control) on regional and local measures of arterial stiffness in trained young men.

Inclusion Criteria:

• Male
• Aged 18-30 years old
• Non-obese (Body mass index less than 30 kg/m2)
• Non-smoker
• Healthy based on questionnaire responses
• Resistance trained (Resistance training > 2 times per week for 2 years, minimum 1 lower body exercise session per week)

Exclusion Criteria:

• Allergies to milk proteins (whey or casein)
• Any acute or chronic illness, cardiac, pulmonary, liver, or kidney abnormalities, uncontrolled hypertension, insulin- or non-insulin dependent diabetes or other metabolic disorders-all ascertained through medical history screening questionnaires
• Arthritic conditions
• Individuals who consume any analgesic or anti-inflammatory drug(s), prescription or non- prescription, chronically will be excluded
• A history of neuromuscular problems
• Individuals on any medications known to affect protein metabolism (i.e. corticosteroids, non-steroidal anti-inflammatories, or prescription strength acne medications).