Inclusion Criteria:  >55 years of age Able to provide transportation to resistance training sessions and data collection days Able to read and write in English Have not adhered to a progressive resistance training program in the past three months Able to ambulate without assistance Willingness to provide informed consent and participate in the intervention Do not have a comorbidity that could be exacerbated by study protocol, such as severe cardiovascular disease, type I or type II diabetes, renal failure, liver disorders, or thyroid disease OR can provide explicit written consent from a primary care physician indicating that they can participate in this study.  Exclusion Criteria:  Currently consuming an agent known to be confounding to skeletal muscle adaptation, such supplements that include, but are not limited to creatine monohydrate, growth hormone, or testosterone replacement therapy Currently undergoing cancer treatment Used whey protein supplements within the past three months Pre-menopausal status for women