Protein Intake for Aging Muscle Growth
Trial Summary
What is the purpose of this trial?
After the age of \~50, humans start to lose muscle mass at a rate of about 1-3% per year. However, the loss of muscle mass beyond a certain point can make it increasingly difficult to perform activities of daily living such as rising from a chair, going up and downstairs, carrying groceries, etc. A reason why muscle mass is lost with age is that skeletal muscles become less sensitive to the growth-promoting effects of physical activity and protein ingestion. This loss of sensitivity can be overcome by consuming larger amounts of protein; however, many older adults have difficulties simply consuming greater amounts of protein from whole-food sources. Therefore, the research in this study aims to investigate how different amounts and types of protein, of either a 100%-plant-based or Lacto-vegetarian (plant-based plus dairy) protein sources, affect muscle growth. This information will be important when providing information to older adults about the amount and type of protein that should be consumed by older adults to help prevent the loss of muscle mass that typically occurs with advancing age.
Research Team
Stuart Phillips, PhD
Principal Investigator
McMaster University, Department of Kinesiology
Eligibility Criteria
This trial is for men and women aged 65-80, in good health with a BMI of 20-35. Participants must be non-smokers, able to consent, and not use walking aids or have certain medical conditions like recent cancer (except some types), clotting disorders, severe illnesses affecting the study's integrity or taking specific supplements or steroids.Inclusion Criteria
Exclusion Criteria
Treatment Details
Interventions
- Protein quantity and quality
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Who Is Running the Clinical Trial?
McMaster University
Lead Sponsor
Dairy Farmers of Canada
Collaborator
National Dairy Council
Collaborator