NCT03839628

Translational Control of Anabolic Resistance in Aging Muscle

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 9 (actual)
• Sponsor: University of Utah · Academic / Other
• Sex: All
• Age: 60 Years – 85 Years
• Healthy volunteers: Accepted

Summary

This is an interventional study enrolling older individuals aged 60-85y to observe changes during physical inactivity. This study is investigating the relation between short-term physical inactivity and the impact of muscle health and function. The enrollment goal is 8 participants. The study will occur over the course of a month where participants will undergo testing before and after a reduction in physically activity levels. There will be a screening event collecting baseline data, two body composition scans, muscle function and oral glucose tolerance tests and a metabolic study before and after a 2-week period of inactivity. Each metabolic study will entail three-muscle biopsies: one before and 2 after the ingestion of leucine.

Detailed description

Pre-testing- The baseline evaluation will assess muscle function and strength, and an oral glucose tolerance test. After the baseline visit, participants will be provided with a step activity monitor to track their level of activity. This will provide a baseline of the participant's normal level of physical activity so an accurate level of 75% activity reduction can be determined. A 3-day daily dietary diary will be provided for the participant to self-report prior to the experiment, as well. Day 1- After the participant completes their normal activity log and dietary diary, they will be asked to return to the research center for a body composition scan and a metabolic study. The metabolic study will involve blood sampling from an arm vein and muscle biopsies from the thigh before and after a leucine drink. 2-week period of inactivity- After the metabolic study, the participant will return home and maintain a reduced level of activity (75% reduction) for a two-week period. During this time, the participant will receive phone calls from research personnel in order to maintain adherence to the intervention. Day 14- After the 2-week reduced activity period, the participant will return to the research center to receive a body composition scan and undergo a metabolic study identical to 'Day 1'. Post-testing- After Day 14, the participant will be asked to return once again to the research center for a oral glucose tolerance test and the exercise lab for muscle function testing.

Conditions

• Physical Inactivity

Interventions

Type	Name	Description
OTHER	Reduced Physical Activity	Participants will reduce their level of physical activity for 2-weeks as defined as approximately 75% reduction from their baseline level of physical activity.

Timeline

• Start date: 2019-03-05
• Primary completion: 2019-12-17
• Completion: 2019-12-17
• First posted: 2019-02-15
• Last updated: 2022-06-22
• Results posted: 2022-06-02

Locations

1 site across 1 country: United States