Inactivity Duration on Lipid Metabolism

Summary

The purpose of the study is to investigate the effect of different periods of physical inactivity on postprandial lipid metabolism in the morning after exercise by measuring plasma triglyceride levels and fat oxidation (burning). The study is a crossover intervention with all healthy participants performing three trials varying in length of physical inactive (12 hours, 24 hours, and 36 hours). All trials include a physical activity control phase (\>10,000 steps/24hr), a physical inactive phase (\<1,000 - 1,500 steps/12hr), a moderate intensity cycling session, and a high-fat tolerance test.

Conditions

• Metabolism

Interventions

BEHAVIORAL

12 hours of physical inactivity

A pedometer will be worn by participants during the whole trial. Steps will be monitored. Participants will be required to reach 10,000 steps per 24 hours for 48 hours, and then limit their steps below 1000 steps. A diet record form, a sleep record, and a step record form will be given to participants to log in their diet, sleep time and steps taken through out the whole trial. Participant will be asks to mimic the diet between trials.

BEHAVIORAL

24 hours of physical inactivity

A pedometer will be worn by participants during the whole trial. Steps will be monitored. Participants will be required to reach 10,000 steps per 24 hours for 48 hours, and then limit their steps below 1,000 - 1,500 steps per 12 hours for 24 hours. A diet record form, a sleep record, and a step record form will be given to participants to log in their diet, sleep time and steps taken through out the whole trial. Participant will be asks to mimic the diet between trials.

BEHAVIORAL

36 hours of physical inactivity

A pedometer will be worn by participants during the whole trial. Steps will be monitored. Participants will be required to reach 10,000 steps per 24 hours for 48 hours, and then limit their steps below 1,000 - 1,500 steps per 12 hours for 36 hours. A diet record form, a sleep record, and a step record form will be given to participants to log in their diet, sleep time and steps taken through out the whole trial. Participant will be asks to mimic the diet between trials.

Sponsors & Collaborators

• University of Texas at Austin

  lead OTHER

Principal Investigators

• Jieting Wang, M.S. · The University of Texas of Austin

Study Design

Allocation

NA

Purpose

BASIC_SCIENCE

Masking

NONE

Model

CROSSOVER

Eligibility

Min Age

18 Years

Max Age

65 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2023-10-01

Primary Completion

2024-05-12

Completion

2024-05-12

Countries

• United States

Study Locations