Clinical trial NCT03162978: Sprint to Fitness: Effect of Outcome Expectations on Responses to Interval Exercise Training
Official title: Effect of Outcome Expectations on Psychological and Physiological Responses to Interval Exercise Training
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Overweight
Obesity
Keywords: Exercise
behavior economics
Lead sponsor: USDA Grand Forks Human Nutrition Research Center
Sponsor class: FED
First posted: 2017-05-22
Enrollment: 66
Sex: ALL
Minimum age (years): 18
Maximum age (years): 40
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: OTHER

Brief summary: The purpose of this study is to research the effects of exercising at high intensities for short periods of time on exercise tolerance and motivation.

Detailed description: The proposed research will investigate whether adding a treatment component that focuses on positive outcome expectations of a high-intensity interval training (HIIT) intervention produces greater improvements in psychological and physiological study outcomes. This project will yield empirical evidence that will inform how to help Americans meet physical activity guidelines; how to develop exercise programs that are more likely to promote exercise as a habit; and maintenance of health and a healthy body weight.

Eligibility criteria: Inclusion Criteria:

* Body Mass Index of 25-35 kg/m2
* Sedentary (not regularly engaging in exercise more than once per week)
* Weight stable (have not lost or gained over 10 pounds of body weight in the past 3 months)

Exclusion Criteria:

* Taking any medications that affect energy expenditure or treat high blood pressure
* Tobacco use
* Pregnant or breastfeeding or plan to become pregnant in the next 3 months
* Have any medical conditions that prevent subject from safely exercising (e.g., orthopedic injuries, cardiovascular, liver, endocrine, or pulmonary diseases)
* Resting systolic blood pressure ≥ 140 mmHg
* Resting diastolic blood pressure ≥ 90 mmHg
* Non-fasting plasma glucose of ≥ 200 mg/dl

Primary outcomes:
measure: Change in relative reinforcing value (RRV) of physical activity
timeFrame: Week 0, Week 6, Week 10
measure: Changes in preference for intense physical activity and tolerance for exercise discomfort
timeFrame: Week 0, Week 6, Week 10
Secondary outcomes:
measure: Change in minutes of physical activity, as assessed by activity tracker
timeFrame: Week 0, Week 6, Week 10
measure: Changes in quadriceps and hamstring (thigh muscle) strength assessed separately on each leg
timeFrame: Week 0, Week 6, Week 10
measure: Changes in aerobic fitness, as assessed using the Standardized Exponential Exercise Protocol (STEEP)
timeFrame: Week 0, Week 6, Week 10
measure: Changes in anaerobic power, as during a Wingate anaerobic power exercise test
timeFrame: Week 0, Week 6, Week 10
measure: Changes in fat mass as assessed by dual energy x-ray absorptiometry (DXA) scans
timeFrame: Week 0, Week 6, Week 10
measure: Changes in fat-free lean mass as assessed by DXA scans
timeFrame: Week 0, Week 6, Week 10
measure: Changes in tolerance for physical pain and discomfort
timeFrame: Week 0, Week 6, Week 10
measure: Changes in perceived support for physical activity from friends and family members
timeFrame: Week 0, Week 6, Week 10
measure: Changes in perceptions of how much exercise satisfies autonomy, relatedness, and competence needs
timeFrame: Week 0, Week 6, Week 10
measure: Changes in intrinsic, external, interrogated, identified, introjected and amotivation for physical activity
timeFrame: Week 0, Week 6, Week 10
measure: Changes in how enjoyable physical activity is perceived to be
timeFrame: Week 0, Week 6, Week 10
measure: Changes in perceived effort expended during exercise
timeFrame: Week 0, Week 6, Week 10
measure: Changes in perceived pain/discomfort during exercise
timeFrame: Week 0, Week 6, Week 10
measure: Changes in perceived ability to continue exercise long-term
timeFrame: Week 0, Week 6, Week 10
measure: Changes in perceived ability to stick to an exercise routine
timeFrame: Week 0, Week 6, Week 10
Other outcomes:
Locations:
city: Grand Forks
country: United States
facility: USDA Grand Forks Human Nutrition Research Center
state: North Dakota
Study officials:
affiliation: USDA Grand Forks Human Nutrition Research Center
name: James N Roemmich, PhD
role: PRINCIPAL_INVESTIGATOR
References: