Sprint to Fitness: Effect of Outcome Expectations on Responses to Interval Exercise Training

Effect of Outcome Expectations on Psychological and Physiological Responses to Interval Exercise Training

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.

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.

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