Effect of Frequent Interruptions of Prolonged Sitting on Self-perceived Levels of Energy, Mood, Food Cravings and Cognitive Function

Inclusion criteria

• All ethnic groups and both genders
• Age: Lower age limit: 19 years; Upper age limit: 45 years
• Body-mass Index: Lower BMI limit: 18.5 kg/m2; Upper BMI limit: 29.9 kg/m2
• Willing to adhere to caffeine restrictions of no more than two 16 ounce beverages in the morning of each study day with no caffeine intake after 12:00pm on any of the three study days

Exclusion criteria

• History of cardiovascular disease, including coronary artery disease, congestive heart failure, & unstable angina, or uncontrolled hypertension (>140/90 mm Hg)
• Currently smoking or stopped smoking in the last 6 months
• Medications affecting weight, energy intake, or energy expenditure in the last 6 months
• Use of oral steroids
• History of stroke or seizures, thyroid disease, type 1 or 2 diabetes, Cushing's syndrome, cerebrovascular, renal disease, hepatic disease, arrhythmias
• Cancer requiring treatment in the past 5 years, with the exception of skin cancers other than melanoma
• Infectious diseases: Self-reported HIV positivity or active tuberculosis
• Inability to exercise for more than 30 minutes on a treadmill at moderate intensity
• Currently pregnant, lactating or less than 6 months post-partum
• History of a major psychiatric disorder including schizophrenia, bipolar illness or psychotic depression
• Score of >25 on Beck Depression Inventory
• No recreational drug use including marijuana in the past 1 year