This study is designed to test the effects of six 5 minute microbursts of physical activity spread across the day as compared to either a sedentary control condition or a single 30 minute bout of moderate intensity physical activity on cognitive function, self-reported energy levels, aspects of eating behavior and measures of metabolic health. The primary hypotheses are:

1. Hourly 5 minute bouts of moderate intensity exercise during the day will increase afternoon cognitive function as compared to a no exercise condition.
2. Hourly 5 minute bouts of moderate intensity exercise during the day will increase afternoon cognitive function more than a single 30 minute AM bout.

Secondary exploratory hypotheses include

1. Hourly 5 minute bouts of moderate intensity exercise during the day will increase self-reported energy levels, reduce orexigenic appetitive measures and improve measures of metabolic health as compared to a no exercise condition.
2. Hourly 5 minute bouts of moderate intensity exercise during the day will increase self-reported energy levels, reduce orexigenic appetitive measures and improve measures of metabolic health more than a single 30 minute AM bout.

Inclusion Criteria:

1. All ethnic groups and both genders
2. Age: Lower age limit: 19 years; Upper age limit: 45 years
3. Body-mass Index: Lower BMI limit: 18.5 kg/m2; Upper BMI limit: 29.9 kg/m2
4. 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:

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

This clinical trial is a small study (n=30) that received limited funding from Johnson and Johnson Company, a non-public funding company. Our data sharing plan will follow the NIH guidelines for data sharing plans of small clinical trials and not unique set of data that could benefit the community (http://grants.nih.gov/grants/policy/data\_sharing/data\_sharing\_faqs.htm#901). Following the NIH definition of "the timely release and sharing" to be no later than the acceptance for publication of the main findings from the final data set, final research data will be shared through scientific publications after peer-review.