Consistency in Individual Differences in Energy Intake Following Acute Exercise



Status:Recruiting
Conditions:Obesity Weight Loss
Therapuetic Areas:Endocrinology
Healthy:No
Age Range:18 - 45
Updated:2/8/2015
Start Date:July 2012
Contact:Jessica L Unick, PhD
Email:junick@lifespan.org
Phone:401-793-8966

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The importance of exercise for weight control is well documented; however if exercise
results in an increase in food intake, the beneficial effect of exercise may not be seen.
This study addresses a gap in the current literature and examines why some people eat more
after exercise and why some people eat less and also examines whether these responses are
consistent over time. Participants in this study will be asked to come to our center on 7
different occasions over a 3-4 month period. The first visit will be an assessment visit
where body weight and body composition will be measured, questionnaires will be completed,
and an exercise test will be performed. During the remaining 6 visits (3 pairs of sessions
with visits in each pair separated by 48-96 hours) the procedures will be nearly identical.
Upon arrival at our center, participants will consume a meal replacement, complete a series
of questionnaires and then either rest or walk on a treadmill for 30 minutes (3 days will be
resting and 3 will be exercising). One hour following the exercise/resting session,
individuals will be given access to a buffet of food, unaware that their food intake will be
monitored. All food will be weighed and measured before and after the eating period and the
amount of food consumed after each pair of exercise and resting conditions will be compared
to one another. It is hypothesized that the difference in food intake will be consistent
across pairs of testing sessions. Findings from this study will help us to better understand
the relationship between exercise and food intake and may ultimately lead to future studies
that can address the clinically significant question of why some individuals gain weight and
others lose weight when engaging in exercise training programs. Findings from this study may
also help to develop exercise programs that maximize the beneficial effect of exercise on
body weight.


Inclusion Criteria:

- Age 18-45 years

- BMI between 25.0 and <35.0 kg/m2

- Female

- Sedentary, defined as exercising at a moderate-intensity for less than 60
minutes/week over the past 6 months.

Exclusion Criteria:

- Presence of any condition that would limit one's ability from exercising (i.e.,
orthopedic limitations)

- Recent weight gain or weight loss (± 10 pounds within the past 6 months)

- Currently enrolled in a weight loss program

- History of heart disease or diabetes

- Currently taking any medication that would alter heart rate (e.g., beta blocker) or
metabolism

- Women who are pregnant, planning on becoming pregnant in the next 2 months, or those
pregnant within the past 6 months

- Uncontrolled hypertension (currently taking blood pressure medication or having a
resting systolic blood pressure ≥140/90 mmHg

- Get an average of <6 hours of sleep/night

- Does not currently eat breakfast regularly

- Known food allergies to test foods or states a disliking or unwillingness to eat more
than 25% of the buffet foods.
We found this trial at
1
site
Providence, Rhode Island 02903
?
mi
from
Providence, RI
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