Interval exercise involves short bouts of high intensity exercise interspersed with periods of lower intensity exercise. The benefit is that a shorter total duration of exercise may be required to achieve cardiovascular benefits similar to or even superior to traditional longer bouts of steady state endurance exercise. However how this type of exercise affects appetite and energy intake, particularly in overweight and obese females is not well known. This study involves two trials of exercise, one at high intensity and one at low intensity, followed by a buffet lunch, in overweight and obese females.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
NONE
Enrollment
11
high intensity exercise = 15 x 60 s sprints at 85% velocity of VO2max (vVO2max) with 60 s walking at 20% vVO2max or moderate intensity exercise = walking at 60% vVO2max
Human Physiology Lab
Scranton, Pennsylvania, United States
Change in energy expenditure
caloric expenditure measured via indirect calorimetry
Time frame: immediately pre-breakfast, immediately pre-exercise, during exercise, and immediately post-exercise.
Change in energy intake
measured via standardized lunch
Time frame: immediately post exercise
Change in appetite
measured via circulating hormones leptin and acylated ghrelin
Time frame: immediately pre-breakfast, immediately post-breakfast, immediately post-exercise and immediately pre-lunch
Change in subjective hunger
via visual analogue scale 100 mm, higher scores indicate greater hunger
Time frame: baseline, immediately pre-exercise, immediately post-exercise, immediately pre-lunch, and immediately post-lunch
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