Exercise Trial
In the exercise trial, participants consumed the standard meal described
above and then waited for 15 minutes, during which time they sat
quietly. Following this time period, participants completed a 15-minute
session of treadmill walking at a self-selected pace. No instruction was
given to participants regarding their walking pace or intensity.
Although exercise was based on self-selected pace, intensity was
monitored via heart rate and RPE. Intensity of exercise would be based
upon subject’s age predicted max HR using the equation 208-(.7*age) with
moderate intensity exercise occurring at 64-75 percent of maximum HR
according to the American College of Sports Medicine (1).
Each three minutes throughout the exercise session participants were
asked to provide their rating of perceived exertion (Borg 6-20 scale) by
verbally indicating their rating shown on the chart provided. Heart rate
and blood pressure were recorded every five minutes during the exercise
session. Blood glucose readings were taken at baseline (pre-meal) and at
30, 60, 90, and 120 minutes.