The objectives are to test the acute effects of different bagels containing pulse ingredients on: 1) aerobic endurance and substrate oxidation during exercise 2) response of blood glucose, insulin and appetite to an aerobic exercise session, and 3) food intake two hours following the exercise session. We hypothesize that consumption of bagels containing pulse ingredients 60 minutes before exercise will increase aerobic endurance (lower oxygen consumption), decrease carbohydrate oxidation (greater respiratory quotient), and a reduction in lactate production during compared to the same exercise session following the ingestion of a non-pulse food. We also hypothesize that consumption of bagels containing pulse ingredients will lead to lower blood glucose, insulin, appetite and food intake, suggesting lower calorie compensation, following a 60-minute aerobic exercise session compared to the same exercise session following the ingestion of a non-pulse food.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
OTHER
Masking
TRIPLE
Enrollment
30
Richardson Centre for Functional Foods and Nutraceuticals, University of Manitoba
Winnipeg, Manitoba, Canada
Plasma Glucose and Insulin Concentrations
Measured in blood using intravenous catheter. Glucose will be determined by automated methods using Abbot Spectrum CCX Analyzer, and Insulin will be measured by commercially available RIA kits
Time frame: 0-240
Food Intake
Ad-libitum meal
Time frame: 120 min
Subjective Appetite
Motivation-to-eat VAS questionnaire
Time frame: 0-240 min
Exercise intensity
Oxygen consumption measured during exercise at 3 time points
Time frame: 60-120 min
Palatability
Measured by VAS questionnaire
Time frame: 5 and 260 min
Physical comfort
Measured by VAS questionnaire
Time frame: 0-240 min
Energy/fatigue
Measured by VAS questionnaire
Time frame: 0 - 240 min
Heart rate
To monitor exercise intensity and give a measure of fatigue (cardiovascular drift)
Time frame: 60-120 min
Lactate concentration
Measured before, during, and exercise exercise at 3 time points
Time frame: 60-120 min
Substrate Oxidation
Respiratory quotient measured during exercise at 3 time points
Time frame: 60-120 min
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