Many athletes anecdotally report modifying their nutritional intake before competition in order to avoid gut problems, but no studies have evaluated whether emotional state impacts tolerance to pre-exercise feeding. Therefore, this study will use movie clips (stressful, horror, and funny/amusing) to induce different mood states and emotions, which will be followed by ingestion of food before endurance running on a treadmill. In addition, metabolic and physiologic responses to mood induction will be evaluated.
Aged 18 to 55 years
Able to run for 30 min at a moderate-to-vigorous intensity without stopping
No diagnosis or signs/symptoms of cardiovascular disease (CVD) or metabolic disorders
Currently physically active (at least 3 days/week of exercise at a moderate or higher intensity)
Aged <18 or >55 years
Unable to run for 30 min at a moderate-to-vigorous intensity without stopping
A diagnosis or signs/symptoms of CVD or metabolic disorders
Currently physically inactive (< 3 days/week of exercise at a moderate or higher intensity)
Parallel
Funny/Amusing Video Clips
Other interventionParticipants watch 5-7 minutes of video clips that are funny/amusing in nature
Horror/Scary Video Clips
Other interventionParticipants watch 5-7 minutes of video clips that are scary in nature
Thrilling/Suspenseful Video Clips
Other interventionParticipants watch 5-7 minutes of video clips that are thrilling/suspenseful in nature
Total exercise gastrointestinal symptom burden
The severity of several gastrointestinal symptoms will be assessed on a validated 0-10 scale. Ratings will be collected every 5 minutes during a 30-minute treadmill jogging/running test. Scores from every 5-minute collection will be summed to calculate total GI symptom scores.
Change in emotion ratings
Anxiety, fear, happiness, amusement, disgust, sadness, and anger on a 0-9 Likert scale. Emotions will be assessed before watching video clips and immediately after watching video clips.
Change over time in exercise heart rate
Heart rate will be measured with a chest-strap (Polar) monitor.
Substrate use
Carbohydrate and fat oxidation rates will be estimated from the volumes of oxygen consumption and carbon dioxide production during exercise
Feeling Scale
The Feeling Scale is a bipolar numerical rating scale ranging from -5 to +5, with descriptors of "very bad" at -5, "neutral" at 0, and "very good" at +5.
Fatigue Scale
The Fatigue Scale is Likert-type scale that ranges from 0 (Not Fatigued at All) to 10 (Total Fatigue).
Click on the lead sponsor to view all of their trials.
