Effects of Different Sports Supplements on Metabolism and Perceptual Responses During Distance Running

Effects of Different Sports Supplements on Metabolism and Perceptual Responses During Distance Running

Several previous studies have shown that repeatedly ingesting carbohydrate supplements during exercise training sessions, over a period of days and weeks, can gradually increase carbohydrate oxidation and reduce gut discomfort during exercise. However, repeatedly ingesting large amounts of carbohydrate during training sessions can be burdensome and can cause gut distress. Thus, it would be advantageous if the same long-term benefits could be realized from consuming these carbohydrate supplements at rest instead of specifically during training sessions. Therefore, the goal of this study is to examine whether repeatedly ingesting a carbohydrate-rich beverage at rest over a 5-day period alters metabolism and gut symptoms while ingesting carbohydrate during exercise.

Inclusion Criteria:

• Be currently running ≥15 miles per week
• Have completed at least one run >60 minutes over the past month
• Have completed one or more marathons within the past year

Exclusion Criteria:

• Overt cardiovascular disease or metabolic disorder
• Adverse symptoms (e.g., unusual shortness of breath, dizziness, chest pain) with exercise
• Allergies/intolerances to any of the ingredients in the beverages