Changes in taste and odor sensitivities during repeated bicycle ergometer exercises

Area of Science:

• Exercise Physiology
• Sensory Science
• Nutritional Science

Background:

• Effective nutritional support is crucial for optimal exercise performance.
• Understanding how exercise impacts taste and olfaction is vital for sports nutrition.
• Previous research on exercise effects on sensory perception remains inconclusive.

Purpose of the Study:

• To investigate the impact of repeated endurance exercise on taste and odor sensitivities.
• To determine if prolonged exercise alters perception of taste intensity and preference.
• To assess changes in odor intensity and preference following exercise sessions.

Main Methods:

• Twenty women completed four 50-minute cycling exercise segments interspersed with 10-minute sensory tests.
• Taste sensitivity was evaluated using varying concentrations of an isotonic beverage.
• Odor perception was assessed using four distinct food odorants, with participants rating intensity and preference.

Main Results:

• Physical fatigue significantly increased with successive exercise segments.
• Taste intensity and preference for higher beverage concentrations increased with exercise duration.
• No significant changes were observed in perceived odor intensity or odor preference.

Conclusions:

• Prolonged endurance exercise may enhance taste sensitivity, particularly for more concentrated solutions.
• Odor sensitivity and preference appear to be less affected by repeated exercise compared to taste.
• Findings suggest differential impacts of exercise on gustatory and olfactory senses.