Exercise condition affects hedonic responses to sodium in a sport drink

Area of Science:

• Sports Science
• Human Physiology
• Sensory Science

Background:

• Optimizing fluid and electrolyte intake is crucial for athletic performance.
• Understanding the impact of sodium concentration on beverage palatability during exercise is important for hydration strategies.

Purpose of the Study:

• To investigate the dose-response effects of varying sodium content in carbohydrate drinks on sensory perception and palatability in athletes.
• To examine how these effects differ between sedentary, pre-exercise, and during-exercise conditions.

Main Methods:

• Fifty-five triathletes and runners consumed 6% carbohydrate drinks with sodium concentrations ranging from 0 to 60 mmol/l.
• Sensory perception and palatability were assessed in sedentary, pre-exercise, and post-exercise (60 and 120 min) conditions.
• Statistical analysis was used to determine significant differences in perception and intake.

Main Results:

• Significant intensity discrimination was found across most sodium levels, except between 0/18 mmol/l and 30/40 mmol/l.
• Perceived salt intensity did not differ significantly across time points.
• Overall drink acceptability and liking of saltiness were higher for the 60 mmol/l sodium drink during and after exercise compared to sedentary conditions.

Conclusions:

• The exercise context, rather than physiological state alone, may enhance the palatability of higher sodium drinks.
• Sensory measures were more sensitive to sodium concentration effects than fluid intake.
• Liking of saltiness, but not thirst or sweat loss, was related to fluid intake in athletes.