Chocolate aroma boosts exercise repetitions without extra effort, study finds
In a study of 23 moderately trained men, exposure to chocolate odors before and between sets of leg extensions led to more repetitions without higher perceived exertion. Dark chocolate with 90% cocoa produced the strongest effect. The researchers suggest familiar food aromas may trigger brain anticipation of eating, influencing motivation.
The study involved 23 moderately trained men in their early to mid-20s who fasted for at least 10 hours before testing. They performed leg extensions, with researchers measuring performance before and during sessions. Dark chocolate with 90% cocoa yielded about 18 extra repetitions, while milk chocolate with 60% cocoa added roughly nine, compared to water.
Dark chocolate aroma also reduced hunger and increased fullness before exercise, while milk chocolate was rated more pleasant but didn't significantly alter appetite. The researchers propose that learned associations with food aromas may trigger brain anticipation of eating, which could influence motivation during physical activity.
This finding could offer a simple, non-invasive way for gym-goers and athletes to enhance training volume without added perceived effort. Fitness facilities may consider using food scents as a motivational aid, though the small sample size and focus on young men limit generalizability. Future work could examine effects in women, older populations, or other exercise modalities, potentially shaping how trainers approach performance enhancement.