IJERPH, Vol. 15, Pages 167: Influence of Muscle Mass and Outdoor Environmental Factors on Appetite and Satiety Feeling in Young Japanese Women

IJERPH, Vol. 15, Pages 167: Influence of Muscle Mass and Outdoor Environmental Factors on Appetite and Satiety Feeling in Young Japanese Women

International Journal of Environmental Research and Public Health doi: 10.3390/ijerph15010167

Authors: Masahiro Okada

Research on the influence of relationships among satiety, muscle mass, and outdoor environmental factors is sparse. In this work the relationships among satiety feeling, body composition, and outdoor environmental factors on eating in healthy young Japanese women are investigated. Fifty three (53) women were examined over an approximately 2-year period. All participants ate the same lunch; feelings of satiety and body composition were measured before and immediately after lunch. Satiety was assessed using a visual analog scale. Outdoor environmental factors were recorded at the time of measurement. Results showed that satiety before lunch decreased with increased muscle mass and decreased humidity (p < 0.05). The Δ satiety increased on eating with increased outdoor temperature (p < 0.05). The Δ satiety with high outdoor temperature was significantly greater than with low outdoor temperature (p = 0.005). Decreased muscle mass more influenced Δ satiety with respect to outdoor temperature than increased muscle mass (p = 0.007). The results suggest that increased muscle mass and decreased humidity increase hunger (unlike satiety) before eating. The findings also show that outdoor temperature clearly influences the magnitude of satiety on eating. Increasing muscle mass may be useful for satiety control at various outdoor temperatures in young women.

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