Caffeine Consumption Is Associated With Higher Level of Physical Activity in Japanese Women

• Published in: International journal of sport nutrition and exercise metabolism 2018-09, Vol.28 (5), p.474-479
• Main Authors: Tripette, Julien, Murakami, Haruka, Hara, Hidemi, Kawakami, Ryoko, Gando, Yuko, Ohno, Harumi, Miyatake, Nobuyuki, Miyachi, Motohiko
• Format: Article
• Language: English
• Subjects: Caffeine; Exercise; Physical fitness; Women
• ISSN: 1526-484X; 1543-2742
• DOI: 10.1123/ijsnem.2017-0428

Caffeine has been described as a sports performance-enhancing substance. However, it is unclear whether it can increase the level of physical activity (PA) in nonathletic individuals. This study investigates the relationship between daily caffeine consumption and (a) daily PA/fitness or (b) intervention-induced changes in PA in women and men. On the basis of responses to a dietary habit questionnaire, which included items on caffeinated beverages, 1,032 Japanese adults, were categorized into lower or higher caffeine consumption groups (relative to the median caffeine consumption). In each group, daily step count; sedentary time; and light, moderate, and vigorous PA outcomes were objectively measured. Physical fitness, including peak oxygen consumption, was also evaluated. The relationship between daily caffeine consumption and the change in the levels of PA was investigated in a subgroup of 202 subjects who participated in a 1-year PA counseling intervention. Women in the higher caffeine consumption group presented higher moderate-to-vigorous PA and step count compared with their counterparts in the lower consumption group (4.0 ± 2.1 vs. 3.3 ± 2.1 MET-hr/day, p