TY - JOUR
T1 - Protein intake in inhabitants with regular exercise is associated with sleep quality
T2 - Results of the Shika study
AU - Suzuki, Fumihiko
AU - Morita, Emi
AU - Miyagi, Sakae
AU - Tsujiguchi, Hiromasa
AU - Hara, Akinori
AU - Nguyen, Thao Thi Thu
AU - Shimizu, Yukari
AU - Hayashi, Koichiro
AU - Suzuki, Keita
AU - Kannon, Takayuki
AU - Tajima, Atsushi
AU - Matsumoto, Sumire
AU - Ishihara, Asuka
AU - Hori, Daisuke
AU - Doki, Shotaro
AU - Oi, Yuichi
AU - Sasahara, Shinichiro
AU - Satoh, Makoto
AU - Matsuzaki, Ichiyo
AU - Yanagisawa, Masashi
AU - Ikaga, Toshiharu
AU - Nakamura, Hiroyuki
N1 - Publisher Copyright:
© 2021 Suzuki et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
PY - 2021/2
Y1 - 2021/2
N2 - Study objectives Although associations between sleep quality and environmental factors and nutrient intake have been reported, interactions between these factors have not been elucidated in detail. Therefore, this cross-sectional study examined the effects of regular exercise and nutrient intake on sleep quality using the Pittsburgh Sleep Quality Index (PSQI), which is the most frequently used index for sleep evaluation. Methods The participants included 378 individuals aged 40 years or older living in Shika Town, Ishikawa Prefecture. Of these individuals, 185 met the inclusion criteria. The participants completed a self-administered questionnaire assessing lifestyle habits and frequency and duration of exercise, the PSQI, and the brief-type self-administered diet history questionnaire (BDHQ) on nutrient intake. Results A two-way analysis of covariance on regular exercise and PSQI scores indicated that protein intake (17.13% of energy) was significantly higher in the regular exercise and PSQI ≤10 groups than in the non-regular exercise or PSQI ≥11 groups (p = 0.002). In a multiple logistic regression analysis with PSQI scores (≤10 and ≥11), protein intake was a significant independent variable in any of the models adjusted for confounding factors such as age, sex, body mass index, current smoker, and current drinker (OR: 1.357, 95% CI: 1.081, 1.704, p = 0.009) in the regular exercise group but not in the non-regular exercise group. Conclusions We identified a positive relationship between sleep quality and protein intake in the regular exercise group. These findings suggest that regular exercise at least twice a week for 30 minutes or longer combined with high protein intake contributes to good sleep quality.
AB - Study objectives Although associations between sleep quality and environmental factors and nutrient intake have been reported, interactions between these factors have not been elucidated in detail. Therefore, this cross-sectional study examined the effects of regular exercise and nutrient intake on sleep quality using the Pittsburgh Sleep Quality Index (PSQI), which is the most frequently used index for sleep evaluation. Methods The participants included 378 individuals aged 40 years or older living in Shika Town, Ishikawa Prefecture. Of these individuals, 185 met the inclusion criteria. The participants completed a self-administered questionnaire assessing lifestyle habits and frequency and duration of exercise, the PSQI, and the brief-type self-administered diet history questionnaire (BDHQ) on nutrient intake. Results A two-way analysis of covariance on regular exercise and PSQI scores indicated that protein intake (17.13% of energy) was significantly higher in the regular exercise and PSQI ≤10 groups than in the non-regular exercise or PSQI ≥11 groups (p = 0.002). In a multiple logistic regression analysis with PSQI scores (≤10 and ≥11), protein intake was a significant independent variable in any of the models adjusted for confounding factors such as age, sex, body mass index, current smoker, and current drinker (OR: 1.357, 95% CI: 1.081, 1.704, p = 0.009) in the regular exercise group but not in the non-regular exercise group. Conclusions We identified a positive relationship between sleep quality and protein intake in the regular exercise group. These findings suggest that regular exercise at least twice a week for 30 minutes or longer combined with high protein intake contributes to good sleep quality.
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U2 - 10.1371/journal.pone.0247926
DO - 10.1371/journal.pone.0247926
M3 - Article
C2 - 33635905
AN - SCOPUS:85102157363
SN - 1932-6203
VL - 16
JO - PloS one
JF - PloS one
IS - 2 February
M1 - e0247926
ER -