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Yoshioka M, Kosaki K, Matsui M, Shibata A, Oka K, Kuro-O M, Saito C, Yamagata K, Maeda S. Replacing sedentary time for physical activity on bone density in patients with chronic kidney disease. J Bone Miner Metab 2021; 39:1091-1100. [PMID: 34319455 DOI: 10.1007/s00774-021-01255-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 07/20/2021] [Indexed: 11/27/2022]
Abstract
INTRODUCTION This study aimed to examine the cross-sectional associations of sedentary time and physical activity time with bone density in patients with chronic kidney disease (CKD). The isotemporal substitution (IS) modeling was used to estimate the beneficial effects of behavioral changes (e.g., replacing sedentary time with physical activity time) on bone density in these patients. MATERIALS AND METHODS A total of 92 patients with CKD (age: 65 ± 9 years; estimated glomerular filtration rate: 57 ± 22 mL/min/1.73 m2) were included in this cross-sectional study. The times spent in sedentary behavior (SB), light-intensity physical activity (LPA), and moderate- to vigorous-intensity physical activity (MVPA) were assessed using a triaxial accelerometer. Through quantitative ultrasound measurements, the stiffness index, as a measure of bone density, was calculated using the speed of sound and broadband ultrasound attenuation. RESULTS In multivariate analyses, the stiffness index was beneficially associated with the MVPA time (β = 0.748), but was not significantly associated with the SB and LPA times. The IS models showed that replacing 10 min/day of SB with the equivalent LPA time was not significantly associated with the stiffness index; however, replacing 10 min/day of SB with the equivalent MVPA time was beneficially associated with the stiffness index (β = 0.804). CONCLUSION These results suggest that a small increase in MVPA time (e.g., 10 min/day) may attenuate the decline in bone density in patients with CKD. Our findings may provide insight for the development of novel strategies for improving bone health in patients with CKD.
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Affiliation(s)
- Masaki Yoshioka
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8574, Japan
- Japan Society for the Promotion of Science, 5-3-1 Kouzimachi, Chiyoda-ku, Tokyo, 102-8472, Japan
| | - Keisei Kosaki
- Faculty of Health and Sport Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8574, Japan
| | - Masahiro Matsui
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8574, Japan
- Japan Society for the Promotion of Science, 5-3-1 Kouzimachi, Chiyoda-ku, Tokyo, 102-8472, Japan
| | - Ai Shibata
- Faculty of Health and Sport Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8574, Japan
| | - Koichiro Oka
- Faculty of Sport Sciences, Waseda University, 2-579-15, Tokorozawa, Saitama, 359-1192, Japan
| | - Makoto Kuro-O
- Division of Anti-Aging Medicine, Center for Molecular Medicine, Jichi Medical University, 3311-1, Yakushiji, Shimotsuke, Tochigi, Japan
| | - Chie Saito
- Department of Nephrology, Factory of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8574, Japan
| | - Kunihiro Yamagata
- Department of Nephrology, Factory of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8574, Japan
- R&D Center for Smart Wellness City Policies, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Seiji Maeda
- Faculty of Health and Sport Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8574, Japan.
- Faculty of Sport Sciences, Waseda University, 2-579-15, Tokorozawa, Saitama, 359-1192, Japan.
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