Effects of Daily Vitamin D Supplementation on Objectively Measured Physical Activity: Results From the STURDY Trial. (16th December 2020)

• Record Type: Journal Article
• Authors: Schrack, Jennifer; Urbanek, Jacek; Wanigatunga, Amal; Juraschek, Stephen; Mitchell, Christine; Michos, Erin; Roth, David; Appel, Lawrence
• Is Part Of: Innovation in aging. Volume 4(2020)Supplement 1
• Page Start: 760
• Page End: 760
• Publication Date: 2020-12-16
• Subjects: Aging -- Periodicals; Gerontology -- Periodicals; 612.67
• DOI: 10.1093/geroni/igaa057.2740
• Languages: English
• ISSNs: 2399-5300

Abstract

Abstract: Cross-sectional evidence suggests older adults with higher serum vitamin D are more physically active, but whether long-term vitamin D supplementation attenuates age-related declines in physical activity (PA) is undefined. We examined the association between vitamin D supplementation and daily PA in 639 STURDY participants (aged 77 (5.4) years; 44% women) over up to 24-months. Participants were randomized to receive 200 (n=275), 1000 (n=168), 2000 (n=59), or 4000 (n=63) IU/day of vitamin D3. PA was measured using the Actigraph Link wrist-worn accelerometer 24 hours/day for 7-days at baseline, 3, 12, and 24 months. In linear mixed models adjusted for baseline PA level, total daily PA appeared to decline (β=-43.3 counts, p=0.06) annually for all groups and there was no difference by vitamin D3 dose (p for group*time =0.14). These results suggest daily vitamin D supplementation has no effect on quantities of daily PA.