Biomedical Research 2016; Special Issue: S384-S388 ISSN 0970-938X www.biomedres.info
Jong-Hwan Park, Institute of Convergence Bio-Health, Dong-A University, Busan, Republic of Korea
- Youths with < 12.5 nanograms of Vitamin D were 13.9 times more likely to walk slower than 0.8 meter/sec
- All previous walking speed and vitamin D studies focused on seniors
- 80 percent of the characteristics of frailty associated with low vitamin D – May 2013
- Seniors 2.2 X more likely to walk slowly if very low vitamin D – meta-analysis Dec 2017
- Youth category listing has
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The purpose of the present study was to examine whether serum vitamin D status is associated with a change in gait speed in young adults. In this cross-sectional study, 60 young adults aged > 19 years (36 female and 24 male participants) were recruited from the general population. Spatiotemporal parameters of gait were assessed by using a validated wireless inertial sensing device.
The blood vitamin D status was classified as
- deficiency (<12.5 ng/ml),
- insufficiency (> 12.5 ng/ml to <20 ng/ml), and
- sufficiency (> 20 ng/ml).
Linear increases in physical performance parameters such as grip strength, gait speed, stride length, and High-Density Lipoprotein Cholesterol (HDL-C) were found across the incremental categories of serum 25-hydroxyvitamin D (25(OH)D).
A significant positive association was observed between serum 25(OH)D levels and
- HDL-C (r=0.759, P=0.001),
- grip strength (r=0.329, P=0.011),
- gait speed (r=0.873, P=0.001),
- stride length (r=0.690, P=0.001), and
- swing phase (r=0.322, P=0.013).
A decline in gait speed was more likely to be associated with serum 25(OH)D deficiency (Odds Ratio: (OR), 13.1; 95% Confidence Interval (CI), 3.84-45.02; adjusted OR, 13.9; 95% CI, 3.61-53.7). To our knowledge, this cross-sectional study is the first to report that higher serum 25(OH)D levels are associated with gait ability and lipid parameters in young adults. Multiple regression analysis showed that vitamin D status is an independent predictive factor for a decline in gait speed.
- "The subjects were asked to walk along an 8 m pathway at a self-selected speed as naturally as possible. "
Possibly slow gate speed was defined as <0.8 m/s