Jochen Klenk1, Kilian Rapp2, Michael Denkinger3, Gabriele Nagel4, Thorsten Nikolaus3, Richard Peter4, Bernhard O Boehm5, Wolfgang Koenig6, Dietrich Rothenbacher4. 1. Institute of Epidemiology and Medical Biometry, Ulm University, Ulm, Germany Department of Clinical Gerontology, Robert-Bosch-Hospital, Stuttgart, Germany. 2. Department of Clinical Gerontology, Robert-Bosch-Hospital, Stuttgart, Germany. 3. Agaplesion Bethesda Clinic, Ulm, Germany. 4. Institute of Epidemiology and Medical Biometry, Ulm University, Ulm, Germany. 5. Division of Endocrinology, Department of Internal Medicine I, University of Ulm Medical Centre, Ulm, Germany LKC School of Medicine, Imperial College London and Nanyang Technological University, Singapore, Singapore. 6. Department of Internal Medicine II-Cardiology, University of Ulm Medical Centre, Ulm, Germany.
Abstract
BACKGROUND: To analyse the seasonal relationship of objectively measured physical activity with vitamin D status in older persons from Southern Germany (latitude: 48.4°N). METHODS: Physical activity was assessed in 1193 community-dwelling individuals aged ≥65 years (58% men) over 1 week using a thigh-worn accelerometer. Furthermore, the 25-hydroxyvitamin D (25(OH)D) level was measured. Least-square means of 25(OH)D serum levels were calculated for quartiles of average daily walking duration stratified by season and adjusted for gender, age and body mass index. Participants with prescribed vitamin D supplements were excluded. RESULTS: Statistically significant linear associations between quartiles of walking duration with 25(OH)D serum levels were observed in all seasons but not in summer. Differences in 25(OH)D serum levels between the first and the last quartile were 3.42 ng/mL (p=0.002) in winter, 2.80 ng/mL (p=0.009) in spring, and 3.60 ng/mL (p<0.001) in the fall. The proportion of vitamin D insufficiency (<20 ng/mL) even in the highest quartile of walking duration was 45.3% in winter, 73.7% in spring, 17.4% in summer and 16.5% in the fall. CONCLUSIONS: Although a positive dose-response relationship was seen between walking duration and the 25(OH)D serum level for most seasons, vitamin D insufficiency was still very prevalent even in high-active persons during all seasons. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.
BACKGROUND: To analyse the seasonal relationship of objectively measured physical activity with vitamin D status in older persons from Southern Germany (latitude: 48.4°N). METHODS: Physical activity was assessed in 1193 community-dwelling individuals aged ≥65 years (58% men) over 1 week using a thigh-worn accelerometer. Furthermore, the 25-hydroxyvitamin D (25(OH)D) level was measured. Least-square means of 25(OH)D serum levels were calculated for quartiles of average daily walking duration stratified by season and adjusted for gender, age and body mass index. Participants with prescribed vitamin D supplements were excluded. RESULTS: Statistically significant linear associations between quartiles of walking duration with 25(OH)D serum levels were observed in all seasons but not in summer. Differences in 25(OH)D serum levels between the first and the last quartile were 3.42 ng/mL (p=0.002) in winter, 2.80 ng/mL (p=0.009) in spring, and 3.60 ng/mL (p<0.001) in the fall. The proportion of vitamin Dinsufficiency (<20 ng/mL) even in the highest quartile of walking duration was 45.3% in winter, 73.7% in spring, 17.4% in summer and 16.5% in the fall. CONCLUSIONS: Although a positive dose-response relationship was seen between walking duration and the 25(OH)D serum level for most seasons, vitamin Dinsufficiency was still very prevalent even in high-active persons during all seasons. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.
Entities:
Keywords:
ELDERLY; GERONTOLOGY; PHYSICAL ACTIVITY; PUBLIC HEALTH; SEASONAL
Authors: Kamil F Faridi; Di Zhao; Seth S Martin; Joshua R Lupton; Steven R Jones; Eliseo Guallar; Christie M Ballantyne; Pamela L Lutsey; Erin D Michos Journal: Nutrition Date: 2017-02-03 Impact factor: 4.008
Authors: Kathleen Chin; Di Zhao; Martin Tibuakuu; Seth S Martin; Chiadi E Ndumele; Roberta Florido; B Gwen Windham; Eliseo Guallar; Pamela L Lutsey; Erin D Michos Journal: J Clin Endocrinol Metab Date: 2017-04-01 Impact factor: 5.958
Authors: Jordan T Hall; Myla Ebeling; Judy R Shary; Nina Forestieri; Carol L Wagner Journal: J Steroid Biochem Mol Biol Date: 2017-09-01 Impact factor: 4.292
Authors: T Merlijn; K M A Swart; P Lips; M W Heymans; E Sohl; N M Van Schoor; C J Netelenbos; P J M Elders Journal: Osteoporos Int Date: 2018-05-28 Impact factor: 4.507
Authors: Charlotte L Edwardson; Elisabeth A H Winkler; Danielle H Bodicoat; Tom Yates; Melanie J Davies; David W Dunstan; Genevieve N Healy Journal: J Sport Health Sci Date: 2016-02-03 Impact factor: 7.179
Authors: Inmaculada Gómez-Carrascosa; María L Sánchez-Ferrer; Julian J Arense-Gonzalo; María T Prieto-Sánchez; Emilia Alfosea-Marhuenda; Miguel A Iniesta; Jaime Mendiola; Alberto M Torres-Cantero Journal: Nurs Open Date: 2021-05-15