Vitamin D status, dietary intake, and bone turnover in female Soldiers during military training: a longitudinal study
<p>Abstract</p> <p>Background</p> <p>Vitamin D is an essential nutrient for maintaining bone health, to include protecting against stress fracture during periods of rapid bone turnover. The objective of this longitudinal, observational study was to assess vitamin D stat...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2012-08-01
|
| Series: | Journal of the International Society of Sports Nutrition |
| Subjects: | |
| Online Access: | http://www.jissn.com/content/9/1/38 |
| _version_ | 1828196555884068864 |
|---|---|
| author | Lutz Laura J Karl J Rood Jennifer C Cable Sonya J Williams Kelly W Young Andrew J McClung James P |
| author_facet | Lutz Laura J Karl J Rood Jennifer C Cable Sonya J Williams Kelly W Young Andrew J McClung James P |
| author_sort | Lutz Laura J |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Background</p> <p>Vitamin D is an essential nutrient for maintaining bone health, to include protecting against stress fracture during periods of rapid bone turnover. The objective of this longitudinal, observational study was to assess vitamin D status, biomarkers of bone turnover, and vitamin D and calcium intake in female Soldiers (n = 91) during US Army basic combat training (BCT).</p> <p>Methods</p> <p>Anthropometric, biological and dietary intake data were collected at wk 0, 3, 6, and 9 of the 10 wk BCT course. Mixed models repeated measures ANOVAs were used to assess main effects of time, race, and time-by-race interactions.</p> <p>Results</p> <p>White volunteers experienced a decrease in serum 25(OH)D levels, whereas non-white volunteers experienced an increase during BCT. However, serum 25(OH)D levels were lower in non-whites than whites at all timepoints (P-interaction < 0.05). Group mean PTH levels increased (P < 0.05) during the first 3 wk of training, remained elevated for the duration of BCT, and were higher in non-whites compared to whites (P-race < 0.05). Biomarkers of both bone formation (bone alkaline phosphatase and procollagen I N-terminal peptide) and resorption (tartrate-resistant acid phosphatase and C-terminal telopeptide) increased (P < 0.05) during BCT, indicating increased bone turnover. Estimated daily intakes of vitamin D and calcium were below recommended levels (15 μg and 1000 mg/day, respectively), both before (group mean ± SEM; 3.9 μg/d ± 0.4 and 887 mg/d ± 67) and during BCT (4.1 μg/d ± 0.3 and 882 mg/d ± 51).</p> <p>Conclusions</p> <p>These findings demonstrate that female Soldiers experience dynamic changes in vitamin D status coupled with increased bone turnover and potentially inadequate vitamin D and calcium intake during military training.</p> |
| first_indexed | 2024-04-12T10:04:09Z |
| format | Article |
| id | doaj.art-5b1568eb8a1540ce96b14a5c1d350a9a |
| institution | Directory Open Access Journal |
| issn | 1550-2783 |
| language | English |
| last_indexed | 2024-04-12T10:04:09Z |
| publishDate | 2012-08-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of the International Society of Sports Nutrition |
| spelling | doaj.art-5b1568eb8a1540ce96b14a5c1d350a9a2022-12-22T03:37:29ZengTaylor & Francis GroupJournal of the International Society of Sports Nutrition1550-27832012-08-01913810.1186/1550-2783-9-38Vitamin D status, dietary intake, and bone turnover in female Soldiers during military training: a longitudinal studyLutz Laura JKarl JRood Jennifer CCable Sonya JWilliams Kelly WYoung Andrew JMcClung James P<p>Abstract</p> <p>Background</p> <p>Vitamin D is an essential nutrient for maintaining bone health, to include protecting against stress fracture during periods of rapid bone turnover. The objective of this longitudinal, observational study was to assess vitamin D status, biomarkers of bone turnover, and vitamin D and calcium intake in female Soldiers (n = 91) during US Army basic combat training (BCT).</p> <p>Methods</p> <p>Anthropometric, biological and dietary intake data were collected at wk 0, 3, 6, and 9 of the 10 wk BCT course. Mixed models repeated measures ANOVAs were used to assess main effects of time, race, and time-by-race interactions.</p> <p>Results</p> <p>White volunteers experienced a decrease in serum 25(OH)D levels, whereas non-white volunteers experienced an increase during BCT. However, serum 25(OH)D levels were lower in non-whites than whites at all timepoints (P-interaction < 0.05). Group mean PTH levels increased (P < 0.05) during the first 3 wk of training, remained elevated for the duration of BCT, and were higher in non-whites compared to whites (P-race < 0.05). Biomarkers of both bone formation (bone alkaline phosphatase and procollagen I N-terminal peptide) and resorption (tartrate-resistant acid phosphatase and C-terminal telopeptide) increased (P < 0.05) during BCT, indicating increased bone turnover. Estimated daily intakes of vitamin D and calcium were below recommended levels (15 μg and 1000 mg/day, respectively), both before (group mean ± SEM; 3.9 μg/d ± 0.4 and 887 mg/d ± 67) and during BCT (4.1 μg/d ± 0.3 and 882 mg/d ± 51).</p> <p>Conclusions</p> <p>These findings demonstrate that female Soldiers experience dynamic changes in vitamin D status coupled with increased bone turnover and potentially inadequate vitamin D and calcium intake during military training.</p>http://www.jissn.com/content/9/1/38Vitamin DCalciumParathyroid hormoneBone turnoverSoldiers |
| spellingShingle | Lutz Laura J Karl J Rood Jennifer C Cable Sonya J Williams Kelly W Young Andrew J McClung James P Vitamin D status, dietary intake, and bone turnover in female Soldiers during military training: a longitudinal study Journal of the International Society of Sports Nutrition Vitamin D Calcium Parathyroid hormone Bone turnover Soldiers |
| title | Vitamin D status, dietary intake, and bone turnover in female Soldiers during military training: a longitudinal study |
| title_full | Vitamin D status, dietary intake, and bone turnover in female Soldiers during military training: a longitudinal study |
| title_fullStr | Vitamin D status, dietary intake, and bone turnover in female Soldiers during military training: a longitudinal study |
| title_full_unstemmed | Vitamin D status, dietary intake, and bone turnover in female Soldiers during military training: a longitudinal study |
| title_short | Vitamin D status, dietary intake, and bone turnover in female Soldiers during military training: a longitudinal study |
| title_sort | vitamin d status dietary intake and bone turnover in female soldiers during military training a longitudinal study |
| topic | Vitamin D Calcium Parathyroid hormone Bone turnover Soldiers |
| url | http://www.jissn.com/content/9/1/38 |
| work_keys_str_mv | AT lutzlauraj vitamindstatusdietaryintakeandboneturnoverinfemalesoldiersduringmilitarytrainingalongitudinalstudy AT karlj vitamindstatusdietaryintakeandboneturnoverinfemalesoldiersduringmilitarytrainingalongitudinalstudy AT roodjenniferc vitamindstatusdietaryintakeandboneturnoverinfemalesoldiersduringmilitarytrainingalongitudinalstudy AT cablesonyaj vitamindstatusdietaryintakeandboneturnoverinfemalesoldiersduringmilitarytrainingalongitudinalstudy AT williamskellyw vitamindstatusdietaryintakeandboneturnoverinfemalesoldiersduringmilitarytrainingalongitudinalstudy AT youngandrewj vitamindstatusdietaryintakeandboneturnoverinfemalesoldiersduringmilitarytrainingalongitudinalstudy AT mcclungjamesp vitamindstatusdietaryintakeandboneturnoverinfemalesoldiersduringmilitarytrainingalongitudinalstudy |