{"id":{"repo_id":"central-wash","oai_identifier":"oai:digitalcommons.cwu.edu:etd-1751"},"canonical_url":"https://search.dev.ndltd.org/etd/central-wash/oai:digitalcommons.cwu.edu:etd-1751","repository":{"repo_id":"central-wash","name":"Central Washington University","base_url":"https://digitalcommons.cwu.edu/do/oai/"},"display":{"title":"Effect of a Sliding Scale Vitamin D Supplementation Protocol on 25(OH)D Status in Elite Athletes with Spinal Cord Injury","abstract":"Recent studies suggest that a substantial proportion of elite athletes with SCI (spinal cord injury) have insufficient 25(OH)D status which may be associated with decreased muscle strength. This study: 1) examined the effects of a 16-week sliding scale Vitamin D supplementation protocol on 25(OH)D concentration and 2) determined whether subsequent 25(OH)D status impacts muscle performance in elite athletes with SCI. Thirty-four members of the US Olympic Committee Paralympic program, and the Canadian Wheelchair Sports Association from outdoor sports participated. Serum 25(OH)D concentrations, lifestyle and dietary factors were assessed during the Winter and Spring. Participants were assigned a 16-week sliding scale vitamin D3 (cholecalciferol) (KleanAthlete Brand) supplementation protocol based on initial 25(OH)D levels. Participants with deficient 25(OH)D (<50 nmol/L) status received 50,000 IU/wk. for 8 wks., and participants with insufficient status (50-75 nmol/L) received 35,000 IU/week for 4 weeks followed by a maintenance dosage of 15,000 IU/wk. Participants with sufficient status (>75nmol/L) received the maintenance dosage of 15,000 IU/wk. 25 (OH)D concentrations increased significantly after supplementation (<em>p </em><.001; 66.3 + 24.3 nmol/L; 111.3 + 30.8 nmol/L) for Winter and Spring, respectively. 26% of athletes had sufficient 25(OH)D concentrations prior to supplementation, and 91% had sufficient concentrations post supplementation. 62% of participants improved handgrip strength post supplementation. No change in 20-meter wheelchair sprint performance time was observed. The 16-week sliding scale supplementation protocol used in the current study is effective for achieving sufficient vitamin D concentrations during the winter months in elite athletes with SCI.","abstract_html":"Recent studies suggest that a substantial proportion of elite athletes with SCI (spinal cord injury) have insufficient 25(OH)D status which may be associated with decreased muscle strength. This study: 1) examined the effects of a 16-week sliding scale Vitamin D supplementation protocol on 25(OH)D concentration and 2) determined whether subsequent 25(OH)D status impacts muscle performance in elite athletes with SCI. Thirty-four members of the US Olympic Committee Paralympic program, and the Canadian Wheelchair Sports Association from outdoor sports participated. Serum 25(OH)D concentrations, lifestyle and dietary factors were assessed during the Winter and Spring. Participants were assigned a 16-week sliding scale vitamin D3 (cholecalciferol) (KleanAthlete Brand) supplementation protocol based on initial 25(OH)D levels. Participants with deficient 25(OH)D (&lt;50 nmol/L) status received 50,000 IU/wk. for 8 wks., and participants with insufficient status (50-75 nmol/L) received 35,000 IU/week for 4 weeks followed by a maintenance dosage of 15,000 IU/wk. Participants with sufficient status (&gt;75nmol/L) received the maintenance dosage of 15,000 IU/wk. 25 (OH)D concentrations increased significantly after supplementation (&lt;em&gt;p &lt;/em&gt;&lt;.001; 66.3 + 24.3 nmol/L; 111.3 + 30.8 nmol/L) for Winter and Spring, respectively. 26% of athletes had sufficient 25(OH)D concentrations prior to supplementation, and 91% had sufficient concentrations post supplementation. 62% of participants improved handgrip strength post supplementation. No change in 20-meter wheelchair sprint performance time was observed. The 16-week sliding scale supplementation protocol used in the current study is effective for achieving sufficient vitamin D concentrations during the winter months in elite athletes with SCI.","abstract_has_math":false,"creators":["Stark, Lauren","Pritchett, Kelly","Pritchett, Robert","Broad, Elizabeth"],"institution":null,"degree_name":"Master of Science (MS)","degree_level":null,"degree_discipline":"Nutrition","degree_department":null,"school":null,"contributors":["Kelly Pritchett","Robert Pritchett","Elizabeth Broad"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2017,"date_issued":"2017-01-01T08:00:00Z","date_published":"2017-01-01T08:00:00Z","updated_at":"2026-07-24T01:37:09Z","subjects":["Vitamin D","Spinal Cord","Athletes","Medicine and Health Sciences","Rehabilitation and Therapy"],"languages":["English"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://digitalcommons.cwu.edu/etd/783","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Kelly Pritchett","Robert Pritchett","Elizabeth Broad"]},{"key":"dc:creator","label":"Author","values":["Stark, Lauren","Pritchett, Kelly","Pritchett, Robert","Broad, Elizabeth"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.available","label":"Dc Date Available","values":["2017-09-15T07:00:00Z"]},{"key":"dc:type","label":"Dc Type","values":["Text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Nutrition"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science (MS)"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Vitamin D","Spinal Cord","Athletes","Medicine and Health Sciences","Rehabilitation and Therapy"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["English"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://digitalcommons.cwu.edu/etd/783"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Recent studies suggest that a substantial proportion of elite athletes with SCI (spinal cord injury) have insufficient 25(OH)D status which may be associated with decreased muscle strength. This study: 1) examined the effects of a 16-week sliding scale Vitamin D supplementation protocol on 25(OH)D concentration and 2) determined whether subsequent 25(OH)D status impacts muscle performance in elite athletes with SCI. Thirty-four members of the US Olympic Committee Paralympic program, and the Canadian Wheelchair Sports Association from outdoor sports participated. Serum 25(OH)D concentrations, lifestyle and dietary factors were assessed during the Winter and Spring. Participants were assigned a 16-week sliding scale vitamin D3 (cholecalciferol) (KleanAthlete Brand) supplementation protocol based on initial 25(OH)D levels. Participants with deficient 25(OH)D (<50 nmol/L) status received 50,000 IU/wk. for 8 wks., and participants with insufficient status (50-75 nmol/L) received 35,000 IU/week for 4 weeks followed by a maintenance dosage of 15,000 IU/wk. Participants with sufficient status (>75nmol/L) received the maintenance dosage of 15,000 IU/wk. 25 (OH)D concentrations increased significantly after supplementation (<em>p </em><.001; 66.3 + 24.3 nmol/L; 111.3 + 30.8 nmol/L) for Winter and Spring, respectively. 26% of athletes had sufficient 25(OH)D concentrations prior to supplementation, and 91% had sufficient concentrations post supplementation. 62% of participants improved handgrip strength post supplementation. No change in 20-meter wheelchair sprint performance time was observed. The 16-week sliding scale supplementation protocol used in the current study is effective for achieving sufficient vitamin D concentrations during the winter months in elite athletes with SCI."]},{"key":"dc:title","label":"Title","values":["Effect of a Sliding Scale Vitamin D Supplementation Protocol on 25(OH)D Status in Elite Athletes with Spinal Cord Injury"]}]}],"canonical_facts":{"dc:contributor":["Kelly Pritchett","Robert Pritchett","Elizabeth Broad"],"dc:creator":["Stark, Lauren","Pritchett, Kelly","Pritchett, Robert","Broad, Elizabeth"],"dc:date.available":["2017-09-15T07:00:00Z"],"dc:description.abstract":["Recent studies suggest that a substantial proportion of elite athletes with SCI (spinal cord injury) have insufficient 25(OH)D status which may be associated with decreased muscle strength. This study: 1) examined the effects of a 16-week sliding scale Vitamin D supplementation protocol on 25(OH)D concentration and 2) determined whether subsequent 25(OH)D status impacts muscle performance in elite athletes with SCI. Thirty-four members of the US Olympic Committee Paralympic program, and the Canadian Wheelchair Sports Association from outdoor sports participated. Serum 25(OH)D concentrations, lifestyle and dietary factors were assessed during the Winter and Spring. Participants were assigned a 16-week sliding scale vitamin D3 (cholecalciferol) (KleanAthlete Brand) supplementation protocol based on initial 25(OH)D levels. Participants with deficient 25(OH)D (<50 nmol/L) status received 50,000 IU/wk. for 8 wks., and participants with insufficient status (50-75 nmol/L) received 35,000 IU/week for 4 weeks followed by a maintenance dosage of 15,000 IU/wk. Participants with sufficient status (>75nmol/L) received the maintenance dosage of 15,000 IU/wk. 25 (OH)D concentrations increased significantly after supplementation (<em>p </em><.001; 66.3 + 24.3 nmol/L; 111.3 + 30.8 nmol/L) for Winter and Spring, respectively. 26% of athletes had sufficient 25(OH)D concentrations prior to supplementation, and 91% had sufficient concentrations post supplementation. 62% of participants improved handgrip strength post supplementation. No change in 20-meter wheelchair sprint performance time was observed. The 16-week sliding scale supplementation protocol used in the current study is effective for achieving sufficient vitamin D concentrations during the winter months in elite athletes with SCI."],"dc:identifier":["https://digitalcommons.cwu.edu/etd/783"],"dc:language":["English"],"dc:subject":["Vitamin D","Spinal Cord","Athletes","Medicine and Health Sciences","Rehabilitation and Therapy"],"dc:title":["Effect of a Sliding Scale Vitamin D Supplementation Protocol on 25(OH)D Status in Elite Athletes with Spinal Cord Injury"],"dc:type":["Text"],"thesis:degree_discipline":["Nutrition"],"thesis:degree_name":["Master of Science (MS)"]},"updated_at":"2026-07-24T01:37:09Z"}