Effects of dietary nitrate supplementation on the oxygen cost of exercise and walking performance in individuals with type 2 diabetes: a randomized, double-blind, placebo-controlled crossover trial

2.50
Hdl Handle:
http://hdl.handle.net/11287/594024
Title:
Effects of dietary nitrate supplementation on the oxygen cost of exercise and walking performance in individuals with type 2 diabetes: a randomized, double-blind, placebo-controlled crossover trial
Authors:
Shepherd, Anthony I.; Gilchrist, Mark; Winyard, Paul G.; Jones, Angus M.; Hallmann, E.; Kazimierczak, R.; Rembialkowska, E.; Benjamin, N.; Shore, Angela ( 0000-0003-3039-308x ) ; Wilkerson, D. P.
Abstract:
Dietary nitrate supplementation has been shown to reduce the oxygen (O2) cost of exercise and enhance exercise tolerance in healthy individuals. This study assessed whether similar effects could be observed in individuals with type 2 diabetes (T2DM). In a randomized, double-blind, placebo-controlled crossover study, 48 participants with T2DM supplemented their diet for 4 days with either nitrate-rich beetroot juice (70ml/day, 6.43mmol nitrate/day) or nitrate-depleted beetroot juice as placebo (70ml/day, 0.07mmol nitrate/day). After each intervention period, resting plasma nitrate and nitrite concentrations were measured subsequent to participants completing moderate-paced walking. Pulmonary gas exchange was measured to assess the O2 cost of walking. After a rest period, participants performed the 6-min walk test (6MWT). Relative to placebo, beetroot juice resulted in a significant increase in plasma nitrate (placebo, 57+/-66 vs beetroot, 319+/-110microM; P < 0.001) and plasma nitrite concentration (placebo, 680+/-256 vs beetroot, 1065+/-607nM; P < 0.001). There were no differences between placebo juice and beetroot juice for the O2 cost of walking (946+/-221 vs 939+/-223ml/min, respectively; P = 0.59) and distance covered in the 6MWT (550+/-83 vs 554+/-90m, respectively; P = 0.17). Nitrate supplementation did not affect the O2 cost of moderate-paced walking or improve performance in the 6MWT. These findings indicate that dietary nitrate supplementation does not modulate the response to exercise in individuals with T2DM.
Citation:
Free Radic Biol Med. 2015 Sep;86:200-8.
Publisher:
Elsevier
Journal:
Free radical biology & medicine
Issue Date:
1-Sep-2015
URI:
http://hdl.handle.net/11287/594024
DOI:
10.1016/j.freeradbiomed.2015.05.014
PubMed ID:
25998421
Additional Links:
http://www.sciencedirect.com/science/article/pii/S0891584915002257
Type:
Journal Article; Research Support, Non-U.S. Gov't
Language:
eng
ISSN:
1873-4596
Appears in Collections:
2015 RD&E publications; Honorary contracts publications

Full metadata record

DC FieldValue Language
dc.contributor.authorShepherd, Anthony I.en
dc.contributor.authorGilchrist, Marken
dc.contributor.authorWinyard, Paul G.en
dc.contributor.authorJones, Angus M.en
dc.contributor.authorHallmann, E.en
dc.contributor.authorKazimierczak, R.en
dc.contributor.authorRembialkowska, E.en
dc.contributor.authorBenjamin, N.en
dc.contributor.authorShore, Angelaen
dc.contributor.authorWilkerson, D. P.en
dc.date.accessioned2016-01-19T12:38:44Zen
dc.date.available2016-01-19T12:38:44Zen
dc.date.issued2015-09-01en
dc.identifier.citationFree Radic Biol Med. 2015 Sep;86:200-8.en
dc.identifier.issn1873-4596en
dc.identifier.pmid25998421en
dc.identifier.doi10.1016/j.freeradbiomed.2015.05.014en
dc.identifier.urihttp://hdl.handle.net/11287/594024en
dc.description.abstractDietary nitrate supplementation has been shown to reduce the oxygen (O2) cost of exercise and enhance exercise tolerance in healthy individuals. This study assessed whether similar effects could be observed in individuals with type 2 diabetes (T2DM). In a randomized, double-blind, placebo-controlled crossover study, 48 participants with T2DM supplemented their diet for 4 days with either nitrate-rich beetroot juice (70ml/day, 6.43mmol nitrate/day) or nitrate-depleted beetroot juice as placebo (70ml/day, 0.07mmol nitrate/day). After each intervention period, resting plasma nitrate and nitrite concentrations were measured subsequent to participants completing moderate-paced walking. Pulmonary gas exchange was measured to assess the O2 cost of walking. After a rest period, participants performed the 6-min walk test (6MWT). Relative to placebo, beetroot juice resulted in a significant increase in plasma nitrate (placebo, 57+/-66 vs beetroot, 319+/-110microM; P < 0.001) and plasma nitrite concentration (placebo, 680+/-256 vs beetroot, 1065+/-607nM; P < 0.001). There were no differences between placebo juice and beetroot juice for the O2 cost of walking (946+/-221 vs 939+/-223ml/min, respectively; P = 0.59) and distance covered in the 6MWT (550+/-83 vs 554+/-90m, respectively; P = 0.17). Nitrate supplementation did not affect the O2 cost of moderate-paced walking or improve performance in the 6MWT. These findings indicate that dietary nitrate supplementation does not modulate the response to exercise in individuals with T2DM.en
dc.language.isoengen
dc.publisherElsevieren
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0891584915002257en
dc.titleEffects of dietary nitrate supplementation on the oxygen cost of exercise and walking performance in individuals with type 2 diabetes: a randomized, double-blind, placebo-controlled crossover trialen
dc.typeJournal Articleen
dc.typeResearch Support, Non-U.S. Gov'ten
dc.identifier.journalFree radical biology & medicineen

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