The effect of dietary nitrate supplementation on performance in trained male flatwater kayakers

D. J. Muggeridge, C. C. F. Howe, O. Spendiff, C. Pedlar, P. E. James, C. Easton

Research output: Contribution to conferencePaper

Abstract

Previous studies have reported that supplementation with nitrate-rich beetroot juice (BR) reduces the oxygen cost (VO2) of submaximal cycling and running exercise and improves both exercise capacity and performance. To date, no study has investigated the performance effects of BR on sports which rely on the recruitment of large upper body muscle mass, such as flatwater kayaking. Purpose: To determine the effects of dietary nitrate on parameters of performance in trained male kayakers. Methods: Seven male kayakers completed four exercise trials consisting of an initial discontinuous graded exercise test to exhaustion and three performance trials using a kayak ergometer. The performance trials were composed of 15 min steady state exercise at 60% of maximum work rate, 5 × 10-second maximal sprints and, following a 5 min rest period, a 1 km time trial (TT). The first trial provided a baseline measurement and the second and third trials were preceded by ingestion of either 70 ml concentrated BR or tomato juice (placebo [PLA]) 3 h prior to exercise using a randomised cross-over design. Results: Plasma nitrate (PLA: 34.1 ± 8.3 μM, BR: 152.0 ± 14.7 μM) and nitrite (PLA: 546.5 ± 76.0, BR: 702.9 ± 73.4 nM) were higher following ingestion of BR compared to PLA (both P < 0.01). VO2 was lower in the BR trial than in the PLA trial (PLA: 35.8 ± 1.4 ml kg min−1, BR: 34.6 ± 1.1 ml kg min−1, P = 0.02). There was no difference in either peak power output in the maximal sprints (P = 0.91) or TT performance between conditions (PLA: 4.6 ± 0.3 min, BR: 4.6 ± 0.3 min, P=0.91). Conclusion: In line with previous research, ingestion of BR reduced VO2 during submaximal kayak exercise although contrastingly had no impact on kayak TT performance. These differences may be attributed to the specific physiological demands of sprint kayaking.

Conference

Conference7th INTERNATIONAL CONFERENCE ON THE BIOLOGY, CHEMISTRY AND THERAPEUTIC APPLICATION OF NITRIC OXIDE
CountryUnited Kingdom
CityEdinburgh
Period22/07/1226/10/16

Fingerprint

Dietary Supplements
Nitrates
Placebos
Eating
Lycopersicon esculentum
Nitrites
Exercise Test
Running
Cross-Over Studies
Sports
Oxygen
Costs and Cost Analysis
Muscles
Research

Keywords

  • dietary nitrate
  • physical activity
  • kayak
  • nitrate-rich beetroot juice
  • oxygen cost

Cite this

Muggeridge, D. J., Howe, C. C. F., Spendiff, O., Pedlar, C., James, P. E., & Easton, C. (2012). The effect of dietary nitrate supplementation on performance in trained male flatwater kayakers. S12. Paper presented at 7th INTERNATIONAL CONFERENCE ON THE BIOLOGY, CHEMISTRY AND THERAPEUTIC APPLICATION OF NITRIC OXIDE, Edinburgh, United Kingdom. https://doi.org/10.1016/j.niox.2012.04.044
Muggeridge, D. J. ; Howe, C. C. F. ; Spendiff, O. ; Pedlar, C. ; James, P. E. ; Easton, C. / The effect of dietary nitrate supplementation on performance in trained male flatwater kayakers. Paper presented at 7th INTERNATIONAL CONFERENCE ON THE BIOLOGY, CHEMISTRY AND THERAPEUTIC APPLICATION OF NITRIC OXIDE, Edinburgh, United Kingdom.1 p.
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Muggeridge, DJ, Howe, CCF, Spendiff, O, Pedlar, C, James, PE & Easton, C 2012, 'The effect of dietary nitrate supplementation on performance in trained male flatwater kayakers' Paper presented at 7th INTERNATIONAL CONFERENCE ON THE BIOLOGY, CHEMISTRY AND THERAPEUTIC APPLICATION OF NITRIC OXIDE, Edinburgh, United Kingdom, 22/07/12 - 26/10/16, pp. S12. https://doi.org/10.1016/j.niox.2012.04.044

The effect of dietary nitrate supplementation on performance in trained male flatwater kayakers. / Muggeridge, D. J.; Howe, C. C. F.; Spendiff, O.; Pedlar, C.; James, P. E.; Easton, C.

2012. S12 Paper presented at 7th INTERNATIONAL CONFERENCE ON THE BIOLOGY, CHEMISTRY AND THERAPEUTIC APPLICATION OF NITRIC OXIDE, Edinburgh, United Kingdom.

Research output: Contribution to conferencePaper

TY - CONF

T1 - The effect of dietary nitrate supplementation on performance in trained male flatwater kayakers

AU - Muggeridge, D. J.

AU - Howe, C. C. F.

AU - Spendiff, O.

AU - Pedlar, C.

AU - James, P. E.

AU - Easton, C.

PY - 2012/7/4

Y1 - 2012/7/4

N2 - Previous studies have reported that supplementation with nitrate-rich beetroot juice (BR) reduces the oxygen cost (VO2) of submaximal cycling and running exercise and improves both exercise capacity and performance. To date, no study has investigated the performance effects of BR on sports which rely on the recruitment of large upper body muscle mass, such as flatwater kayaking. Purpose: To determine the effects of dietary nitrate on parameters of performance in trained male kayakers. Methods: Seven male kayakers completed four exercise trials consisting of an initial discontinuous graded exercise test to exhaustion and three performance trials using a kayak ergometer. The performance trials were composed of 15 min steady state exercise at 60% of maximum work rate, 5 × 10-second maximal sprints and, following a 5 min rest period, a 1 km time trial (TT). The first trial provided a baseline measurement and the second and third trials were preceded by ingestion of either 70 ml concentrated BR or tomato juice (placebo [PLA]) 3 h prior to exercise using a randomised cross-over design. Results: Plasma nitrate (PLA: 34.1 ± 8.3 μM, BR: 152.0 ± 14.7 μM) and nitrite (PLA: 546.5 ± 76.0, BR: 702.9 ± 73.4 nM) were higher following ingestion of BR compared to PLA (both P < 0.01). VO2 was lower in the BR trial than in the PLA trial (PLA: 35.8 ± 1.4 ml kg min−1, BR: 34.6 ± 1.1 ml kg min−1, P = 0.02). There was no difference in either peak power output in the maximal sprints (P = 0.91) or TT performance between conditions (PLA: 4.6 ± 0.3 min, BR: 4.6 ± 0.3 min, P=0.91). Conclusion: In line with previous research, ingestion of BR reduced VO2 during submaximal kayak exercise although contrastingly had no impact on kayak TT performance. These differences may be attributed to the specific physiological demands of sprint kayaking.

AB - Previous studies have reported that supplementation with nitrate-rich beetroot juice (BR) reduces the oxygen cost (VO2) of submaximal cycling and running exercise and improves both exercise capacity and performance. To date, no study has investigated the performance effects of BR on sports which rely on the recruitment of large upper body muscle mass, such as flatwater kayaking. Purpose: To determine the effects of dietary nitrate on parameters of performance in trained male kayakers. Methods: Seven male kayakers completed four exercise trials consisting of an initial discontinuous graded exercise test to exhaustion and three performance trials using a kayak ergometer. The performance trials were composed of 15 min steady state exercise at 60% of maximum work rate, 5 × 10-second maximal sprints and, following a 5 min rest period, a 1 km time trial (TT). The first trial provided a baseline measurement and the second and third trials were preceded by ingestion of either 70 ml concentrated BR or tomato juice (placebo [PLA]) 3 h prior to exercise using a randomised cross-over design. Results: Plasma nitrate (PLA: 34.1 ± 8.3 μM, BR: 152.0 ± 14.7 μM) and nitrite (PLA: 546.5 ± 76.0, BR: 702.9 ± 73.4 nM) were higher following ingestion of BR compared to PLA (both P < 0.01). VO2 was lower in the BR trial than in the PLA trial (PLA: 35.8 ± 1.4 ml kg min−1, BR: 34.6 ± 1.1 ml kg min−1, P = 0.02). There was no difference in either peak power output in the maximal sprints (P = 0.91) or TT performance between conditions (PLA: 4.6 ± 0.3 min, BR: 4.6 ± 0.3 min, P=0.91). Conclusion: In line with previous research, ingestion of BR reduced VO2 during submaximal kayak exercise although contrastingly had no impact on kayak TT performance. These differences may be attributed to the specific physiological demands of sprint kayaking.

KW - dietary nitrate

KW - physical activity

KW - kayak

KW - nitrate-rich beetroot juice

KW - oxygen cost

U2 - 10.1016/j.niox.2012.04.044

DO - 10.1016/j.niox.2012.04.044

M3 - Paper

SP - S12

ER -

Muggeridge DJ, Howe CCF, Spendiff O, Pedlar C, James PE, Easton C. The effect of dietary nitrate supplementation on performance in trained male flatwater kayakers. 2012. Paper presented at 7th INTERNATIONAL CONFERENCE ON THE BIOLOGY, CHEMISTRY AND THERAPEUTIC APPLICATION OF NITRIC OXIDE, Edinburgh, United Kingdom. https://doi.org/10.1016/j.niox.2012.04.044