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Influence of equimolar doses of beetroot juice and sodium nitrate on time trial performance in handcycling


Flueck, Joelle Leonie; Gallo, Alessandro; Moelijker, Nynke; Bogdanov, Nikolay; Bogdanova, Anna; Perret, Claudio (2019). Influence of equimolar doses of beetroot juice and sodium nitrate on time trial performance in handcycling. Nutrients, 11(7):E1642.

Abstract

This study aimed to investigate the influence of a single dose of either beetroot juice (BR) or sodium nitrate (NIT) on performance in a 10 km handcycling time trial (TT) in able-bodied individuals and paracyclists. In total, 14 able-bodied individuals [mean ± SD; age: 28 ± 7 years, height: 183 ± 5 cm, body mass (BM): 82 ± 9 kg, peak oxygen consumption (VO): 33.9 ± 4.2 mL/min/kg] and eight paracyclists (age: 40 ± 11 years, height: 176 ± 9cm, BM: 65 ± 9 kg, VO: 38.6 ± 10.5 mL/min/kg) participated in the study. All participants had to perform three TT on different days, receiving either 6 mmol nitrate as BR or NIT or water as a placebo. Time-to-complete the TT, power output (PO), as well as oxygen uptake (VO) were measured. No significant differences in time-to-complete the TT were found between the three interventions in able-bodied individuals ( = 0.80) or in paracyclists ( = 0.61). Furthermore, VO was not significantly changed after the ingestion of BR or NIT in either group ( < 0.05). The PO to VO ratio was significantly higher in some kilometers of the TT in able-bodied individuals ( < 0.05). The ingestion of BR or NIT did not increase handcycling performance in able-bodied individuals or in paracyclists.

Abstract

This study aimed to investigate the influence of a single dose of either beetroot juice (BR) or sodium nitrate (NIT) on performance in a 10 km handcycling time trial (TT) in able-bodied individuals and paracyclists. In total, 14 able-bodied individuals [mean ± SD; age: 28 ± 7 years, height: 183 ± 5 cm, body mass (BM): 82 ± 9 kg, peak oxygen consumption (VO): 33.9 ± 4.2 mL/min/kg] and eight paracyclists (age: 40 ± 11 years, height: 176 ± 9cm, BM: 65 ± 9 kg, VO: 38.6 ± 10.5 mL/min/kg) participated in the study. All participants had to perform three TT on different days, receiving either 6 mmol nitrate as BR or NIT or water as a placebo. Time-to-complete the TT, power output (PO), as well as oxygen uptake (VO) were measured. No significant differences in time-to-complete the TT were found between the three interventions in able-bodied individuals ( = 0.80) or in paracyclists ( = 0.61). Furthermore, VO was not significantly changed after the ingestion of BR or NIT in either group ( < 0.05). The PO to VO ratio was significantly higher in some kilometers of the TT in able-bodied individuals ( < 0.05). The ingestion of BR or NIT did not increase handcycling performance in able-bodied individuals or in paracyclists.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Center for Integrative Human Physiology
05 Vetsuisse Faculty > Institute of Veterinary Physiology
Dewey Decimal Classification:570 Life sciences; biology
Scopus Subject Areas:Life Sciences > Food Science
Health Sciences > Nutrition and Dietetics
Uncontrolled Keywords:Paralympic; sports nutrition; supplementation
Language:English
Date:18 July 2019
Deposited On:31 Jul 2019 11:29
Last Modified:15 Apr 2020 23:56
Publisher:MDPI Publishing
ISSN:2072-6643
OA Status:Gold
Free access at:PubMed ID. An embargo period may apply.
Publisher DOI:https://doi.org/10.3390/nu11071642
PubMed ID:31323779
Project Information:
  • : FunderH2020
  • : Grant ID675115
  • : Project TitleRegulation of red cell life-span, erythropoiesis, survival, senescence and clearance

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