Dietary Nitrate Supplementation Enhances Performance and Speeds Muscle Deoxyhaemoglobin Kinetics during an End-Sprint after Prolonged Moderate-Intensity Exercise
Short-term dietary nitrate (NO3−) supplementation has the potential to enhance performance during submaximal endurance, and short-duration, maximal-intensity exercise. However, it has yet to be determined whether NO3− supplementation before and during submaximal endurance exercise can improve performance during a short-duration, maximal-intensity end-sprint. In a randomised, double-blind, crossover study, 9 recreationally active men ingested NO3−-rich (BR: 8 mmol NO3−/day) and NO3−-depleted (PL: 0.75 mmol NO3−/day) beetroot powder for 7 days. On day 7, participants completed 2 h of moderate-intensity cycling, which immediately transitioned into a 60 s maximal-intensity end-sprint, with supplements ingested 2 h before and 1 h into the moderate-intensity exercise bout. Plasma [NO3−] and [NO2−] were higher in BR compared to PL pre- and post-exercise (p < 0.05). Post-exercise plasma [NO3−] was higher than pre-exercise (562 ± 89 µM vs. 300 ± 73 µM; p < 0.05) and plasma [NO2−] was not significantly different pre- (280 ± 58 nM) and post-exercise (228 ± 63 nM) in the BR condition (p > 0.05). Mean power output during the final 30 s of the end-sprint was greater after BR (390 ± 38 W) compared to PL (365 ± 41 W; p < 0.05). There were no differences between BR and PL in any muscle oxygenation variables during moderate-intensity cycling (p > 0.05), but muscle [deoxyhaemoglobin] kinetics was faster during the end-sprint in BR (6.5 ± 1.4 s) compared to PL (7.3 ± 1.4 s; p < 0.05). These findings suggest that NO3− supplementation has the potential to improve end-sprint performance in endurance events when ingested prior to and during exercise.
Medienart: |
E-Artikel |
---|
Erscheinungsjahr: |
2022 |
---|---|
Erschienen: |
2022 |
Enthalten in: |
Zur Gesamtaufnahme - volume:12 |
---|---|
Enthalten in: |
Antioxidants (Basel, Switzerland) - 12(2022), 1 vom: 23. Dez. |
Sprache: |
Englisch |
---|
Beteiligte Personen: |
Rowland, Samantha N [VerfasserIn] |
---|
Links: |
---|
Themen: |
Beetroot powder |
---|
Anmerkungen: |
Date Revised 08.03.2023 published: Electronic Citation Status PubMed-not-MEDLINE |
---|
doi: |
10.3390/antiox12010025 |
---|
funding: |
|
---|---|
Förderinstitution / Projekttitel: |
|
PPN (Katalog-ID): |
NLM351816119 |
---|
LEADER | 01000naa a22002652 4500 | ||
---|---|---|---|
001 | NLM351816119 | ||
003 | DE-627 | ||
005 | 20231226052302.0 | ||
007 | cr uuu---uuuuu | ||
008 | 231226s2022 xx |||||o 00| ||eng c | ||
024 | 7 | |a 10.3390/antiox12010025 |2 doi | |
028 | 5 | 2 | |a pubmed24n1172.xml |
035 | |a (DE-627)NLM351816119 | ||
035 | |a (NLM)36670889 | ||
035 | |a (PII)25 | ||
040 | |a DE-627 |b ger |c DE-627 |e rakwb | ||
041 | |a eng | ||
100 | 1 | |a Rowland, Samantha N |e verfasserin |4 aut | |
245 | 1 | 0 | |a Dietary Nitrate Supplementation Enhances Performance and Speeds Muscle Deoxyhaemoglobin Kinetics during an End-Sprint after Prolonged Moderate-Intensity Exercise |
264 | 1 | |c 2022 | |
336 | |a Text |b txt |2 rdacontent | ||
337 | |a ƒaComputermedien |b c |2 rdamedia | ||
338 | |a ƒa Online-Ressource |b cr |2 rdacarrier | ||
500 | |a Date Revised 08.03.2023 | ||
500 | |a published: Electronic | ||
500 | |a Citation Status PubMed-not-MEDLINE | ||
520 | |a Short-term dietary nitrate (NO3−) supplementation has the potential to enhance performance during submaximal endurance, and short-duration, maximal-intensity exercise. However, it has yet to be determined whether NO3− supplementation before and during submaximal endurance exercise can improve performance during a short-duration, maximal-intensity end-sprint. In a randomised, double-blind, crossover study, 9 recreationally active men ingested NO3−-rich (BR: 8 mmol NO3−/day) and NO3−-depleted (PL: 0.75 mmol NO3−/day) beetroot powder for 7 days. On day 7, participants completed 2 h of moderate-intensity cycling, which immediately transitioned into a 60 s maximal-intensity end-sprint, with supplements ingested 2 h before and 1 h into the moderate-intensity exercise bout. Plasma [NO3−] and [NO2−] were higher in BR compared to PL pre- and post-exercise (p < 0.05). Post-exercise plasma [NO3−] was higher than pre-exercise (562 ± 89 µM vs. 300 ± 73 µM; p < 0.05) and plasma [NO2−] was not significantly different pre- (280 ± 58 nM) and post-exercise (228 ± 63 nM) in the BR condition (p > 0.05). Mean power output during the final 30 s of the end-sprint was greater after BR (390 ± 38 W) compared to PL (365 ± 41 W; p < 0.05). There were no differences between BR and PL in any muscle oxygenation variables during moderate-intensity cycling (p > 0.05), but muscle [deoxyhaemoglobin] kinetics was faster during the end-sprint in BR (6.5 ± 1.4 s) compared to PL (7.3 ± 1.4 s; p < 0.05). These findings suggest that NO3− supplementation has the potential to improve end-sprint performance in endurance events when ingested prior to and during exercise | ||
650 | 4 | |a Journal Article | |
650 | 4 | |a beetroot powder | |
650 | 4 | |a exercise performance | |
650 | 4 | |a near-infrared spectroscopy | |
650 | 4 | |a nitric oxide | |
700 | 1 | |a Da Boit, Mariasole |e verfasserin |4 aut | |
700 | 1 | |a Tan, Rachel |e verfasserin |4 aut | |
700 | 1 | |a Robinson, George P |e verfasserin |4 aut | |
700 | 1 | |a O'Donnell, Emma |e verfasserin |4 aut | |
700 | 1 | |a James, Lewis J |e verfasserin |4 aut | |
700 | 1 | |a Bailey, Stephen J |e verfasserin |4 aut | |
773 | 0 | 8 | |i Enthalten in |t Antioxidants (Basel, Switzerland) |d 2012 |g 12(2022), 1 vom: 23. Dez. |w (DE-627)NLM256601127 |x 2076-3921 |7 nnns |
773 | 1 | 8 | |g volume:12 |g year:2022 |g number:1 |g day:23 |g month:12 |
856 | 4 | 0 | |u http://dx.doi.org/10.3390/antiox12010025 |3 Volltext |
912 | |a GBV_USEFLAG_A | ||
912 | |a GBV_NLM | ||
951 | |a AR | ||
952 | |d 12 |j 2022 |e 1 |b 23 |c 12 |