Effects of Beetroot Juice on Recovery of Muscle Function and Performance between Bouts of Repeated Sprint Exercise
-
- Tom Clifford
- Faculty of Health and Life Sciences, Department of Sport, Exercise & Rehabilitation, Northumbria University, Newcastle NE1 8ST, UK
-
- Bram Berntzen
- Faculty of Health Medicine and Life Sciences, Maastricht University, Maastricht 6211 LK, The Netherlands
-
- Gareth Davison
- Sport and Exercise Sciences Research Institute, Ulster University, Ulster BT52 1SA, Northern Ireland, UK
-
- Daniel West
- Human Nutrition Research Centre, Institute of Cellular Medicine, Newcastle University, Newcastle NE2 4HH, UK
-
- Glyn Howatson
- Faculty of Health and Life Sciences, Department of Sport, Exercise & Rehabilitation, Northumbria University, Newcastle NE1 8ST, UK
-
- Emma Stevenson
- Human Nutrition Research Centre, Institute of Cellular Medicine, Newcastle University, Newcastle NE2 4HH, UK
書誌事項
- 公開日
- 2016-08-18
- 権利情報
-
- https://creativecommons.org/licenses/by/4.0/
- DOI
-
- 10.3390/nu8080506
- 公開者
- MDPI AG
説明
<jats:p>This study examined the effects of beetroot juice (BTJ) on recovery between two repeated-sprint tests. In an independent groups design, 20 male, team-sports players were randomized to receive either BTJ or a placebo (PLA) (2 × 250 mL) for 3 days after an initial repeated sprint test (20 × 30 m; RST1) and after a second repeated sprint test (RST2), performed 72 h later. Maximal isometric voluntary contractions (MIVC), countermovement jumps (CMJ), reactive strength index (RI), pressure-pain threshold (PPT), creatine kinase (CK), C-reactive protein (hs-CRP), protein carbonyls (PC), lipid hydroperoxides (LOOH) and the ascorbyl free radical (A•−) were measured before, after, and at set times between RST1 and RST2. CMJ and RI recovered quicker in BTJ compared to PLA after RST1: at 72 h post, CMJ and RI were 7.6% and 13.8% higher in BTJ vs. PLA, respectively (p < 0.05). PPT was 10.4% higher in BTJ compared to PLA 24 h post RST2 (p = 0.012) but similar at other time points. No group differences were detected for mean and fastest sprint time or fatigue index. MIVC, or the biochemical markers measured (p > 0.05). BTJ reduced the decrement in CMJ and RI following and RST but had no effect on sprint performance or oxidative stress.</jats:p>
収録刊行物
-
- Nutrients
-
Nutrients 8 (8), 506-, 2016-08-18
MDPI AG