The Effects of Sodium Phosphate Supplementation on Physiological Responses to Submaximal Exercise and 20 km Cycling Time-Trial Performance.
The aim of this study was to examine the effects of sodium phosphate (SP) supplementation on physiological responses to submaximal exercise and 20 km cycling time-trial performance. Using a randomized, double-blind, crossover design, 20 endurance-trained male cyclists (age: 31 ± 6 years; height: 1.8...
| Published in: | Journal of Dietary Supplements Vol. 16; no. 5; pp. 564 - 576 |
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| Main Authors: | , |
| Format: | research tables/charts Journal Article |
| Published: |
Taylor & Francis Ltd
2019
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| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=138250582&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 138250582 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 19390211 2Y62 jtl: Journal of Dietary Supplements issn: 19390211 maglogo: N pubinfo: dt: 2019 vid: 16 iid: 5 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 138250582 138250582 138250582 10.1080/19390211.2018.1472708 138250582 ppf: 564 ppct: 12 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: The Effects of Sodium Phosphate Supplementation on Physiological Responses to Submaximal Exercise and 20 km Cycling Time-Trial Performance. aug: au: Brown, Jack Alexander Glaister, Mark affil: School of Sport, Health, and Applied Sciences, St. Mary's University, Strawberry Hill, Twickenham, UK sug: subj: Sodium Compounds Pharmacodynamics Phosphates Pharmacodynamics Exercise Physiology Drug Effects Exercise Intensity Cycling Dietary Supplementation Athletic Performance Evaluation Human Athletes Male Adult Body Height Evaluation Body Weight Evaluation Oxygen Consumption Evaluation Respiration Evaluation Heart Rate Evaluation Lactates Blood Fat Free Mass Confidence Intervals Adult: 19-44 years Male ab: The aim of this study was to examine the effects of sodium phosphate (SP) supplementation on physiological responses to submaximal exercise and 20 km cycling time-trial performance. Using a randomized, double-blind, crossover design, 20 endurance-trained male cyclists (age: 31 ± 6 years; height: 1.82 ± 0.07 m; body mass: 76.3 ± 7.0 kg; maximal oxygen uptake [V̇O2max]: 57.9 ± 5.5 mL·kg−1·min−1) completed two supplementation trials separated by a 14-day washout period. The trials consisted of 10 minutes of cycling at 65% V̇O2max followed by a 20 km time trial. Expired air was monitored throughout each trial for the evaluation of V̇O2, minute ventilation (V̇E), and respiratory exchange ratio (RER). Heart rate was monitored during each trial along with ratings of perceived exertion (RPE) and blood lactate concentration. For four days before each trial, participants ingested 50 mg·kg fat-free mass−1·day−1 of either SP or placebo. There were no effects (p ≥.05) of supplementation on physiological responses during cycling at 65% V̇O2max. There were also no effects of supplementation on time-trial performance (placebo: 32.8 ± 2.2 min; SP: 32.8 ± 2.3 min). Nevertheless, relative to placebo, SP increased V̇E (mean difference: 3.81 L·min−1; 95% confidence interval: [0.16, 7.46 L·min−1]), RER (mean difference: 0.020; 95% confidence interval: [0.004, 0.036]), and RPE (mean difference: 0.39; 95% confidence interval: [0.04, 0.73]) during time trials, as well as post time-trial blood lactate concentration (mean difference: 1.06 mmol·L−1; 95% confidence interval: [0.31, 1.80 mmol·L−1]). In conclusion, SP supplementation has no significant effects on submaximal physiological responses or 20 km time-trial performance. pubtype: Academic Journal doctype: research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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