Effect of Potassium Phosphate Supplementation on Perceptual and Physiological Responses to Maximal Graded Exercise

Goss, Fredric L.; Robertson, Robert J.; Riechman, Steven E.; Zoeller, Robert F.; Dabayebeh, Ibrahim; Moyna, Niall M.; Boer, Nicholas F.; Peoples, Jennifer; Metz, Kenneth F.

doi:10.1123/ijsnem.11.1.53

Cited by 13 publications

(7 citation statements)

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“…An older study comparing two days of potassium phosphate (PP) loading (4 g·day −1 ) to placebo in highly-trained endurance runners (crossover n = 8) showed that PP may reduce the rate of perceived exertion (RPE) during the mid-stages of maximal treadmill running, although no changes in physiological parameters were identified. This may be due to the short loading phase [134]. Others have shown that SP loading (4 g) over three days improved VO 2peak in elite endurance athletes by ~9%, increased blood haematocrit levels, glucose and other markers of metabolic demand [135].…”

Section: Discussionmentioning

confidence: 99%

The Role of Mineral and Trace Element Supplementation in Exercise and Athletic Performance: A Systematic Review

et al. 2019

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Minerals and trace elements (MTEs) are micronutrients involved in hundreds of biological processes. Deficiency in MTEs can negatively affect athletic performance. Approximately 50% of athletes have reported consuming some form of micronutrient supplement; however, there is limited data confirming their efficacy for improving performance. The aim of this study was to systematically review the role of MTEs in exercise and athletic performance. Six electronic databases and grey literature sources (MEDLINE; EMBASE; CINAHL and SportDISCUS; Web of Science and clinicaltrials.gov) were searched, in accordance with PRISMA guidelines. Results: 17,433 articles were identified and 130 experiments from 128 studies were included. Retrieved articles included Iron (n = 29), Calcium (n = 11), Magnesium, (n = 22), Phosphate (n = 17), Zinc (n = 9), Sodium (n = 15), Boron (n = 4), Selenium (n = 5), Chromium (n = 12) and multi-mineral articles (n = 5). No relevant articles were identified for Copper, Manganese, Iodine, Nickel, Fluoride or Cobalt. Only Iron and Magnesium included articles of sufficient quality to be assigned as ‘strong’. Currently, there is little evidence to support the use of MTE supplementation to improve physiological markers of athletic performance, with the possible exception of Iron (in particular, biological situations) and Magnesium as these currently have the strongest quality evidence. Regardless, some MTEs may possess the potential to improve athletic performance, but more high quality research is required before support for these MTEs can be given. PROSPERO preregistered (CRD42018090502).

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Section: Discussionmentioning

confidence: 99%

The Role of Mineral and Trace Element Supplementation in Exercise and Athletic Performance: A Systematic Review

et al. 2019

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“…This number was determined using a G-power analysis (Faul, Erdfekder, Buchner, & Lang, 2009), based on an effect size of 1.1 (Goss et al, 2001), with an alpha level of 0.05% and 85% power. Participants were not taking any nutritional supplements for at least 2 months prior to or during this study.…”

Section: Participantsmentioning

confidence: 99%

Effects of sodium phosphate and caffeine loading on repeated-sprint ability

Buck

Guelfi

Dawson

et al. 2015

Journal of Sports Sciences

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The effects of sodium phosphate and caffeine supplementation were assessed on repeated-sprint ability. Using a randomised, double-blind, Latin-square design, 12 female, team-sport players participated in four trials: (1) sodium phosphate and caffeine, (2) sodium phosphate and placebo (for caffeine), (3) caffeine and placebo (for sodium phosphate) and (4) placebo (for sodium phosphate and caffeine), with ~21 days separating each trial. After each trial, participants performed a simulated team-game circuit (4 × 15 min quarters) with 6 × 20-m repeated-sprints performed once before (Set 1), at half-time (Set 2), and after end (Set 3). Total sprint times were faster after sodium phosphate and caffeine supplementation compared with placebo (Set 1: P = 0.003; Set 2: d = -0.51; Set 3: P < 0.001; overall: P = 0.020), caffeine (Set 3: P = 0.004; overall: P = 0.033) and sodium phosphate (Set 3: d = -0.67). Furthermore, total sprint times were faster after sodium phosphate supplementation compared with placebo (Set 1: d = -0.52; Set 3: d = -0.58). Best sprint results were faster after sodium phosphate and caffeine supplementation compared with placebo (Set 3: P = 0.007, d = -0.90) and caffeine (Set 3: P = 0.024, d = -0.73). Best sprint times were also faster after sodium phosphate supplementation compared with placebo (d = -0.54 to -0.61 for all sets). Sodium phosphate and combined sodium phosphate and caffeine loading improved repeated-sprint ability.

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“…However, in the case of repeated sprints, the magnitude of benefit has been shown to be varied and unclear (Kopec et al, 2016). Finally, there is also a large amount of contrary evidence from the same physiological and performance measures that suggests phosphate supplementation (in isolation, or in combination with other buffer agents) has no impact on exercise capacity or performance outcomes (Brewer et al, 2014;Goss et al, 2001;Kraemer et al, 1995;West et al, 2012). No doubt, the lack of clear consensus defined by this collective work is explained by variations in the supplement protocol used (i.e., differences in dose, type, exercise protocol, etc.)…”

Section: Phosphatesmentioning

confidence: 99%

Evidence-Based Supplements for the Enhancement of Athletic Performance

Peeling

Binnie

Goods³

et al. 2018

International Journal of Sport Nutrition and Exercise Metabolism

127

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A strong foundation in physical conditioning and sport-specific experience, in addition to a bespoke and periodized training and nutrition program, are essential for athlete development. Once these underpinning factors are accounted for, and the athlete reaches a training maturity and competition level where marginal gains determine success, a role may exist for the use of evidence-based performance supplements. However, it is important that any decisions surrounding performance supplements are made in consideration of robust information that suggests the use of a product is safe, legal, and effective. The following review focuses on the current evidence-base for a number of common (and emerging) performance supplements used in sport. The supplements discussed here are separated into three categories based on the level of evidence supporting their use for enhancing sports performance: (1) established (caffeine, creatine, nitrate, beta-alanine, bicarbonate); (2) equivocal (citrate, phosphate, carnitine); and (3) developing. Within each section, the relevant performance type, the potential mechanisms of action, and the most common protocols used in the supplement dosing schedule are summarized.

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Effect of Potassium Phosphate Supplementation on Perceptual and Physiological Responses to Maximal Graded Exercise

Cited by 13 publications

References 0 publications

The Role of Mineral and Trace Element Supplementation in Exercise and Athletic Performance: A Systematic Review

The Role of Mineral and Trace Element Supplementation in Exercise and Athletic Performance: A Systematic Review

Effects of sodium phosphate and caffeine loading on repeated-sprint ability

Evidence-Based Supplements for the Enhancement of Athletic Performance

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