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Study under review: Effect of sodium phosphate supplementation on repeated high-intensity cycling efforts
Phosphate doesn’t get much attention in the nutrition and supplement world, but it performs many important functions during exercise and everyday life. These include acting as an intracellular buffer and enabling the release of oxygen from hemoglobin. It also plays a critical role in energy production as a part of the basic structure of phosphocreatine and adenosine triphosphate (ATP). Phosphocreatine serves as an energy store that is available immediately during exercise, and can release energy without the need for oxygen. ATP contains three phosphate groups and is often referred to as the body’s energy currency.
Sodium phosphate has shown promise as an ergogenic aid for endurance athletes thanks to a growing body of research, though it is relatively unknown whether supplementation improves performance outside of a lab, in the context of the ever-changing demands of athletic competitions. Previous research has found improvements in maximal aerobic capacity (VO2 max) after supplementation, though mixed results have been found for lower intensity endurance performance.
The purpose of the study under review was to investigate the effects of sodium phosphate supplementation in a research setting that's a more realistic reflection of real-life cycling conditions (repeated maximal sprint and short time-trial efforts), after six days of sodium phosphate supplementation, as well as four days after stopping supplementation, to determine any lasting effects.
Other Articles in Issue #04 (February 2015)
Mood, dieting, and macros
Transient decrements in mood during energy deficit are independent of dietary protein-to-carbohydrate ratio.
- What If There Were No Dietary Guidelines?
The iPad Hangover
Evening use of light-emitting eReaders negatively affects sleep, circadian timing and next-morning alertness.
Can mice get cancer from steak?
A red meat-derived glycan promotes inflammation and cancer progression.
On the whey to getting lean: one more round of whey vs. soy
Whey supplements more efficiently stimulates protein synthesis during weight loss than does soy protein supplements.
It’s (not) all in your head: how sodium intake affects headaches
Effects of dietary sodium and DASH diet on the occurrence of headaches: results from randomised multicentre DASH-sodium clinical trial.
Diets, fast and slow
The effect of rate of weight loss on long-term weight management: a randomised controlled trial.
Is the glycemic index actually useful for making food choices?
Effects of high vs. low glycemic index of dietary carbohydrates on cardiovascular disease risk factors and insulin sensitivity.
- Interview: Ivan Oransky