Energy Expenditure Clinical Trial
Official title:
Workload of Water Polo Players Following a Phosphorus Manipulated High Carbohydrate Meal
Phosphorus is a widely used sport supplement. Most athletes who use it follow a phosphorus loading approach which consists of a weeklong phosphorus intake of 3-4 gr per day for optimal effect. The ergogenic potential of phosphorus is believed to be related to several factors including its ability to a) enhance ATP availability for energy expenditure and b) increase plasma content of 2.3-DPG (2.3-disphosphoglycerate) that is known to reduce oxygen affinity to hemoglobin and consequently enhances its release in the exercising tissue. Additionally, phosphorus was reported to increase peripheral glucose uptake and thus glycogenesis and glycogen storage. We have recently observed that the peripheral glucose uptake was stimulated by co-ingestion of phosphorus with meal, while pre ingestion failed to do so. Thus it is reasonable to postulate that phosphorus co-ingestion with meal improves ergogenesis through enhancing glycogen storage. The aim of this experiment is to investigate whether acute phosphate supplementation of a glucose load is responsible for the performance enhancement. This may help in explaining the controversies surrounding the impact of phosphorus on performance. A cross over study will be conducted on water polo players. In brief, overnight fasted subjects, will be given glucose load with or without phosphorus. Three hours later their performance will be measured using an ergometer cycling machine.
Status | Recruiting |
Enrollment | 17 |
Est. completion date | March 24, 2018 |
Est. primary completion date | March 24, 2018 |
Accepts healthy volunteers | Accepts Healthy Volunteers |
Gender | Male |
Age group | 18 Years to 25 Years |
Eligibility |
Inclusion Criteria: - water polo player Exclusion Criteria: |
Country | Name | City | State |
---|---|---|---|
Lebanon | American University of Beirut | Beirut |
Lead Sponsor | Collaborator |
---|---|
American University of Beirut Medical Center |
Lebanon,
Buck CL, Wallman KE, Dawson B, Guelfi KJ. Sodium phosphate as an ergogenic aid. Sports Med. 2013 Jun;43(6):425-35. doi: 10.1007/s40279-013-0042-0. Review. — View Citation
Chasiotis D. Role of cyclic AMP and inorganic phosphate in the regulation of muscle glycogenolysis during exercise. Med Sci Sports Exerc. 1988 Dec;20(6):545-50. — View Citation
Czuba M, Zajac A, Poprzecki S, Cholewa J, Woska S. Effects of Sodium Phosphate Loading on Aerobic Power and Capacity in off Road Cyclists. J Sports Sci Med. 2009 Dec 1;8(4):591-9. eCollection 2009. — View Citation
Di Caprio G, Stokes C, Higgins JM, Schonbrun E. Single-cell measurement of red blood cell oxygen affinity. Proc Natl Acad Sci U S A. 2015 Aug 11;112(32):9984-9. doi: 10.1073/pnas.1509252112. Epub 2015 Jul 27. — View Citation
Finta KM, Rocchini AP, Moorehead C, Key J, Katch V. Urine sodium excretion in response to an oral glucose tolerance test in obese and nonobese adolescents. Pediatrics. 1992 Sep;90(3):442-6. — View Citation
Folland JP, Stern R, Brickley G. Sodium phosphate loading improves laboratory cycling time-trial performance in trained cyclists. J Sci Med Sport. 2008 Sep;11(5):464-8. Epub 2007 Jun 14. — View Citation
Galloway SD, Tremblay MS, Sexsmith JR, Roberts CJ. The effects of acute phosphate supplementation in subjects of different aerobic fitness levels. Eur J Appl Physiol Occup Physiol. 1996;72(3):224-30. — View Citation
Khattab M, Abi-Rashed C, Ghattas H, Hlais S, Obeid O. Phosphorus ingestion improves oral glucose tolerance of healthy male subjects: a crossover experiment. Nutr J. 2015 Oct 29;14:112. doi: 10.1186/s12937-015-0101-5. — View Citation
Kopec BJ, Dawson BT, Buck C, Wallman KE. Effects of sodium phosphate and caffeine ingestion on repeated-sprint ability in male athletes. J Sci Med Sport. 2016 Mar;19(3):272-6. doi: 10.1016/j.jsams.2015.04.001. Epub 2015 Apr 24. — View Citation
Lichtman MA, Miller DR, Cohen J, Waterhouse C. Reduced red cell glycolysis, 2, 3-diphosphoglycerate and adenosine triphosphate concentration, and increased hemoglobin-oxygen affinity caused by hypophosphatemia. Ann Intern Med. 1971 Apr;74(4):562-8. — View Citation
Rauch HG, St Clair Gibson A, Lambert EV, Noakes TD. A signalling role for muscle glycogen in the regulation of pace during prolonged exercise. Br J Sports Med. 2005 Jan;39(1):34-8. — View Citation
Xie W, Tran TL, Finegood DT, van de Werve G. Dietary P(i) deprivation in rats affects liver cAMP, glycogen, key steps of gluconeogenesis and glucose production. Biochem J. 2000 Nov 15;352 Pt 1:227-32. — View Citation
* Note: There are 12 references in all — Click here to view all references
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | workload or performance enhancement or METs | power (watt) and time to exhaustion | up to 40 min |
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