8,099
edits
Changes
From Fellrnr.com, Running tips
no edit summary
==Digestive Path==
While fructose has a low isotonic concentration and a low glycemic index, it can be absorbed via a different path ([http://en.wikipedia.org/wiki/GLUT5 GLUT5]) to glucose and Maltodextrin ([http://en.wikipedia.org/wiki/GLUT2 GLUT2]). This means that if you have enough glucose or Maltodextrin to saturate that absorption path, adding fructose will improve the overall usage of the carbohydrate intake<ref name="Rowlands-2008"/>.
==Optimal Carbohydrate Intake==
Most studies have shown that glucose and Maltodextrin can be absorbed and metabolized at up to 1.0 grams/minute, while Fructose is absorbed and metabolized at up to 0.6 grams/minute<ref name="Jeukendrup2004"/>. Combining Fructose with glucose/Maltodextrin can result in the metabolism of up to 1.75 grams/minute<ref name="Jeukendrup2010">.
=Ingredient Analysis=
Here is an analysis of the most common ingredients
=Viscosity=
[[File:Gel Viscosity.JPG|right|thumb|200px|The funnel and measure used to test the viscosity of gels.]]
=References=
<references>
<ref name="JacksonTaylor2012">Brian P. Jackson, Vivien F. Taylor, Margaret R. Karagas, Tracy Punshon, Kathryn L. Cottingham, Arsenic, Organic Foods, and Brown Rice Syrup, Environmental Health Perspectives, volume 120, issue 5, 2012, pages 623–626, ISSN [http://www.worldcat.org/issn/0091-6765 0091-6765], doi [http://dx.doi.org/10.1289/ehp.1104619 10.1289/ehp.1104619]</ref>
<ref name="Sweetness">Sweetness http://biology.clc.uc.edu/courses/bio104/carbohydrates.htm</ref>
<ref name="Jeukendrup2004">Asker E Jeukendrup, Carbohydrate intake during exercise and performance, Nutrition, volume 20, issue 7-8, 2004, pages 669–677, ISSN [http://www.worldcat.org/issn/08999007 08999007], doi [http://dx.doi.org/10.1016/j.nut.2004.04.017 10.1016/j.nut.2004.04.017]</ref>
<ref name="Jeukendrup2010">Asker E Jeukendrup, Carbohydrate and exercise performance: the role of multiple transportable carbohydrates, Current Opinion in Clinical Nutrition and Metabolic Care, volume 13, issue 4, 2010, pages 452–457, ISSN [http://www.worldcat.org/issn/1363-1950 1363-1950], doi [http://dx.doi.org/10.1097/MCO.0b013e328339de9f 10.1097/MCO.0b013e328339de9f]</ref>
<ref name="Van Thienen-2009"> R. Van Thienen, K. Van Proeyen, B. Vanden Eynde, J. Puype, T. Lefere, P. Hespel, Beta-alanine improves sprint performance in endurance cycling., Med Sci Sports Exerc, volume 41, issue 4, pages 898-903, Apr 2009, doi [http://dx.doi.org/10.1249/MSS.0b013e31818db708 10.1249/MSS.0b013e31818db708], PMID [http://www.ncbi.nlm.nih.gov/pubmed/19276843 19276843]</ref>
<ref name="Hoffman-2008"> JR. Hoffman, NA. Ratamess, AD. Faigenbaum, R. Ross, J. Kang, JR. Stout, JA. Wise, Short-duration beta-alanine supplementation increases training volume and reduces subjective feelings of fatigue in college football players., Nutr Res, volume 28, issue 1, pages 31-5, Jan 2008, doi [http://dx.doi.org/10.1016/j.nutres.2007.11.004 10.1016/j.nutres.2007.11.004], PMID [http://www.ncbi.nlm.nih.gov/pubmed/19083385 19083385]</ref>
