Changes

<ref name="Givoni-1971"> {{Cite journal | last1 = Givoni | first1 = B. | last2 = Goldman | first2 = Givoni, RF. | title = Goldman, Predicting metabolic energy cost. | journal = , J Appl Physiol | , volume = 30 | , issue = 3 | , pages = 429-33 | month = , Mar | year = 1971 | doi = | , PMID = [http://www.ncbi.nlm.nih.gov/pubmed/5544128 5544128 }}]</ref><ref name="Minetti-2002"> {{Cite journal | last1 = Minetti | first1 = AE. | last2 = Moia | first2 = Minetti, C. | last3 = Roi | first3 = Moia, GS. | last4 = Susta | first4 = Roi, D. | last5 = Ferretti | first5 = Susta, G. | title = Ferretti, Energy cost of walking and running at extreme uphill and downhill slopes. | journal = , J Appl Physiol | , volume = 93 | , issue = 3 | , pages = 1039-46 | month = , Sep | year = 2002 | , doi = [http://dx.doi.org/10.1152/japplphysiol.01177.2001 10.1152/japplphysiol.01177.2001 | ], PMID = [http://www.ncbi.nlm.nih.gov/pubmed/12183501 12183501 }}]</ref><ref name="Rotstein-2005"> {{Cite journal | last1 = Rotstein | first1 = A. | last2 = Inbar | first2 = Rotstein, O. | last3 = Berginsky | first3 = Inbar, T. | last4 = Meckel | first4 = Berginsky, Y. | title = Meckel, Preferred transition speed between walking and running: effects of training status. | journal = , Med Sci Sports Exerc | , volume = 37 | , issue = 11 | , pages = 1864-70 | month = , Nov | year = 2005 | doi = | , PMID = [http://www.ncbi.nlm.nih.gov/pubmed/16286854 16286854 }}]</ref>