1. Ainsworth, BE, Haskell, WL, Whitt, MC, Irwin, ML, Swartz, AM, Strath, SJ, OBrien, WL, Bassett, DR Jr, Schmitz, KH, Emplaincourt, PO, Jacobs, DR Jr, and Leon, AS. Compendium of physical activities: An update of activity codes and MET intensities.;Med Sci Sports Exerc,2000
2. Cavagna, GA, Heglund, NC, and Taylor, CR. Mechanical work in terrestrial locomotion: Two basic mechanisms for minimizing energy expenditure.;Am J Physiol,1977
3. Cavagna, GA, Saibene, FP, and Margaria, R. External work in walking.;J Appl Physiol,1963
4. Church, TS, Earnest, CP, and Morss, GM. Field testing of physiological responses associated with Nordic Walking.;Res Q Exerc Sport,2002
5. Marko. Nordic Fitness Magazine.;June/July:,2005