Compendium of physical activities: an update of activity codes and MET intensities - Ainsworth, B E; Haskell, W L; Whitt, M C; Irwin, M L; Swartz, A M; Strath, S J; O’Brien, W L; Bassett, D R, Jr; Schmitz, K H; Emplaincourt, P O; Jacobs, D R, Jr; Leon, A S (Med Sci Sports Exerc, 2000)