Compendium of physical activities: A second update of codes and MET values - 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; Schmitz, K H; Emplaincourt, P O; Jacobs, D R; Leon, A S (Med Sci Sports Exerc, 2011)