His schedule is 'grueling'.
a 'grueling' race
(..) a chance to scavenge. The worst of the blizzard brings success for the snow leopard, but having descended so far to make the kill she has a grueling climb to get back to her lair. The cub must be patient. It'll be a year before it has the strength and skill to kill for itself (..)2006 TvShow: Planet Earth Title: Mountains Season: 1 Episode 2