"sour muscles" refer to milk-acid build up in them.... from working too hard, and not going through a cool-down phase to get rid of the acid...
verry true, sour muscles, in popular dutch "stijfheid van de spier" (stiff muscles) but infact the feeling of stiffness comes along with sourness, you'll feel it even if you don't use those muscles they become sore by using them while beeing sour.
Tip to viper, next time, drink a lot of water or drink some rehydrating stuff like aqarius. Not only will it decrease chances on sour muscles and sore muscles afterwards, keeping yourself well hydrated will keep your performance up for longer. (less fatigue)
So everyone who's planning to go skiing or is sure of it, even if think you won't be thirsty (cold weather), have water with you and drink regulary. Skiing is very demanding on the legs mucles. Keep your hydration up, less chance on hurting yourself (even braking legs is somewhat prevented) or having sour muscles afterwards.
