How is your current fitness level?  If you can't peel an orange without breaking a sweat, then it's probably not so good!  But if you're an avid skier then chances are you're more fit than most people, since of course you need to be in great shape to hit the slopes regularly.
Your level of fitness will determine the effectiveness of your skiing.
  Those that aren't very fit will need to rest more often and may lack the muscle tone and aerobic strength needed to hit the larger and more difficult slopes.
  One mistake that many skiers - and many people, for that matter - make is to assume that their fitness levels are just "set" or inherent.
  But in truth, your fitness levels are more determined by your own actions than you may realize.
To take your fitness to the next level and really carve through the powder like the pros, consider two quick but very important points when it comes to your workouts.
Increasing the Duration How long do you jog or bike ride or do whatever else it is that keeps you physically fit?  If you've been doing the same routine for years then you may be stuck at your current fitness levels because your body is no longer being challenged.
Many individuals work out until they become winded or tired and then call it quits.
  However this doesn't really push your body and give it the workout you need.
  Your muscles and your aerobic base are as trained as they'll ever be if you never increase the duration of your workouts.
Of course you want to be safe and should never train to the point of exhaustion or nausea, but chances are you can increase your workouts by ten minutes each time this week, then fifteen minutes next week, and so on.
  You can also add in less intensive workouts that help you to increase the duration; if you're already jogging as long as you can, add in a fifteen minute walk afterwards.
  If you follow an aerobics class, get on an exercise bike for ten minutes when you're done.
Mixing it Up Another great way to ratchet up the fitness levels is to mix up your workouts.
  Add in challenging exercises and routines that you don't currently use.
  This will mean working muscles that aren't so well-trained so that your body actually works harder for these routines.
Some good exercise routines that will take your fitness to the next level and that will also train the muscles needed for skiing include boxing, martial arts, step aerobics, skating or rollerblading, swimming, jumping rope, and playing sports.
Adding in these exercises to your normal routine will ensure that your fitness levels are at their peak.
  You'll train your muscles and your aerobic base and will soon realize that you're tearing through the powder as well as any well-trained athlete - because that's exactly what you'll be!