For one thing, the effects of altitude mean that the
heart has to work increasingly harder to keep the body supplied with oxygen.
On the highest glacier skiing in Europe, an altitude of 3,840 metres,
your heart will be working 61% harder than at sea level!
Secondly, a good level of cardio-respiratory fitness reduces the time taken
to recover from bouts of strenuous exercise, so that after a hike up a
ridge, skiers are more quickly ready to make their the descent.
For the majority of recreational skiers, the best way to develop
cardio-respiratory fitness is with prolonged bouts of moderate activity,
such as running, cycling or swimming, with each session lasting at least
20 minutes. Roller-blading is also a good skiing fitness training activity as it
uses similar muscles to skiing and is great for developing your balance.