altitude training

例句：

1. 1.This altitude training program is designed to help athletes prepare for high-altitude competitions.
   这个高海拔训练计划旨在帮助运动员为高海拔比赛做准备。
2. 2. During the training, the athletes are required to acclimatize to the altitude by climbing up and down in the mountains.
   在训练期间，运动员被要求通过在山区上下爬来适应高海拔。
3. 3. The altitude training helps improve the cardiovascular system and enhances overall physical fitness.
   高海拔训练有助于改善心血管系统并提高整体身体素质。