1.   Altitude training helps swimmers prepare for competition at sea level. . .

2.   A critical period of altitude training had begun.

3.   He had also come to the volcano for his weekly altitude training.

4.   I do believe he has to get some altitude training in Albuquerque.

5.   Not everyone, however, agrees on the positive effects of altitude training.

6.   Once word of mouth circulated about the solitude of training in Big Bear, and the benefits of high altitude training, fighters flocked to this mountain resort.

7.   Over Christmas, he went to Colorado Springs for altitude training, and even with his asthma, was delivering faster workouts than he had at sea level.

8.   Other athletes tried for a legal advantage, from altitude training to vegetarian diets to chiropractors.

9.   Still, he persevered through a winter of hard altitude training in Albuquerque, N.N., and Mexico City.

10.   They hear about high altitude training, about the serenity.