Question

select the word that means increase. olympic athletes train hard so they can boost their performance and bring home gold medals. to get ready for the 2014 winter olympics in russia, many nations went a step further: they developed high - tech devices to help their athletes train. technologies such as 3d glasses, sensors, and special treadmills were used to help athletes during their training.

Explanation:

The word "boost" in the context of athletes improving their performance means to increase.

Answer:

boost