Try to think exercise as fun movement. Listen to music or a book, talk to a friend on the phone or do it with someone else. Think about it as strengthening your muscles while lowering your BG. For some people it helps to think about exercise as your medication for prediabetes. It is low cost, has very few side effects, and it can often be effective like taking pills!
Experiment to see what might be fun- turn on music and dance, go for a hike, try new things!