I serged the bottom off about a foot to make them capri's! I also had to adjust the inside seam of the legs - they were a bit wider than I wanted with a weird flare starting past the knee.
I love my new pair of work out capri's. They've already been on some good morning runs outside and will be great for aerobics as well.
Now I just need to decide what to do with the other 2 pairs. I think I'll take the flare off one pair - leaving them as long pants for cold weather. The 3rd pair just might have to be another pair of carpri's :)