Most people don't think about plyometrics when they think about powerful strength. But I do lots of them to build mine.
If you're doing Plyometrics you can jump higher and run faster and your heart and lungs are going to kick the panties off of anybody else that tries to get out there without it.
My girlfriends and I just started doing plyometrics. It's a killer - it hurts so much. But when you walk out of there, you're like, 'I can't believe I just did that and my body looks this good.