RFO -- Thanks!! These are some great links and thoughts. There's a lot here to study and try out. I poked around on the plyometrics site; lots of drills I can start now. Also, I read that NYT article when it first came out and had intended to clip it out, but it got recycled before I could -- so thanks for giving me the link.
I like the idea of "full body" sport. The closest I have to that now is mountain biking, but even with that my upper torso only gets a real work-out on gnarly single-track. A lot of my current sports presume that the upper torso is in shape -- tennis, skiing, baseball, biking -- but do not actually provide a full upper torso workout. Hence, up til now, the stationary weights. But you've inspired me; when I hit the gym this afternoon I'm going to try those plyometric heavy ball drills.
Also, I saw in one of the links a blurb on active stretching. My son's cross country coach swears by this -- he makes the whole team do active stretching after a 1-mile warm-up run. I need to start doing this, after 40 years of exclusively static stretching.
I'll keep you posted as I explore these. Thanks again.