Jeff,
I have not tried them. I would not be afraid to either. As we age the importance of warming up muscles, and keeping them warm, is more important than ever. I've seen so many guys throw their first ball of the night with everything on it, instead of easing into the activity, so to speak. Then guess which guy is complaining mid-year of elbow pain, or wrist pain, and is forced into taking time off?
For me, I had to keep my reconstructed shoulder joint supported in two very specific areas. The KT tape helped with that. Believe me, I was a skeptic before trying it, too. A friend suggested it, and I literally decided "what do I have to lose?" Except my initial $15 investment... The product, when used skillfully, can help. When arbitrarily applied it may not.