Like Viagra for your legs.
I had spoken to a quite a few people who had tried these and they gave them rave reviews.
As long as they don't grow a third testicle or any additional hair on my back I think we have a winner here folks. Oh, wait.. That didn't sound right. My testicles are hairless and not on my back. As long as they stay that way I'll be happy.
When I think of lactate I think of something dripping out of a boob. I once knew of a guy in college who had lactating nipples. Weird.
I actually bought them for my wife when she does her half marathons. She was so impressed with them that I started using them for mountaineering.