5-10 Years is a big range. In the last two years along it looks like he's slowed. It may be that his symptoms are more pronounced when he's been on camera but I think if his symptoms are getting worse because I'm starting to see them when he's holding the mitts. He might continue being a trainer but I don't think he will be able to continue holding the mitts for more that 2-3 years, but only if the symptoms are kept at bay.