My favorite line is: I work in healthcare, and I'm concerned your helmet might not be set properly. Can I help you for a second?
You could have one like: I do a lot with bike racing, and I'm concerned...
in a strictly literal sense I could say both.... my positions have never been clinical, but except for about 3 years, I have (and am now back to) worked in healthcare since I graduated college
"Sharing the road means getting along, not getting ahead" - 1994 Washington State Driver's Guide