Kris Humphries -- It's Not What You Think

Kris Humphries was once again spotted on the beach in Miami with a mystery girl ... but TMZ has already cracked the mystery.

The girl is Kris' nutritionist, Tracy Paradise, and we're told there is absolutely nothing romantic between the two. Our sources say she works Kris out when his other trainers are not available (not like that, you pervs) and sometimes serves as his assistant.