Kate Upton

Kate Upton's trainer, Ben Bruno, tells People Magazine that the supermodel's "workouts are not for the faint of heart."

Here's Upton knocking out a set of weighted hip thrusts at 200 pounds to illustrate his point:

If you didn't already think Justin Verlander was a lucky man ...

Related Story: Burn Fat Fast And Carve Your Core In This 15-Minute Workout