'Amazing Race' Bikini Model Training with Boxing Champ ... What a Knockout!

3/26/2017 12:25 AM PDT

'Amazing Race' Bikini Model Trains with Boxing Champ

EXCLUSIVE

One of the smoking hot models on "Amazing Race" knew she needed to toughen up for the show -- so she got in the ring with boxing champ Victor Ortiz

Jenn Lee (see bikini pics below) says she hooked up with Ortiz back in June to work on her strength and conditioning for the race around the world ... and it paid off in a big way. 

In fact, she's STILL training with the guy even though the show's in the can ... because, as it turns out, boxing training is great training for bikini season. 

Not that she really needed the help ...