HOLLYWOOD, Calif. — Kendra Wilkinson is getting sick of looking at her scale.

"I get so mad at how hard I'm working out, and I look good, but it's not showing on the numbers," the 25-year-old reality star tells OK! magazine. "I'm like 'dang it!' Right now I feel like I've lost – and I look in the mirror like I've lost so much – but on the scale, it's not telling me that."

So when was the last time Wilkinson worked out? Well, not including as a mother to her 8-month-old son, Hank IV.

"The last time I worked out – a real good workout — was probably a week ago," she confesses. "A good week ago. Yeah. But I call going up and down the stairs with the baby a workout. That was today. A week ago was a good workout with my trainer.

"I have a treadmill at my house, and some weights and all that. He put me on a 10% incline and made me sprint up because I love just getting it done. I love sweating and burning those calories. I don't like to just walk, walk, walk. I like to get my heart rate up, and burn those calories. We also popped in my workout DVD, and I worked out to myself."

When it comes to regaining her pre-baby figure, Wilkinson does have one advantage - she no longer craves Papa John's after working at the pizza chain years ago.

"I think I ate it one time after I worked there," she tells the mag. "Just one time, and that was it. It's like a phobia now because the smell that was on my hands. I get really grossed out when I think of that pizza because I had to work with the pizza."

Also see: Kendra Wilkinson Photos