Supermodel Kate Upton on the Best Way to Stalk Your Baby

The new mom and co-founder of Strong4Me Fitness shares her favorite gear—from a smarter dog dish to her preferred way to obsessively monitor her offspring

My mom had us playing tennis very very young, but I take long breaks from tennis. So, sometimes I’m good and sometimes it’s a little embarrassing. I occasionally force my husband (Houston Astros pitcher Justin Verlander) out there, but he can’t play with me when he’s in season. If I’m rusty, I use a Prince racket because it’s more versatile and helps me get my spin back.

When it comes to my 4-month-old daughter, I’ve become a real stalker. I’m constantly watching her on the Nanit Smart Baby Monitor we set up. It tracks...