The 24-year-old model also reveals the workout that she believes has changed her body the most.
Nina Agdal has made a career out of posing for photographers, but admits that she's still stumped as to why paparazzi would want to take her picture.
Leonardo DiCaprio's girlfriend covers the March issue of Health magazine, and opens up about what it's like to have cameras following her around. "Every time people take pictures of me like that, I'm like, 'I don't really understand why you're doing it, honestly,'" Agdal says. "But I just try to not worry too much about it. But still, it's in the back of your head. You think, 'Is someone watching me right now?'"
WATCH: Leonardo DiCaprio's Girlfriend Nina Agdal Flaunts Her Figure for Sports Illustrated Swimsuit
While the paparazzi can be daunting, the 24-year-old model reveals how she almost always manages to have a great day. "I surround myself with positive, happy people," she explains. "And I always try to balance things that I have to do with things that I want to do."
MORE: Leonardo DiCaprio and Model Nina Agdal Spotted Kissing in Steamy PDA Pics!
Agdal -- who poses on the cover in a white bikini -- also offers some tips to working out and admits that there is one exercise that she loathes. "I hate running. I wish I loved to run, because I'd love to run through Central Park or on vacation on the beach, but I absolutely hate it," she confesses. "I do it for five minutes and I'm like, 'Ugh, why am I doing this?'"
As for the workout that she praises for transforming her model figure, Agdal discloses, "Yoga. When I do a lot of it, I see a lot of tone in my arms, which can be a tough area for me to get really toned in. So even though it feels like you're not really doing anything, you are."
Last October, Agdal shared with ET what keeps her motivated to hit the gym. "I always tell myself [working out is] the one thing I won't regret," she said. "Like, you'll always regret that slice of pizza, you'll always regret that glass of wine, [but] you'll never regret a good workout."