Negin Mirsalehi, the influencer, businesswoman, and style icon, is missing the summer season. She just posted a series of throwback photos on Instagram, of herself spending a day at the beach. Mirsalehi posed in an orange bathing suit, while spending time on a boat. She captioned the post, "Summer of 21." How does she stay so fit? Read on to see 5 ways Negin Mirsalehi stays in shape and the photos that prove they work—and to get beach-ready yourself, don't miss these essential 30 Best-Ever Celebrity Bathing Suit Photos!

Mirsalehi opened up about her wellness secrets in an interview with Net-A-Porter.com. She says that she likes to eat a healthy breakfast each day. "I make oatmeal and add healthy toppings such as goji berries, nuts, seeds and fresh fruit. On hotter days I'll have an acai or smoothie bowl – I like to make them myself by using frozen bananas, avocado, dates and oat milk. If I'm in LA, I'll visit my favorite breakfast spot, Backyard Bowls."

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Mirsalehi is open about her love of taking supplements and vitamins. She tells Net-A-Porter.com that she often takes vitamins first thing in the morning with her breakfast. "I also take a vitamin B12 supplement with my breakfast, or I'll take propolis [a compound produced by bees, thought to fight infection] from my father's bee garden if I feel run down."

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Mirsalehi tells Net-A-Porter.com that she always tries to stay hydrated. Especially when she's about to get on a flight. She says, "I'm always flying for work and struggle to fight dehydration, so I start my morning with a tall glass of water before my skincare routine."

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For Mirsalehi, skincare is very important. She opened up about some of her secrets and her routine in an interview with Mojeh.com. "I always try to make sure I moisturize my skin, use sunscreen and drink lots of water, whatever season it may be. During winter, I pay extra attention to hydrating my skin, because of the cold weather, rain and wind, it can eventually take its toll! I think a healthy skin is solely dependent on good nutrition, hydration and sleep. Also, whenever I find a beauty product I'm satisfied with, I try not to switch to another one too often. Why fix what isn't broken?"

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Mirsalehi tells Savoir Flair that she likes to try new workouts and exercises. "I'm quite experimental when it comes to exercising, and I like to try new and different things. I don't have a strict workout schedule as it really depends on my day." Try the treadmill. "Maybe start by walking at a flat incline for 30 minutes to see if that's obtainable," says exercise physiologist Katie Lawton, MEd to the Cleveland Clinic. "Or put the incline at 5% to see how you do. Maybe slow down the pace or go for less time. See what your body can tolerate and build from there."