Article: A gym membership will be your best friend if you plan on having a future as a professional model. Begin performing cardiovascular exercise like running, swimming, cycling, or aerobics in order to stay trim and healthy. Your goal should be to get your heart rate up, break a sweat, and maintain a steady pace for 30 minutes to an hour at a time.  To continue seeing progress and maintain your figure, you'll need to find time to fit regular exercise into your busy schedule.  Consider hiring a personal trainer to help you reach your fitness goals. Muscle-building exercises like weightlifting or calisthenics will also be necessary if you're interested specifically in underwear modeling. These activities increase your muscle mass and sculpt a more athletic looking build. Emphasize the parts of your physique that will stand out during photoshoots, like your biceps, triceps, abs, pectorals, and quadriceps.  Focus on high repetition, moderate intensity workouts, completing roughly 4-5 sets of 10-15 reps per muscle group.  Assuming you don't have access to a gym, you can still get your resistance training in at home by doing air squats, wall-sits, push ups, pull ups, crunches, and other bodyweight movements. Start making sound nutritional choices. All of the major food groups, including lean protein, carbohydrates, healthy fats, and fiber, should be represented in each meal you eat. Stick to the portion sizes recommended on packaged food products will help you avoid overeating.  When you get hungry between meals, snack on wholesome offerings like fruit, nuts, yogurt, and whole grains. That way, you won't be tempted to stuff yourself later on. Cut out overly fattening or sugary offerings, like fried foods, sweets, and alcohol. Not only are these types of items high in calories, they can also cause breakouts and other skincare issues. Get in the habit of applying moisturizer to your entire body daily. You'll be showing a lot of skin, so it's important to keep it smooth, supple, and properly hydrated. For your face, start using a nourishing face cream or mask designed to prevent wrinkles and blemishes.  Be sure to wear sunblock with a high SPF anytime you're out in the sunshine for extended periods. A good medicated lotion can be useful for protecting your skin from dryness and damage in colder climates. Sleep is essential for your overall health. A good night's rest will have you looking and feeling ready to take on the world. It also relieves stress and keeps your hormone levels normal, which will lower your chances of an inconvenient breakout.  Most people need between 6 and 8 hours of sleep every night to be at their best. If your busy schedule doesn't permit you to sleep straight through the night, try taking a couple short 15-20 minute naps throughout the day. Calvin Klein is famous for their sexy ad campaigns, where models are often shown posing in their underwear. This means that if you're lucky enough to land the job, you may be expected to wear revealing clothing. Try taking a little more off each time you pose for a photoshoot until it's no longer a big deal to rock your skivvies.  Embrace the way you look. Every body is different and beautiful in its own unique way. You don't have get undressed to have a shot at becoming the face of Calvin Klein. The company uses models to showcase many different clothing styles.
What is a summary of what this article is about?
Do cardio 4-5 days per week to stay lean. Perform some form of resistance training 3-4 times a week. Get your diet in check. Take care of your skin. Make sure you're getting plenty of sleep. Get comfortable showing off your body.