In addition to easy access to the city’s finest dining, shopping, and cultural establishments, residents of the luxury rental apartments at 535 West 43 will enjoy on-site bonuses ranging from valet, concierge, and laundry services to a pet spa. With so many of their personal needs attended to on a daily basis, the New Yorkers who call these Midtown West apartments home will have time to take full advantage of their proximity not only to Hudson River Park, but to numerous cutting-edge fitness boutiques devoted to helping them stay fit year round.   Hudson River Park   The verdant Hudson River Park hosts a constant stream of cyclists, runners, power walkers, and other fitness enthusiasts. Forbes has described Hudson River Park as “just about the perfect route” for running in the city with its “easy on-off access and proximity to some of the city’s best sights.” Every year, some of America’s most elite athletes congregate here to take part in the New York Triathlon. For those who prefer their workouts at a meandering pace, the park also offers guided nature walks along the esplanade into September as well as free kayaking lessons at Pier 96. You can also access tennis and beach volleyball courts at Hudson River Park throughout the year.   Cycle   New York City has been at the center of the spinning craze that has revolutionized boutique fitness in the past few years. The most popular spinning outlets feature state-of-the-art equipment (including clip-in shoes provided for an extra-secure ride) and instructors uniquely qualified to motivate. At Cyc Fitness, which opened its Hell’s Kitchen outpost last summer, instructors guide you through the renowned “Cyc style” ride, which combines endurance workouts with bespoke training sections that borrow from boxing, rowing, and volleyball, among other sports. The studio has become a favorite with employees from The New York Times and Ernst and Young, some of whom regularly squeeze in a cycle during their lunch breaks. Those seeking to channel the energy or nostalgia of their team sports days can head to Swerve Fitness, where cyclists are assigned to one of three teams that compete for points during each ride. You can track your energy and calorie output and miles biked with their high-tech machines and enjoy a post-ride protein shake at their smoothie bar. For spinning with a touch of spiritual uplift, head to Soul Cycle just off Bryant Park, which has gained its cult following via calorie-torching workouts interlaced with life-affirming mantras and music.   Barre   Those in quest of a dancer’s slim, toned, and elegant physique have been “ditching yoga and Pilates and lining up at the ballet barre,” according to The New York Times. Fortunately for residents at 535 West 43, Midtown West is home to three of the city’s top barre studios. Physique 57 claims that you’ll see your body transform with its signature workout, which targets and exhausts arms, abs, legs, and buttocks before stretching and elongating them for relief. The Bar Method, which opened in New York City in 2010, has distinguished itself with its dedicated instructors and focus on finely calibrated movements that tease out and tone each muscle. Located within a luxury spa space, Exhale Central Park South offers traditional barre classes and more cardio-focused variants as well as yoga and HIIT classes. After class, treat yourself to a well-deserved massage or mani-pedi at their spa and Zen lounge.