Power users are crowding Manhattan's boutique fitness-studio scene, spending hours a day on extreme workouts.
Updated: 09/24/2019 10:00A
Five to six times a week, Danielle O'Brien, a 32-year-old nutritionist in New York City, hits the gym or a boutique fitness studio for a workout. Sounds typical, but ...
Updated: 09/03/2019 04:14A