Frills equal distractions when it comes to working out, according to the certified trainers who own CrossFit Hardcore. That's why none of their classes involve fancy treadmills, designer rubber bands, or hot-pink tutus. nstead, the staff, which features trainers such as Dr. Adam Locker and Rachel Batista, lead students through group classes and personal-training sessions as seasoned coaches oversee each participant, monitoring progress as they deliver safety tips and words of encouragement. Gymnastics-inspired bodyweight exercises such as handstands and muscle-ups build lean muscle mass, and plyometrics foster agility and stamina with hops and leaps. Many sessions also incorporate running or rowing to raise heart rates and melt calories. In addition to sculpting sinews, kettlebell training cultivates flexibility with focused squats and swinging motions. Also, instructors instill in their clients the CrossFit style, with functional movements designed to boost strength, power, and coordination. Workouts take place in warehouses and other spartan spaces, which lack the bells and whistles that often masquerade as fitness essentials. Here, basic tools such as kettlebells, jump ropes, and weighted sleds get the job done for a wide range of exercisers, from absolute beginners to advanced athletes. Between adult classes, the coaches train kids aged 4 and older using CrossFit workouts scaled to different levels of strength, endurance, and giggliness.