MG Fitness’ instructors summon sweat during fun group workouts while solo students try out more than 75 pieces of exercise equipment at two convenient studio locations. Workers-out looking to go it alone can bask in the glow of personal TV screens on Precor treadmills or opt for elliptical machines to help arms and legs build strength by repeatedly tracing low-impact ovals and hand turkeys. Men and women alike can tone up, using the sprawling selection of dumbbells and plate-loaded machines by Icarian and Hammer Strength to press, curl, and ripple. Fitness seekers in need of butt-busting camaraderie can drop in on classes that range from calorie-torching step aerobics to limbering power-yoga sessions, where students melt stress with stretches, poses, and deep-breathing exercises. To push clients toward fitness goals, certified personal trainers employ one-on-one coaching, exercise instruction, and the motivating growls of monster trucks.